JPH02500087A - Method and apparatus for varying pressure in a patient support system with low air loss - Google Patents

Abstract

Method and apparatus for preventing bed sores in a bedridden patient. A low air loss bed (10) is provided including a frame (12), a first set of substantially rectangular air bags (58) for supporting a patient thereon mounted transversely on the frame, and a second set of substantially rectangular air bags (58) for supporting a patient thereon mounted transversely on the frame, and all of the air bags are connected to a gas source. The configuration of the air bags (58) is such that when the first set of air bags (58) is inflated, the patient supported thereon is moved toward the first side of the frame (12) of the low air loss bed (10) and when the second set of air bags (58) is inflated while the first set of air bags (58) is deflated, the patient is moved toward the second side of the low air loss bed (10). The configuration of the air bags (58) also retains the patient on the top surface of the air bags when the patient is rolled in one direction or the other. The operator of the low air loss bed defines the pressures in individual air bags (58) corresponding to each of three positions to which the patient is rotated. The pressures are maintained by a feed back control system which actuates valves connecting the gas source to separate sets of air bags. The three positions to be sequentially attained thereby causing controlled oscillation of the patient from one side of the bed frame to the other. Because each rotation position corresponds to operator defined pressures, the oscillation is customized for individuals of different body weights.

Description

[Detailed description of the invention] Method and apparatus for varying pressure in a patient support system with low air loss [Background of the invention] This application is a part of our U.S. patent application Ser. No. 683,153, filed December 17, 1984. Our pending U.S. Patent Application No. 7, filed on October 4, 1985, is a continuation application. No. 84,875, a continuation-in-part application filed on September 9, 1986. This is a continuation-in-part of U.S. Patent Application No. 905,553.

The present invention provides a method and method for increasing or decreasing air pressure in a patient support system with low air loss. and equipment. In particular, the present invention provides two sets of attached air bladders and a first when supplying a set of air bladders and then supplying a second set of air bladders, Move the flap toward one side of the frame and then back toward the other side of the frame. The means in each bladder for moving the patient supported in the frame and the means in each bladder and means for maintaining the patient on the air bladder as the patient is moved to each side of the frame. The present invention relates to a bed having a frame.

This type of bed prevents eczema (bedsores) and prevents bed rest. It can be used to soothe and collect fluid in a patient's lungs. for the same purpose Other devices are also known, but these devices are not free from several problems. . In particular, U.S. Pat. No. 3,822,425 teaches A number of cells with patient-supporting surfaces formed from materials impermeable to solids and solids. That is, an air pine tress consisting of a bladder is disclosed. The patent also describes how cells can be A source of air to inflate to pressure and an outlet or exhaust boat to release the air. Disclosed. The stated purpose of this outlet is to remove condensed vapor from the cell or sac. The goal is to remove the

The outlet section of this pine tress is designed to control the amount of air flowing into the cell. regulating the air pressure within the cell, as opposed to regulating the air pressure within the cell. A reservoir valve can be fitted. However, as described in the same patent, today under the same patent Commercially available air beds are considered to have some drawbacks and limitations for patients. It will be done.

For example, this bed can be installed directly below the air pine tress to combine the air supply. and has one air intake joint located at its center. This connection is This is difficult because you have to lie on your back to get close to the body. Below the pine tress The connection location is such that the air hose must pass between the bed frame members. Therefore, this creates one constraint on the frame structure. Air to which the air hose is connected The supply source must be movable, so it must be a remote enclosure supported on casters. A blower or air pump placed inside the body. In actual use, I To move other equipment, such as a V-stand, around it or closer to the patient. There are many times when the housing must be moved. However, this blower device Moving it a significant distance may cause disconnection and flexing of the air hose from the frame. Due to its location on the underside of the bed, the air hose may need to be A pendant control is required to avoid wrapping around the frame member. pain In theory, disconnecting the air hose will result in a loss of air pressure in the air pine tress. This is even less desirable.

Further, the bed disclosed by the said patent requires only a limited amount of air in the air muffler. It is limited in that it cannot be pushed or pumped into the stress. Described in this patent By completely removing the outlet section, the air pressure inside the bladder can be maintained at least at this time. This means that the output of the gas source is maximized.

In the case of the bed described in this patent, if the outlet section is used for the above purpose, If it is necessary to further increase the pressure within the air bladder during this period, the only way to do this is to By installing a larger capacity blower in the housing, for example, it is possible to support an obese patient. High air pressure would be required to hold it. In general, larger capacity blocks wa requires higher power dissipation and larger capacitance circuits, and It is not easy to do so. Also, the larger the blower, the more noise this creates. Additionally, this is not desirable.

Another limitation of such beds is the regulation of air pressure within the air bladder in which the patient is supported. It is necessary to keep it constant. In general, beds with low air loss It is used for bed-bound patients, but not all bed-bound patients are immobile. example These patients are unable to move one arm every time they exercise or are unable to do so. Each time the patient is repositioned by an attendant, each head, back, A partial portion of the patient's weight supported by a set of air bladders placed over the body parts and legs. bring about change. the pressure exerted on the patient's skin as a result of such movements The air pressure in this area must be readjusted to avoid a local increase in No. Adjustment of the approximately constant air supply to a set of air bladders is carried out on the bed. As it is often necessary to vary the air supply to each set of air bladders, It affects the pressure in one or more adjacent sets of air bladders.

Additionally, low air loss bases of the type disclosed in U.S. Pat. No. 3,822,425 The bed is equipped with means for adjusting the patient's position on the bed. For example, the head of the bed can be raised to seat the patient or For the above reasons, place the patient in the Trendelenburg position. Or when placed in the reverse Trendelenburg position, adjust the angle of the entire bed frame It can be changed to flat. These changes occur in each pair of air sacs. Requires readjustment of air supply, typically further than necessary as a result of patient movement. Requires major readjustment.

A system featuring various other attempts to solve the problem of preventing pressure sores in bed patients. Limitations and disadvantages also; UK Patent No. 1,474,018 and US Patent No. 4.4. No. 25,676.

This prior art also uses air pressure to rock the patient back and forth. Many devices have been disclosed.

See, for example, U.S. Pat. No. 3,477.071, U.S. Pat. No. 3,775,781, the patient lies in bed using one or more inflatable inflatable for moving or reversing by alternately inflating and deflating the Discloses a hospital bed equipped with a capable device. UK Patent Application No. 2,026,3 No. 15 discloses a pad, cushion or pinerest of similar construction. . West German Patent No. 2816642 describes three longitudinal An air pine tress for bed or inpatient use consisting of oriented inflatable cells. The amount of air forced into each cell is shown from one side of the pine tress to the other. Modified to alternately rock the patient to the side. However, these pine tress or devices used in patient support systems with low air loss. It is designed like this. In addition, the aforementioned British and West German patents and U.S. patents No. 3,477.071 and No. 3,775,781 extend along the bed. Opens a device consisting of parallel air compartments extending in the hand direction and being alternately inflated and deflated. It shows. This structure allows the patient to comfortably adjust the inclination and angle of each part of the bed. corresponds to each part of the patient's body while lying on the bed so that it can be adjusted accordingly The use of this device on beds with flap sections is not permitted.

U.S. Pat. No. 3,678,520 discloses that when the air cells are inflated, they have a comb-like shape when viewed from above. It is provided in multiple tubes protruding from the header vibe so that it takes the form of The patent discloses an air cell used in a pressure pad. Two such air cells The tube is sealed in a pressure pad with interlocking protruding tubes and is alternately supplied and exhausted from one cell and then the other. This device is , so that the inclination angle of each part of the bed can be adjusted to the patient's comfort. Used on beds that have butterfly plates that correspond to each part of the body of a patient who is sitting down. or if the air loss is configured in the form of a small can't even function properly.

Many patents, both U.S. and foreign, first belong to one group and then One group of air cells is alternately inflated and deflated to support the patient over the other group of air cells. The present invention discloses an air pinerest or cushion made of pine cells. These patents No. 1,772,310, No. 2,245,909 No. 2,998,817, No. 3,390,674, No. 3,467. No. 081, No. 3,587,568, No. 3,653,083, No. 4,0 No. 68,334, No. 4.175,297, No. 4,193,149, No. No. 4.197,837, No. 4.225,989, No. 4,347,633, Nos. 4,391,009 and 4,472,847, and the following foreign patents: , namely British Patent No. 959,103 and Austrian Patent No. 401,767. , and West German Patent No. 2446935, West German Patent No. 2919438 and West German Patent No. 28 Including No. 07038. Both of the devices disclosed in these patents rock or shift the patient's body weight into more air cushions or cells. Further distributing the pressure above or alternately relieving pressure below each part of the patient's body.

Also disclosed are inflatable devices other than air pinerests or cushions; There are also a number of patents involving alternately supplying air to one set of cells and then to another set of cells. exist. These patents are U.S. Patent No. 1,147,560.

3,867.732 and British Patent No. 1,405,333. Of these patents, only the British patent applies Discloses the movement of All of these documents describe patient support systems with low air loss. No device is disclosed for use in the stem.

British Patent No. 946,831 describes inflatables placed in parallel and in communication with each other. A pneumatic pine tress is disclosed having a flexible elongated bladder. The inside of these two sacs A valve is provided in the connecting conduit. Support the patient against both capsules. A sufficient amount of air is supplied so that the bed or air pine tress remains stationary. Lift the patient from the other side. No matter how unbalanced the patient's weight distribution is, is delivered from one capsule to the other, and the patient is moved against the direction of the now deflated capsule. make it turn

An automatic switching valve, details not shown, deflates the initially inflated bladder. The bladder is inflated, thereby rocking the patient in the other direction. This device is suitable for pressure ulcers It is limited in its ability to prevent the patient from rocking toward the deflated capsule. to lift the patient off the bed or other surface on which the air pinerest is placed. Insufficient air flow may result in slats or other surfaces without air pine tresses. approximately the same pressure that will be exerted on the patient's skin. be. Even if there is enough air left in the deflated bladder to support the patient, However, if the air pine tress was constructed with a structure with low air loss, The retained air is gradually removed from the bladder until the patient is placed directly on the bed or other surface. It will be lost over time. Finally, this device can adjust the inclination angle of various parts of the bed. parts of the patient's body while lying on the bed so that the patient can adjust them for comfort. It cannot be used on parts with corresponding butterfly plates.

The present invention provides an improved device over the prior art.The present invention provides flexibility in use. air sacs despite changes in gender, patient movement, or bed frame position. Ability to maintain relatively constant air pressure within the body; Ability to quickly and easily replace the body, and ease of adjusting air pressure within the air bladder body It features numerous advantages that enhance its user over prior art devices, including .

It is therefore an object of the invention to provide a frame and a transversely supported a first set of generally rectangular gas permeable air bladders for supporting a patient; a second set of generally rectangular beams for placing a patient supported laterally on the beam; an air body permeating the body; a device for coupling each air bladder to a source of gas; When each air body in position is inflated, the patient placed on the first side of the frame a device integral with each air body of the first set of air bladders for movement; When the first set of air bodies is deflated and the second set of air sacs is inflated, the a second set of air bladders for moving a patient placed toward a second side of the room; a device integral with each air bladder body and a patient facing the first or second side of the frame; for alternately supporting the patient on the first or second set of air bladders when being moved; an integral device on each air bladder and select the pressure inside the air bladder at any given time. The purpose is to provide a bed with small air loss, including equipment for

Another object of the invention is to simply select the target pressure to be maintained within the air bladder. allows you to quickly and conveniently set air pressure to support patients of known weight. This results in the adjustment of the valve that adjusts the amount of air flowing from the air supply accordingly. The result lies in the provision of an air bed.

Another object of the invention is that it can be lifted, lowered or tilted, and part of the bed while maintaining the selected pressure or pressure range within the air sac. To provide a bed with low air loss and an integrated gas supply that allows for lifting and lowering movements. Ru.

Another object of the invention is to invert the patient back and forth on the bed while safely placing the patient. It is in the provision of a bed with little air loss that can be used.

Another object of the present invention is to provide an interconnected hinged body that substantially corresponds to each part of the patient's body on which it is placed. the patient in one direction and then in a second direction, divided into at least three parts can be moved alternately, and each part corresponding to the patient's body can be raised and lowered, against the patient while the patient is moved alternately in the first and second directions on the bed. The objective is to provide a bed with small air loss that increases comfort and therapeutic significance.

Another object of the invention is to maintain separate parts of the patient in fixed positions relative to each other; One part of the patient can be flipped alternately in one direction and then in a second direction. The aim is to provide a bed with minimal air loss.

Other objects and advantages will become apparent to those skilled in the art from the following description. cormorant.

[Summary of the invention]

The above objectives and advantages can be achieved by providing a gas source mounted on the frame. This is achieved in the present invention.

A number of sets of gas permeable air bladders are mounted on this frame, each set of air bladders being The body corresponds to one part of the patient supported in a prone position on the bed.

A number of individual gas manifolds each have a gas source and a pair of air bladders. It communicates with one group. Additionally, each gas manifold is connected by a gas supply source. By individually changing the amount of gas delivered to each region of the patient, A device is also provided for varying the amount of support provided.

It also includes a bed frame equipped with a gas supply source and a plurality of sets attached to the bed frame. A low air loss bed is provided that includes an air bladder that is permeable to water vapor.

The individual gas manifolds are located inside the air bladders in one of the pairs of air bladders. and in communication with a gas source. The Air 1III control box is attached to the bed frame. attached to the air flow from the gas source to the gas manifold, and Individually adjustable to change the amount of gas delivered to each gas manifold A valve is provided. The air control box is operated to selectively open all valves to the atmosphere. A device is provided which allows gas to escape from each of the air bladders in the set to cause the air bladders to deflate so that the patient is supported by the air bed frame rather than the air bladder. make it possible to do so.

It also includes a bed frame and an individual gas supply and air supply attached to it. An air body consisting of a plurality of sets including a plurality of gas manifolds communicating with the inside of the body A low air loss bed with and is provided. The air control box is installed in communication with the gas supply and gas manifold to the Change the flow rate from the gas supply through the air control box to each gas manifold Therefore, individually adjustable valves are provided. This air control box includes a complete air bladder. Operable means are also provided to simultaneously fully open the valve for full inflation. There is.

The frame also includes a plurality of air sources each communicating with the gas source and the interior of the air bladder. a plurality of sets of hollows attached to said frame having body manifolds; A low air loss bed with an air sac is provided.

An air control box is also mounted on the frame, and inside this air control box is a gas manifold. each gas manifold with a gas supply therein. means for individually varying the amount of gas delivered to the field. this air The control box also includes means operable to heat the gas flowing through the air control box. and is operable to switch said heating means on and off in response to the temperature within the air control box. There are also means that can be used.

Additionally, one of the gas manifolds is operable to individually control the heating means. Means is also provided having a sensor, the means operable at a predetermined temperature. The heating means is operable to switch on and off in response to the temperature within the air control box. Ru.

It also includes a frame and a first patient support member transversely attached to the frame. a second set of air bladders for patient support mounted transversely to said frame; a set of air bladders and means for coupling each air bladder to a source of gas; Each air bladder of the first set of air bladders is integral with said first set of air bladders; When the air bladder of the frame is inflated, the patient supported thereon is moved to the first side of the frame. means for moving said second set of air bladders, each of said second set of air bladders being integral therewith; The air sacs of the second set of air sacs are inflated and the air sacs of the first set of air sacs are inflated. means for moving the patient supported thereon to the second side of the frame when deflated; and when the patient is moved towards each of the first and second sides of the frame. A low air loss vector comprising means on the air bladder to hold the patient supported in the provided.

It also provides a means of controlling the pressure within the air bladder corresponding to three different rotational positions. be done. Such pressure can be adjusted by the operator and It acts to define each rotational position according to the size and weight of the body. at each rotation position Means is provided for sequentially reaching and maintaining speeds specified by the operator. Ru.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a preferred embodiment of the low air loss bed of the present invention; Figure 2 shows the air bladder with the second air bladder shown in dotted lines for clarity. A sectional view taken along line 2-2 of the bed in FIG. Figure 3 is a perspective view of the air piping of the bed with small air loss in Figure 1; FIG. 4 is a perspective view of one of the base plates of the low air loss bed of FIG. 1; Figure 5 is partially cut away to show details of the installed low air loss bed. An enlarged exploded perspective view of the lower surface of FIG. 4 showing the base plate, that is, the base plate; Figure 6 shows the head part to show the structure of the frame and the components attached to it. an end view of the low air loss bed of FIG. 1 in the lifted state; Figure 7 shows the legs lifted to show the construction of the frame and the components attached to it. An end view of the low air loss bed of FIG. Figure 8 shows the low air loss bed of Figure 1 with respect to line 8-8 in Figure 9A. 9A and 9B are cross-sectional views of the air box shown in FIG. 8, respectively. Cross-sectional view of the air box manifold assembly along lines 9A-9A and 9B-9B , Figures 10 to 10 show when all air bladders are fully inflated (Figure 10B) , the patient (+00) is on one side of the frame of the bed with low air loss (IOA) ・The book as it is then swung to the other side (IOC), i.e. supported on the air bladder. an end view of a patient supported on top of the air bladder of the low air loss bed of the invention; Figure 11 shows some alternative methods of attaching the air bladder to the bed frame. An air loss constructed in accordance with the teachings of the present invention with respect to line 11-11 of FIG. A composite vertical cross-sectional view of a part of the leg plate of a bed with small loss, Figure 12 shows the air loss in Figure 1. Schematic cross-section of a small bed of FIG. 13 shows one frame pivotally connected to an adjacent frame section. Part of the bed frame of Figure 1 showing the potentiometer mounted to the A perspective view of Figure 14 shows how the air is directed to the air bladder of the bed with low air loss in Figure 1. A schematic diagram of the electrical cables and controls that open and close the valve to Figure 15 shows a general-purpose type for controlling the operation of the bed with small air loss in Figure 1. Flowchart of Mar's subroutine, Figure 17 shows the switching process for controlling the operation of the bed with small air loss in Figure 1. subroutine flowchart, Figure 18 shows the bed with small air loss in Figure 1 and the rotating sub-table that controls its operation. Figure 19 shows the operation of the bed with small air loss in Figure 1. A flowchart of the subroutine of the valve motor to control, Figure 20 shows the air loss in Figure 1. Flowchart of the power failure interrupt subroutine that controls the operation of a small bed to, Figure 21 shows the desired air bag body used in the bed with small air loss shown in Figure 1. An end view of a new embodiment, FIG. 22, used in the low air loss bed of FIG. an end view of one of the air bladders; Figure 23 shows another air bag body used in the bed with small air loss shown in Figure 1. End view and FIG. 24 control operation of the low air loss bed of FIG. FIG. 2 is an overall schematic diagram of control software for this purpose.

[Detailed description of preferred embodiments]

In FIG. 1, a bed IO including a frame 12 is shown. This frame The frame 12 has a plurality of sections 14° hinged at points 44°, 44", 44'- , 14", 14'" and 14" and an end member 16. (Figs. 6 and 7) and retainers 19 (Fig. 7) are provided to increase rigidity. It is. The frame 12 has a head plate 20 at one end and a leg plate 21 at the other end. It is provided.

The headboard 20 and the footboard 21 are each actually two plates 20° and 20", respectively. , and 21' and 21'', which are separated from each other by vertical strips 25. 20° and 20" and 21° and 21" on top of the thin board. is installed.

A separate subframe generally designated by reference number 27 in FIGS. 6 and 7. The longitudinal beams 24, It is mounted on a base material 22 consisting of a crossbeam 26 and a crossbeam 28. This base The material 22 is supported by casters 3o at its corners. Leg pedal 42 is caster 30 for braking and steering.

The sub-frame 27 includes a transverse beam 29, a tie strap 35, and a longitudinal beam 31 ( (see Figures 6 and 7). The subframe 27 is attached to the IV bottle or Uprights 33 with tabs 33° are provided at the corners for the attachment of other equipment. There is. A conventional vertical structure for raising and lowering this subframe 27 with respect to the base material 22 Means in the form of a height adjustment mechanism is provided, but not all details thereof are shown.

In Figure 7, under the action of a hidden power screw, the motor is also energized by a hidden motor. The height is adjusted by rotating the shaft using the driving tunnel beam member 37.

Power is transmitted from the power screw to the shaft by an eccentric lever, and the axis of this lever is It is supported on and hidden by the drive tunnel beam 37. subframe 2 7 is lifted by a lever pivotally supported on the transverse beam of the base material 22. Lever The members to which the levers and levers are attached are shown in Figs. 6 and 7 by means of transverse beams 29. It's hidden and you can't see it.

Portion 14'' of frame 12 is connected to the subframe by support member 41 (see FIG. 6). It is attached to the longitudinal beam member 31 of 27. Frame containing substrate 52 The portion 14” of the frame 12 having the portion 14° of the frame 12 and the leg base plate 46 is The butterfly plates pivot upward from the horizontal at 44° and 44" respectively. The purpose of this pivot is for adjusting the inclination angle of each part of the patient's body, and the details of the pivot joint are Although not shown in the figure for the purpose of clarity, the motor is indicated by 45. switches 233, 235, 236 on the control panel 346 ．． 237, 238 and 239 or the manual control 3 of the bed. The circuits for these functions are The control box 43 (No. 7 (Fig.), which will be described in detail below.

When the head board 52 is in a horizontal state, the longitudinal beam member 31 of the sub-frame 27 is A support portion 17 is provided on the cross member 18 below the head base plate 52 to be placed. leg The substrate 46 is lifted up (FIG. 7) and the transverse bar 47 is lifted up along with it. It is lifted by the pivot joint formed by the notch 49 in the lift and stay 19 (transverse Bar 47 is shown removed from retainer 19 in FIG. 7 for clarity purposes. ). The pair of notches 49 adjust the height at which the transverse bar 47 can be lifted. The leg base plate 46 is connected to the longitudinal beam member 31 of the subframe 27. It pivots upwardly on a pivoted bracket 51. The tip portion 53 of the transverse bar 47 is When the leg board 46 is lowered to a horizontal position, it rests on the longitudinal beam 31.

The side rail 81 is connected to a support bracket 85 attached to the lower side of the head board 52. It is attached to a bracket 83 (see FIG. 6) which is pivotally mounted. side rail 87 is attached to a bracket 89 (see Fig. 7), and the bracket 89 is attached to a support bracket. It is pivotally connected to the bracket 91. The support bracket 91 is a support bracket on the lower side of the leg base plate 46. It is fixed to E19.

The frame 12 includes a leg board 46, a leg board 48, a live part board 50, and a head board. 52 (shown in dotted lines in Figure 3), each with a rivet 54 (see Figure 11). ) to the corresponding parts 14°, 14″, 14°” and 14- of the frame 12. be installed against the The air foreign body 58 is removed from the bed 10 with small air loss. Means is provided for freely fixing it. Figures 2, 4 and 5 In the following, a presently preferred embodiment of said removably securing means is shown. There is. 4 and 5, a portion of the leg board 46 is shown, and this board The entire leg board 46, leg board 48, living part board 50, and head board 52 are shown in FIG. Holes 64 are provided therethrough, alternating along the length and opposite each other.

Every other hole 64 has a key for receiving the column 32 with the retainer 34 inserted. - A slot 11 is provided through which it projects from the bottom surface 79 of the air body 58. , whose flange 71 is attached to the bottom surface 79 and bottom surface 72 of the air bladder 58 It is held between the batches 69 and 69 which were removed. The air bladder 58 is shown in the fifth position for clarity. In the figure, it is shown in a broken state by a dotted line. The air bladder 58 also has an integral extension. A nipple 23 made of a highly elastic polymeric plastic material with a long tab 15 is also provided. . The air body 58 is attached to the leg substrate 46 or to another substrate 48, either 50 or 52. The column 32 is removably fixed to the column member 32 until the retainer 34 comes out from the bottom. is inserted into the hole 64. Post 32 is then slid into engagement with key slot 11. The retainer 34 engages the bottom side of the leg base plate 46 around the six 64 to open the air bladder. The body 58 is held in place on the leg base plate 46. Next, the nipple 23 is connected to the key slot. The extension tab 15 is inserted into the hole 64 on the opposite side of the hole 64 with the flat head screw 13. to lock the nipple 23 in place. help.

In another embodiment, the substrates 46, 48, 50 and 52 have an air bladder 58 on the edge. A low air loss bed in the form of male snaps 56 (FIG. 11) along the Means are provided for removably securing it to the O. to the air sac body 58 is provided with flaps 60, each of which has a female snap that engages a male snap 56. A tap 62 is provided. Flap 60 alternating VELCRO tape 55 Vignetting, board 46.48° VEL (:RO hook 5 Seven associated strips are provided to secure each air bladder 58 in place.

Alternatively, flap 60 and substrates 46, 48, 50 and 52 have VEL Both CRO and snap fastening means are provided.

The air bladder body 58 is approximately rectangular in shape and is made of coated fibers or are formed from similar materials through which water vapor can flow, but water and other liquids cannot Not transparent. Fibers marketed under the trademark GORE-TEXJ are This is one suitable material. The air bladder body 58 is thus inflated. 1 to allow air to escape, which can be configured in a “low air loss” configuration. It may contain more than one outlet.

In FIGS. 1 and 2, differences due to the arrangement of the bed IO on the frame 12 are shown. It is shown in its new form.

For example, the air bladder body attached to the leg part board 48 and the living part board 5o It is indicated by the number 322. Air bladder bodies 321, 322, 325 and 328 are approximately rectangular. It is configured in the shape of a shaped casing, and at least the top surface 323 of the casing has the above-mentioned water vapor. Formed from a material that is permeable. Air bladder body 321.322.325 or 32 B, the interior of this housing is coupled to a supply source, such as a blower 108, to connect the substrate 5. A nipple 23 ( Means are provided for inflating the housing in the form of (see FIG. 2) with gas. air sac body 321.322.325 or 328 also converts the enclosure into a low air loss bed. The above-mentioned column 32 and retainer 34 are removably fixed to the IO. Means of the form is provided. When the air bladder 322, 325 or 328 is inflated A patient 348 supported on an air bladder 322, 325 or 328 is attached to the frame 12. to one side of the frame 12 and the patient 348 to one side or the other of the frame 12. The top surface 323 of the air bladder 322, 325 or 328 when inverted or rocked. Means are provided for holding the patient on top (Figures 10A to 10D). air sac body Air bladder 322.325 or 32 when 322.325 or 328 is inflated This means of moving the patient 348 supported on 8 towards one side of the frame 12 , on the generally rectangular shaped top 323 of each of the air bladders 322, 325 or 328. It has a notch 324.

In each of air bladders 322, 325 or 328, a patient 348 is , 325 or 328, the space-time is flipped towards the side of frame 12. A cavity that holds the patient 348 on the top surface 323 of the air bladder body 322, 325 or 328. Means in the form of a column 326 that is integral with each of the air bladders 322, 325 or 328 is also provided, which air bladder 322, 325 or 32 when inflated. 8 and protrudes upward to form the ends and corners of the approximately rectangular housing.

This for holding the patient at the top 323 of the air bladder body 322% 325 or 328. The means are also attached to the side rails 81 on both sides of the frame 12 of the bed. It may take the form of a large foam cushion (not shown). This cushion is , can be removably attached to the side rails 81 and 87, or is divided so that one part is located on the rail 81 and the other part is located on the side rail 87. can do. The air pressure inside the air bladder 322.325 or 328 is: As described in the bed frame 12 and then back towards the other side of the bed frame 12. is adjusted until the

As shown in FIG. 1, a plurality of air bags 58, 321, 322, 325 and and (or) 328 are mounted transversely on the frame 12 of the bed IO. There is. The air bladder body 322, 325 or 328 includes the column body 325 and the notch 324. is closer to one side of the bed frame than the other, and the columns 326 and a second set of air bladders 322 with recesses 324 near the second side of the bed frame 12; ．． It is divided into a second set close to 325 or 328. First set of air bladders 322 ．． 325 or 328 and a second set of air bladders 322, 325 or 328 alternate with each other along the entire length of substrates 46, 48, 50 and 52. Explained below As will be seen, the first stake of the air bladder 322, 325 or 328 is connected to the blower 10. The patient 34 is inflated with air from 8 and thereby supported by the air bladder 322. 8 (not shown in FIG. 1, see FIGS. 10A to 10D) of the frame 12. transferred towards the first side and then the second set of air bladders 322.325 or 3 By deflating while 28 is inflated, the patient 348 is placed in the frame of the bed. the other side of the frame 12.

The torso of the patient 348 is initially attached to the air bladder 321 attached to the head board 52. to one side of the bed frame 12 and then back to the other side of the bed frame 12. flat so that the head of the second person 348 is held in a generally constant position during the transfer. A top surface 323 is provided. In FIG. 23, the lower part of the head of patient 348 is shown. An air bladder 321 used for this purpose is shown. The air bladder body 321 is approximately rectangular in shape. shape, but an inclined upper surface 323 is provided in the region 331 adjacent to the corner 448. It is being The height of the air bladder body 321 is such that the patient 348 has an air bladder body 58.322.3. 25 and/or 328 when lying on the relatively heavier part, i.e. the torso than the head. Each part of the air bladder 58, 322, 325 and ( or) 328 to sink into the air bladder 58.322.325 and (also ) will be smaller than the height of 328. Patient 348 has air sac 58.322.3 25 and/or 328, the head rests evenly on the air bladder body 321. This is because the head does not sink into the air bladder body 321 to the same extent as the rest of the torso. It's a good thing.

An air bladder 328 supported on the foot substrate 46 and a portion of the leg substrate 48 The air bladder body 328 also has a notch 324 and a cutout 324 as described for the air bladder body 322. and a pillar 326 are provided. Furthermore, the air bladder body 328 is By mutually restraining the patient 348 from moving during alternating anteroposterior movements. patient 348 is held on top surface 323 of air bladders 58, 322, 325 and 328. 348 to help reduce the pressure exerted on the patient's skin over a large area. A nub 330 is provided to aid in dispersion.

In FIG. 22, an air bladder 328 with a hump 330 formed on its upper surface 323 is shown. A side view of the air bladder is shown (“side view” refers to the air bladder itself; if the air bladder If 328 (or 321 or 322) is attached to bed IO, is an end view of the bed). As can be seen, when the air bladder 328 is inflated, The hump 330 and the post 326 protrude upward so that the patient 348 can rest on the bed frame 1. 2. Helps prevent too many transfers to one side or the other. air sac body An alternative structure for 322 is shown in FIG. 21 at reference numeral 3325. air sac body 32 5 is a notch 32 having approximately the same depth as the notch 324 of the air bladders 322 and 328; 4 is provided, but the slope of the upper surface 323 in the region 327 is The slope of the upper surface 323 in the regions 329 and 328 is smaller than that of the upper surface 323. Sky The air sac 325 fills the air within the air sac 58, 321, 322 and/or 328. In connection with adjusting the air pressure, the patient 348 may move from one side of the bed frame 12 to the other. different parts of the patient's 348 torso to increase or decrease the extent and speed with which they are transferred to Can be used below. For example, the air bladder 325 is particularly Well suited for use below.

As mentioned above, air sacs 58.321, 322.325 and 328 are all Approximately rectangular shape with dimensions of approximately 46 x 99 cm (18 x 39 inches) present. Each has an air bladder 58.321, 322, 325 or 328. A bar attached to the side wall surface 61 holds the side wall surface 61 so that it does not bend when inflated. A buffer 460 is provided. Each corner 448 has a curvature of approximately 76 mm (3 inches) The notch 324 has a depth of approximately 254 ohm (10 inches).

The size of the columns 326 of the air bladders 325 and 328 in the direction indicated by line 450 The length is approximately 178 m, as is the direction of notch 324 in the direction indicated by line 452. m (twift). The column of air bladder 322 in the direction indicated by line 451 The size of 326 is approximately 305 vm (12 inches). Air along line 453 The dimensions of the upper surface 323 of the bladder 325 are approximately 305 mm (12 inches); The upper surface 323 has a notch 3 with a radius of curvature 455 of approximately 152 mg + (6 inches). It falls to 24. In FIG. 2, the dimension of top surface 323 along line 458 is approximately 2 It is 29 mm (9 inches).

The size of hump 330 in air bladder 328 in the direction indicated by line 454 is approximately 1 27 m (5 inches) and measures approximately 5 inches in the direction indicated by line 456. 08+am (2 inches). Dimensions of surface 333 as indicated by line 458 is approximately 356+am (14 inches).

Alternative structure for attaching air bladders 58.322 and 328 to bed lO In the structure (FIG. 11), each air bladder 58 (in this specification, air bladder 5 When referring to 8, the air bladder is also 321.322, 325 or 32 8) is provided with a flanged nipple 70. , whose flange 71 is located at the bottom of the air bladder 58 between the air bladder batch 74 and the bottom 72. 72. As discussed below, each air bladder 58 has a substrate 46 . 48. Flaps of each air bladder 58 on male snaps 56 at edges of 50 and 52 60 female snaps 62 or VELCRO tape 55 or substrates 46, 48, 50 and 5 individually by hooks 57 and 57. Attached to 2. When placed in this manner, the inside 72 of the bottom of the air bladder 58 The flanged nipple 70 in the board 46, 48, 50 or 52 hole 64 right and 64', on which the air bladder 58 is positioned. With each flange An O-ring 68 is provided in a groove (not shown) around the nipple 70 to secure the flange. A flanged nipple 70 and a corresponding substrate from which the flanged nipple 70 projects 46, 48, 50 or 52 to ensure a mutually tight fit.

Individual air bladders 58.321.322.325 rather than a single air cushion or 328, in case of leakage, cleaning or other precautions required. Allows for replacement of the sac. Air bladder body 58.321.322, 325 or 32 8 from its respective substrate 46, 48, 50 or 52, the column 32 from the key slot 11, and remove the retainer 34 and the column 32 from the six 64. Remove. Then rotate the extension tab 15 until it is removed from the screw 13. and pull it out securely to remove it from the hole 64. In the case of the air bladder body 58, this Connect the female snaps 62 at each end of the air bladder 58 to the substrate 46, 48, 50 or 52 from the male snaps 56 (alternatively, attach the VELCRO strips to each other). 46.4 by twisting the flanged nipple 70 upwards. 8. Remove the air bladder 58 from the 50 or 52 hole 64. The patient's inflated air sac Perform the removal while lying on the body 58.321, 322.325 or 328. It is even possible.

Even more secure when holding the air bladder 58 against the air bladder 46, 48, 50 or 52. In order to ensure that the flanged nipple 70 and each base plate 46 from which it protrudes ．． 48.5o or 52 to help ensure an airtight fit. 73 (see FIG. 11) into the nipple 70 of the air bladder 58. nipple 70 In order to insert the spring clip 73 into the hole 54, the ring portion 75 of the spring clip 73 (air bladder 58) at the end of the shank 101 of the spring clip 73. The flanges 77 are moved relative to each other so that they enter the holes 64. Once When inserted into the hole 64, the flange 77 springs apart and the spring clip 73 is inserted again. The nipple 70 cannot be removed from the hole 64 unless the ring portion 75 is pressed. 6, an end view of a bed constructed in accordance with the present invention is shown. reserve 102 is fixed to the cross beam 29 of the subframe 27 with bolts 104. ing.

The blower 108 is integrally attached to the blower housing 116 through a plate 112. It is attached to the retainer +02 by bolts 110. gasket, beni or particle board (not shown) or other sound and vibration damping material. A piece of material is inserted between the mounting plate 12 and the retainer 102. of such materials A strip (not shown) can also be inserted between the stay +02 and the crossbeam 29. Ru. Blower 108 has an integral permanent split phase capacitor motor +14 . , when electric motor 114 is energized, blower 108 blows air into blower housing 1 16 through the blower funnel 118 and blower hose 120 to the air box flap. to the funnel 122 and to the air box 124 (see Figures 3 and 6). .

Blower 108 receives air from filter box 96 via hose 98 (FIG. 3). reference). The filter box 96 is attached to a frame 100 (see FIG. 6) for easy removal. (reference). Frame 100 is attached to frame 27 and Almost the cross beam 26 of the base 22 and the cross beam 29 of the frame 27 in FIG. more hidden and invisible.

The second blower 10B increases the air bladder capacity by increasing the amount sent to the air bladder body 58. Provided to increase air pressure within body 58. Cover lined with acoustic absorbing material (not shown) is also used to reduce noise by sealing the blower 108. can be provided.

The air control box 124 is mounted on a bracket 125 below the head board 52. It is an airtight box, the details of which are shown in Figure 8, and Figures 9A and 9B. . Manifold assembly in front of air box +24! 26 are provided. Mani Fold assembly +26 covers the foot, leg, vital, back and head regions, respectively. to the air bladder 58 attached to the substrates 46, 48, 50 and 52 at with holes (unnumbered) for coupling with means for changing the amount of air delivered A manifold plate 145 is provided. Gasket +15 is air box 124 This prevents air from leaking between the manifold plate 145 and the manifold plate 145.

In the presently preferred embodiment, the amount of air supplied to the air bladder 58 is varied. 128, +30a, 132a and 1 32b, and a plurality of valves shown at 134a and 134b (a third (see also figure). Valves 128.130a, 130b, and 132a and 132b , and each of 134a and 134b has a drive shaft (not shown) of each electric motor 138. ) and held in place by locking screws 149 on collar 148. An electric motor with a nylon threaded shaft 139 (see FIGS. 8, 9A, and 9B) A machine 138 is provided. The plug 140 has a limit pin +4 of this plug 140. 1 fully inflates motor support bracket +43 immediately adjacent to specific plug 140 When engaging one or the other of the supports 142 held on the plate 144, the screw shaft 139 It moves freely in and out along the .

Valves 128.130a and 130b, 132a and +32b, and 134a The fully inflatable plate 144 has holes 202 forming part of the butterfly plate 1 and 134b. 46 to the back of the manifold plate 145 (see Figures 9A and 9). (See also figure B), the gasket 147 is connected to the fully expanded plate 144 and the manifold plate 14. This is provided to prevent air leakage from between the Limited to electric motor 138 No switch is provided, and the plug 140 along the threaded shaft 139 of each motor 138 The back and forth movement is caused by the engagement of the plug 140 with the oversized 202 that moves the plug 140 forward. and when the plug 140 is retracted on the screw shaft 139, the collar 148 The engagement of the rear side of plug 140 with The compression state is on the electric motor 138. continues until the load is sufficient to cause the motor to stall and stop. Color O-ring 206 provided on 148 is engaged by the rear side of plug 140 It operates in a similar manner.

The restraint of motor +38 due to the loading of O-rings 204 and 206 is and the direction of movement of the plug 110 along the screw axis 139 However, this is because the screw shaft 139 is not restrained. The screw shaft 139 can be freely oriented is reversed, and the load caused by the compression of the O-ring 204 or 206 is The plug 140 is rotated so as to be released by the rotation of 39, and the plug 140 is supported by the restriction pin +41. Rotate together with the screw shaft +39 until it comes into contact with the holding part +42.

As axis +39 continues to rotate, the plug is moved along this axis.

The dump plate 150 is attached to the outside of the manifold plate 145 by a butterfly plate 151. (See Figures 9A and 9B). Manifold plate +45 and dump plate 15 A gasket 106 is provided to prevent air from leaking between the two.

The dump plate 150 is provided with a joint 153, and as described below, the dump plate + When 50 is in the position shown in FIGS. 8, 9A and 9B, a suitable bed -7 frames of gas supply holes 174.176a, 176b, 178a and 178b , and to connect 182a and 182b, the inside thereof is a manifold plate. It is continuous with the hole at +45.

The block +54 is attached to the dump plate 150 by screws 155, and selectively so that the pull plate 150 is further away from the manifold plate +45 on the butterfly plate 151. The cable 158 can be slid back and forth within the cable +56 for pivoting. Line 158 serves as the point at which 156 can be locked by nut 157. fixed to the manifold plate 145 by the end of the lever and the lock nut 159. It will be done.

Line 158 is connected to a bracket attached to tube 190 (see FIG. 7) at its other end. It is fixed relative to the cut 183.

The bed frame 12 is provided with quick-acting dump levers 165 on both sides thereof, This quick-acting dump lever 165 is connected by a tube 190 to both levers. 165 causes movement of line +58 in cable 156 to cause dump plate 150 is adapted to provide remote control over the operation of the. Rapid dump lever 165 When either one of the eccentric levers is moved from the position shown in FIG. The arm 181 pulls the wire 158, and the cable 156 is locked to the bracket 182. A wire 158 is adapted to move within the cable 156. lever arm 1 The locking action of the cable +56 under the action of 81 and the cable in the line 158 The details of the movement include the cable 160 and its interior under the action of the lever arm 185. (see below). The motion of line 158 is Pivot the dump plate 15G away from the manifold plate 145 to remove the air bladder. The air in body 58 flows through manifolds 76, 78, 80, 82 and 84, and Gas supply hose 174.176a of the frame! 78a, +80a% 176b, +78b and 180b in this way. 5 and the dump plate 150 to allow the air to escape into the atmosphere. The bladder 5B is made to deflate quickly.

The coil spring 201 is inserted into the inner hole (number) of the dump plate 150 and the manifold plate 145. Dump plate 150 and manifold plate 14 surrounding line 158 in biased away from 5.

As best shown in Figures 8 and 9B, another cable +60 connects the screw. The mounting provided passes through the manifold plate 145 within the fitting 161 and the wire 162 is located within the manifold plate 145. so that it slides back and forth. Line +62 is fully expanded plate 14 by nut 163 4, and this nut connects the full expansion plate 144 to the manifold on the butterfly plate 146. Pivot away from plate 145. From a manifold plate 145 like this Pivotal movement of the fully inflatable plate 144 away from the air flow causes the fully inflatable plate 144 to move away from the Pull out the machine support bracket 143 and all other parts attached to these parts. Raise the air valves 128, +30a and 130b in the air box 124.

Inside the joints 153 such as 132a and 132b, and 134a and 134b, etc. and +74, +76a and bed frame gas supply hoses without obstruction. +76b, 178a and +78b, resulting in air sac 58 and place patient 348 in the position shown in FIG. 10B. to facilitate patient movement and other needs.

The coil spring 201 is connected to the manifold plate 145 and the fully expanded plate 144. 62 to the inner hole (no number), and completely expand the manifold plate 145 to the expansion plate 1. biased away from 44.

Line 162 connects to a lever attached to bar 195 on which full inflation knob 193 rests. - The other end is locked to arm 185 (FIG. 7). bed frame 12 is provided with a full inflation knob 193 on both sides, and this full inflation knob 1 93 are joined by a bar 195 and both are connected to wire 162 via cable 160. It is designed to control the movement of. Cable 160 is DELRIN bearing Bracket 197 by threaded cable end 199 supported on 209 This bearing is fixed to the rotational movement of the full expansion knob 193! Do 62 to pivot the fully inflatable plate 144 on the butterfly plate 146 by sliding it therein. Receive 195 bars. Electric motor 138, support part +42 and electric motor support bracket The weight of the motor support block 143 causes the full expansion plate 144 to The racket 143 and its attached components are removed from the gas flow by the valve 128.130a. and 130b, and 132a and 132b, and 134a and 134 It is biased toward the position where it is pulled up toward the fiber handle 153 of b. This biasing effect Either one of the lines 193 connects the joint between the line 162 and the lever arm 185 by gravity. sufficient to move plate 144 away from the over-center position causing it to open. It acts as a release means so that it only needs to be rotated. In Figure 10B , after the full inflation plate 144 is opened, the patient 348 is exposed to the air bladder 322 (and/or ) 58.321, 325 or 328) shown lying on . When knob 193 is turned to its initial position, lever arm 185 From the point where 62 approaches bar 195, that is, from the over-center position, line 162 and lever - arm 183 is rotated past 180° to a rotated point.

As discussed below, microprocessor 240 includes an alarm buzzer (not shown). and either the knob 193 or the lever 165 is connected to the air bladder 5. 8. Expanding or deflating 321.322, 325 and/or 328 When used to activate the alarm, a switch (not shown) is provided to activate the alarm. can be used.

Air is passed through the air box funnel 122 of the back plate 121 (FIG. 3) to the air box 124. Enter. The air box funnel 122 is shown schematically at reference numeral 117. A one-way butterfly valve is provided so that when only one blower 108 is operated, air is Avoid escaping from the box 124. The air box +24 is generally designated by reference number 172. The heating strip shown is provided. The heating strip 172 has two air boxes 124. It is attached to the partition wall 133 of the air box 124, which is preferably divided into sections.

Air enters one compartment of air box 124 (i.e., behind heating element 172) and empties. For exiting the other compartments of the air box 124, the air flow is fitted with a heating element 172. It passes through the space between the partition walls 133 and must be mixed and heated in the process. No.

In FIG. 3, the blower 108 is turned on and passes through the hole 98 from the filter box 96. Blower hose 120, air received into air box 124 via one-way valve 117 Force the air, that is, pump it. Air bladder 58.321.322.325 and 328 In order to increase the ability to control the air pressure within the bed, one of the blowers 108 and and blower 432 (see FIG. 7). A valve 109 is provided for sealing. Valve 109 also connects both blowers 10B. air pressure by restricting air flow from one of the blowers 108 during operation. Used to load adjustment ability.

Air is supplied from air box +24 to valves 128, 130a and 130b, 132a and Bed frame gas supply via +32b and 134a and 134b. Supply hoses 174.176a and 176b, 178a and 178b, and 1 Run away towards 82a and +82b. Bed frame gas supply hose +7 4.176a and 176b, 178a and 178b, and 182a and and 182b direct air to manifolds 76 and 76°, 78 and 78', Send to 80 and 80°, and 82° and 84.

Bed frame gas supply hoses 178a and 178b connect to the live area gas manifold. Combined with folds 78 and 78°, these manifolds Leg gas manifold 78 is connected by gas supply hoses 180a and 180b of the and 78°. Bed frame gas supply hose 182a and 182b direct air to the back gas manifolds 82 and 82°, respectively. Send against.

The bed frame gas supply hose +74 supplies air to the head gas manifold. Send to 84. Gas manifolds 76 and 76°, 78 and 78°, 80 and and 80°, 82 and 82°, and 84 each correspond to the substrates 46, 48, 50 and 84. and 52 leads 76 and 76°, and the leg board 48 is connected to the gas manifold. The molds 78 and 78' are attached, and the raw substrate 50 is attached to the gas manifold 8. 0 and 80' are installed. The head board 52 and its corresponding parts of the frame 12 The section 14°” includes two back gas manifolds 82 and 82° and a head A partial gas manifold 84 is provided.

The foot substrate 46 extends beyond the end member 16 of the frame 12 at the foot of the bed. Therefore, the figure 1 portions 86 and 86° correspond to the foot gas manifolds 76 and 76°. are provided at the outermost end of the foot base plate 46 and extend the foot extension hoses 88 and 88°, respectively. to hoses 64 and 64' (FIGS. 3, 7 and 11). Nobu Ashibe Connect long hoses 88 and 88° to nipples 23 and 1 in holes 64 and 64'. A clamp 65 is provided to hold the portion 86 and 86° in place. Head The base plate 52 also extends beyond the end member 16 of the frame 12 at the head end of the bed. and a figure 1 portion 92 is provided from the head gas manifold 84 to direct air. A head extension hose 94 feeds the hole 64 at the outermost end of the head base plate 52 .

A clip is used to hold the head extension hose 94 in the 1-shaped portion 92 and the receiving portion 66 of the hole 64. A lamp 65 is provided.

Air is supplied to each bed frame through gas supply hoses 174.176a and 176b. , 178a and 178b, +80a and 180b.

or 182a to gas manifolds 76 and 76°, 78 and 78°, 80 and 80', 82 and 82°, or 84 and then gas manifold. Old 76 and 76', 7B and 78°, 80 and 80°, 82 and and 82 degrees, or 84 degrees. Air is supplied through the gas manifold 76 and 76°, 78 and 78°, 80 and 80°, 82 and 82 or 84 through holes 64 and 64 in substrates 46, 48, 50 and 52. and escapes to the air bladder 58, thereby inflating the air bladder 58.

Air bladders 322, 325 and 32 via substrates 46, 48, 50 and 52 Holes 64 and 64° extending into 8 run the entire length of the frame 12 of the bed IO. They are arranged in a staggered pattern.

In other words, every other hole 64 or 64° has a key slot 11 (see Figure 4). ) is provided. Each of the air bladder bodies 322, 325 and 328 has one A nipple 70 or 23 is provided in the column 32, and a hole 64 or 6 at the other end is provided. A retainer 34 is provided for engagement of the 4° key slot 11. air The bladders 322, 325 and 328 are attached to the substrates 46, 48, 50 and 52. The orientation changes alternately, resulting in halves of the air bladders 322, 325 and 328. of the other half of the air bladder 322, 325 or 328 mounted thereon. Nipple 70 or 23 on one side of bed frame 12 than nipple 70 or 23. is placed close to 23.

Bed frame gas supply hoses 174, 176a and 176b, 178a and 178b, +80a and 180b, and 182a and 182b. gas manifolds 76 and 76', 78 and 78°, each circuiting; 80 and 80', 82 and 82°, or 84, so each air body manifolds 76 and 76°, 78 and 78°, 80 and 80', The amount of air supplied to 82 and 82° or 84 is determined by the valve on the air box 124 + 28, +30a and 130b, 132a and +32b.

and 134a and 134b.

Valves 128, +30a and +30b, 132a and 132b, and 1 34a and 134b are manifolds 76 and 76°, 78 and 78°, 80 and 80°, 82 and 82", or one of the 84 To control valves +28, +30a and 130b, +32a and +32 b, and 134a and +34b are gas manifolds 76 and 76, respectively. °, 78 and 78°, 80 and 80°, 82 and 82°, or every 84 Controls the amount of air supplied to the set of air bladders 322, 325 or 328.

Also shown in FIGS. 3 and 7 is a portable power supply means, generally designated by the number 426. The indicated transporter is shown. The portable power supply device 426 is a battery 43 0, a case that seals the blower 432 and battery charger 34 and hose 436. 428. The hose 436 is attached to the subframe 27. and a fitting 44 of a hose 442 that connects to the air box 124 via a funnel 444. A removable fitting 438 is provided which engages the 0. The bracket 446 is A subframe is provided for removably engaging the case 428 of the portable power supply 426. It is attached to the board on the frame 27. Portable power supply device 426 does not have a power outlet At times, for example, during patient transport, pneumatic pressure is provided to support the patient.

Gas manifolds in the back, limbs, legs and feet, respectively, as described below. air bladders 322 and 32 coupled to leads 76.78.80 and 82; 8 alternately inflate first, then the gas manifolds of the back, vitals, legs and feet. Air bladder 322 coupled with fields 76', 78', 80' and 82° and a device for deflating said air bladder while inflating 328. ing.

A first set of air bladders 322 and 328 and a second set of air bladders 322 and The alternating inflation and deflation of 328 is caused by the notches in the air bladders 322 and 328. Because of the alternating arrangement of the 324, the patient 348 supported thereon can then be moved in one direction. Alternately swing in other directions.

To effect rocking of the patient 348, a suitable air bladder is placed under microprocessor control. alternately inflate and deflate. In FIG. 3, valves 130a, 132a and and 134a supply air to manifolds 82, 80, 78 and 76. do. These manifolds connect the pillars 326 and cutouts 324 to the bed frame. A first set of air bladders 322 and 325 located near the first side of the arm 12 and 328. Similarly, valves 130b, 132b and 134b supplies air manifolds 82°, 80’, 78° and 76°; The Nifold has its post 326 and cutout on the second side of the bed frame 12. The second set of air bladders 322, 325, and 328 are supply energy. Valve 128 supplies air to manifold 84 and The shield supplies air to the air bladder 321 that supports the head of the patient 348. each The pressure in the manifolds is controlled by the individual valves that supply air to each manifold. can be controlled by the microprocessor 240. The software is Move the patient sequentially to each of three positions corresponding to the pressure set by the operator be programmed to do so. Figures 10A, 10C and 10D are Three such positions are shown sequentially followed by the software.

A hump 330 in the air bladder 328 allows one of the patient's 348 legs to cross the bladder 328. The longitudinal barrier formed by the hump 330 even during mutual expansion and contraction. A longitudinal barrier along the top surface of the air bladder 328 so that it is also retained on the side of the air bladder 328. I will provide a. In this way, the hump 330 holds the patient 348 on the bed frame 12. Prevent excessive rocking to one side or the other. Furthermore, the legs of portion 348 are , while the patient 348 is alternately rocked from one side of the bed frame 12 to the other. Does not slip or rub. Those skilled in the art will appreciate that the air bladder 32 with the hump 330 8 depending on the type of therapy and degree of exercise required for a particular patient. It will be appreciated that 321, 322 or 325 could be replaced.

The software operates on an internal interrupt basis. That is, the software is It remains idle until a certain number of clock pulses are received, at which time the interrupt A signal is generated internally by microprocessor 240. The software is Upon detection of an internal interrupt, software modules for various functions are activated as shown in Figure 24. The modules are executed sequentially. Microprocessor 240 handles internal interrupts for 50 milliseconds. The functional software module in Figure 24 executes every 50 milliseconds. will be carried out.

Next, in FIG. 24, the functional software used to execute the control function of the present invention is shown. A block diagram of the software module is shown. The initial Power-down and power-down routines are also present in this software, but they are It has been omitted from this figure for the sake of clarity. It also eliminates various interrupt service routines. It was. 24 is simply executed by microprocessor 240 every 50 milliseconds. It merely indicates the application software that will be used.

Further details regarding some of the functional modules or routines in Figure 24 are provided below. I will explain it to you. The following describes how these routines achieve the objectives of the present invention. This is an overview of how the system will be integrated to achieve this goal.

The RAM data table 903 stores variables required by the control software. A block of memory used for These variables are Timer, status flag, switch input, analog data input, target pressure value, and target temperature value. A software timer is simply initialized with a specific value. is then decremented every 50 milliseconds by general purpose timer routine 252. It's just the content. Switch inputs can be placed on the control panel or on the various switches described elsewhere. is a digital input received from the The states of these switches are further detailed below. As described in , RAM data is stored so that unnecessary sensor wire operating conditions can be detected. data table 903. Status flags are software modules Opening certain conditions that affect the way a software module operates A memory word used by the software to start. For example, 1 Two status flags indicate whether the bed is transferred to the left, right or center. It is used for Status flags can be set to external inputs or some software timer. It can be changed depending on the timing from

Values received from pressure and temperature transducers and corresponding analog data is also stored in data table 903 in RAM. Also, the software The target pressure that is to be maintained and can be adjusted by operator input and The temperature is stored in RAM data table 903.

Upon receiving the above internal interrupt, the microprocessor 240 executes The first module to be added is the general purpose timer routine 252. This Luci The system decrements various software timers until a timed-out condition occurs. Sets certain situational flags that affect the behavior of the module. Next A switch processing routine 254 is executed which scans all digital inputs. . When a change in the digital input is detected, the appropriate switch function routine is activated. 284 is executed. As described below, these switch function routines: According to the type of change in the switch input detected, the data is stored in the RAM data table 903. Update data in .

After all digital inputs have been scanned, a rotation control routine 292 is executed.

Rotation control 292 controls valves 128, 130a and 130b, 132a and 13 2b, or which of 134a and 134b is open, closed, or its current state. Determine if it needs to be maintained in position. In order to make this determination, rotation control Routine 292 receives analog data from the pressure transducer, target pressure value and a status flag that tells the routine which target pressure value to use do. The rotation control routine 292 is read by the electric valve routine 316 at this time. Set the status flag. The electric valve routine 31B is actually a rotation control routine. According to the determination made by the engine 292, the valve chamber motor 138 is driven. these The determination is communicated to the electric valve routine 311i by a status flag.

Heater control routine 905 reads current values and data from RAM data table 903. and the target temperature value, compare them, and connect the heater wire 172 by digital output. turn on/off. The last module executed as part of the internal interrupt-driven loop The display writer routine 901 is the display writer routine 901. This routine outputs to the control panel Retrieve data from RAM data table 903 to be processed.

The display writer routine 901 then reads the control panel 346 according to the retrieved data. The bar graph display 356 is driven.

The analog input routine 904, indicated generally by reference numeral 800, is connected to a control box. 198 is internal and therefore not shown elsewhere. operates continuously according to external interrupts generated by the converter. Analog input loop Chin 904 retrieves data from analog-to-digital converter 800. , updates the appropriate location in RAM data table 903.

Next, with regard to FIGS. 15 to 20, the programming of the microprocessor 240 discuss the topic. As shown in FIG. 15, program initialization is indicated at 242. It will be done. Variable memory or RAM is cleared in step 244. internal Or the contents of all RAM variables are zeroed out before external interrupts are enabled. Similarly, the electrically switched ROM stored in The data required is initialized in step 246. Microp The data and command registers for the four 8-bit ports of processor 240 are At this time, it is initialized in step 248.

5 from a hardware interrupt timer internal to the microprocessor 240. The control software remains idle in loop 250 until a 0 ms interrupt is received. state. Microprocessor 2 (0 is microprocessor 24 at this time) 0 is the subroutine 252, 254, which is schematically shown in FIGS. 16 to 19. 292 and 316 are executed sequentially. General purpose timer subroutine 252 (first 6) is an electrically changeable ROM power “ON” delay timer before erasing; Audible alarm "ON" delay rOFFJ switching cardiopulmonary timer, audible horn pause timer and software-energized timers contained in RAM, including rotation timers. Decrement most of . The general purpose timer subroutine 252 includes the code shown in FIG. The first step 254 is the power on/off pushbutton. 851 (see Figure 14) has been switched to the "rOFF" position or the rest adjustment Tests to determine if button 728, 730 or 732 is activated. , that is, when the main power cord 218 (see Figure 12) is inserted into a power source (not shown). This step is required because loop 250 always operates at 50 millisecond intervals. . If these buttons 851 or 728.730 or 732 are activated If so, subroutine 252 continues with step 259A; The state of the timer is checked in step 256 and if the goal (0) has not been reached, , the timer is decremented in step 257 and if the target is reached, the rotation mode is activated. is advanced to the next sequential rotational phase and the timer is activated at step 258 on control board 3. 46 by the operator using one of switches 728, 730 or 732. is re-initialized by each time delay valve input by .

As explained below, the temperature setting switch 152 is a Used in conjunction with play 168 (see Figure 14), switch 152A or By pressing and holding one or the other of 152B, the air bladder bodies 321, 3 22. Set target temperature at 325 and 328 to increment or decrement counter This counter sets the target value every time a selected number of 50 ms pulses elapse. Increase the temperature by an increment (or decrease it by the same increment). if If switch 152A or 152B is activated by the operator, which A test is performed at step 259B to determine if the switch is activated.

If decay/decrement switch 152B is activated, step 259C is executed. The counter checks to determine if this count is the minimum count. It will be done. If so, the subroutine proceeds to step 259 and if so Otherwise, the counter is decremented in step 259D and subroutine 252 Continue to step 259. If the condition check in step 259B indicates a temperature rise increment If switch 152 indicates energized, the count returns to step 295E. A counter is checked to determine if the current value is at its maximum. If so If so, the subroutine 252 proceeds to step 259; if not, the The printer proceeds to step 259F, at which time subroutine 252 Proceed to step 259.

If the power "ON" delay timer is not 0 in step 259, then this The timer is decremented in step 260 until it reaches zero, and the subroutine is from the cardiopulmonary switching roFFJ timer for similar processing in step 261. Go to audible alarm “ON” timer. This timer is is reduced in step 262 and examined again in step 263.

If this timer still has not expired, the microprocessor 24 An alarm (not shown) at 0 is activated in step 264 if this If the timer has expired, the routine continues in step 265 with OK! ! Alarm suspension tie Proceed to Mar. If this timer has not expired, the timer will step 2 66 and examined again in step 267, if still If not, the alarm continues to be activated in step 268. then , the general purpose timer subroutine 252 is activated when the last timer is processed. Then, in step 270, the process returns to the control software (see FIG. 15).

A switch handling subroutine 254 is shown schematically in FIG. switch status, switches 226 and 228 in the air box, manual controls 361 (see Figure 14), the state of the switch (not shown), and the pressure sensor pad. monitors the status of head switches 221a and 231b. Switch processing subable The connector 254 is inserted from the connector from FIG. Assign a number to each input and process each numbered input in a loop. Book It will be apparent to those skilled in the art given the disclosure that other time intervals are equally suitable for testing the condition of the input. As may be understood, each input enters the state at 50 millisecond intervals in step 276. will be tested. The state of the switch is the state of the switch at that time in step 2. Tested by comparing the state of the switch from the last interrupt at 78. It will be done. If a change is detected, a switch malfunction is assumed and the next step The switch number is advanced in step 280 to process the switch input. too If no change from the previous switch state is detected, step 282 A switch position change test is performed and if a switch change is detected, A switch function is performed in step 284. If the switch has three states is constant throughout successive tests, the change in switch position will not be displayed and the The switch number is advanced in step 280 as previously described. switch number The number is compared with the limit number in step 286 and if it is less than the limit number at this time. If so, the switch number is advanced in step 285 and the above process continues. Iterated at step 288 for the assigned switch number. Step 28 The test in step 7 initializes the switch state at the same time as power-up. Determine whether the first pass is made at the switch. If so For example, the power-down memory is read in step 289 and the data is These switches stored in ROM, which can be changed automatically, are activated in step 283. Initialized to reflect the switch state at the time of the previous power-off.

The switch processing subroutine 254 processes the last switch number and returns to step It is activated upon returning to the control software at 290.

For each set of operator inputs to the control board 346, an individual switch function routine is provided. 284 is present.

In FIG. 14, the control panel 346 includes air adjustment switches 349, 350, 35 1, 352, 353, 354 and 355. air Adjustment switch 349゜350　, 351　, 352　, 353　, 354 and Each of 355 is actually a pair of buttons or rocker switches that control valve 1. 28.130a and +30b, +32a and 132b, 134a and 134b, air bladders 58.321.322.325 and 328 Raise and lower the target pressure obtained at These target pressures are stored in a memory location by processor 240. In the rotation subroutine described below, The target pressure is the valve! 28.130a and 130b, 132a and 13 By opening and closing 2b, 134a and +34b the software achieves and (or) used as a set point to try to maintain. The patient's head, right leg, right side of the body, 7 corresponding to the right shoulder, left leg, left half of the body, and left shoulder, left leg, left half of the body, and left shoulder. There are two target pressures.

Air adjustment switch 349, 350, 351, 352, 353, 354 and 355 correspond to each part of the patient's 348 body. In addition, the corresponding switch switches 628, 340, and 632 are placed on the control panel 346 at and left side (see Figures 10A, tOC, and 10D). ), resulting in a total of 21 target pressures. The microprocessor 240 is The expansion and contraction of the air sacs 58, 321, 322, 325 and 328 causes three The valve control commands are issued to sequentially and repeatedly achieve each of the rotations and positions of the valve. Each rotation position The positions are defined by seven target pressures corresponding to said positions. under normal conditions The target pressure is displayed on the bar graph display 3 above each corresponding air adjustment switch. 56. To change the target pressure, use the rotary position switch 628; 630 or 632 is pressed and the operator selects the patient whose target pressure is to be changed. Press the upper or lower air adjustment switch that corresponds to the person's body part. At this time, The switch function routine 284 increases the memory location in RAM that corresponds to this target pressure. Minutes or decrements. At the same time, the target pressure to be changed is is output to the corresponding bar graph 356. In this way, for each of the three rotational positions Each of the seven target pressures is defined by the operator.

Another switch function routine 284, similar to the one described above, allows the operator to 10A, 10c and/or Adjust the length of time that patient 348 pauses in each of the positions shown in Figure 100. allow to do. This pause time is the amount of time the timer routine decrements after each interval interrupt. The minutes are stored in the timer location. Pause times for center, right and left sides are , by pressing the pause adjustment buttons 728, 730, and 732, respectively. be done.

The switch processing routine 254 handles the height adjustment switches 233, 235, 236.2 37. When detecting operator input from 238 and 239, another switch machine A function routine 284 is executed. Switches 233 and 237 are respectively The frame part +4' of IO is raised and lowered, but the switches 236 and 239 are The frame portion 14'' is raised and lowered, respectively.

Switches 235 and 238 raise and lower the entire frame 12 of bed 10, respectively. let The switch function routine that executes when one of these switches is pressed is , causing the actuation of the power screw described above to effect the appropriate height adjustment.

Similarly, another switch function routine 284 connects the air bladders 321, 322, 3 operating temperature at which the air supply to 25 and/or 328 is to be maintained. Allow data to adjust. The target temperature is determined by the microprocessor 240. It is used as a set point for the control of strip 172.

The target temperature is adjusted using switches +52A and 152B. Digital display 168 is software driven.

Rotation subroutine 292 is shown in FIG. This routine uses a general purpose timer - Subroutine 252 adjusts appropriate software timers to drive the bed. After determining the rotational position to be placed or held, the can be put in. Subroutine 292 includes valves 128, 130a and 130b, 132a and +32b, +34a and +34b, and the patient 348 from one side of the bed frame 12 to the other. by 76, 78, 80 and 82 and 76°, 78°, 80° and 82°. Two sets of air bladders supplied with air are alternately inflated and deflated. to step 296 A specific valve number is read out. Next, for this particular valve configured as above: The target pressure for is read out in step 300. In step 308 , individual valves 128.130a and! 30b% 132a and 132b, or 134a and 134b are the potentials also read in step 300. It may or may not be adjusted according to the output signal of the yometer 468. potentio Meter 468 provides a voltage value for analog-to-digital converter 474. This converter converts the voltage into adjacent parts 14°, 14@, 14°” or 14@” portion of bed frame 12 14”, 14”, 14° Convert said voltage into a digital value representing a displacement angle of "or 14". For example: , when section 14° of frame 12 is pivoted relative to section 14'', as explained below. As shown, the air bladders 321, 322, 325 and/or 328 are supported. The weight distribution of the held patient's 348 body is changed. Therefore, the microprocessor Sensor 240 adjusts the target pressure to compensate for changes in weight distribution.

In FIG. 13, two adjacent frame portions 14° and 14" are attached to the butterfly plate 4. Shown joined by 4 degrees. Bracket 462 is attached to bolt 464 potentiometer 468. The bracket is mounted so that its shaft 467 freely rotates throughout its operating range. 462. Potentiometer 468 and butterfly plate 44° axis 4 67 are arranged so that their rotational axes are aligned.

The shaft 467 of the potentiometer 468 is supported in the frame part 14°.

When frame portion 14'' is pivoted relative to portion 14°, connector 470 similarly is rotated to cause rotation of shaft 467 of potentiometer 468, resulting in rotation of the frame 467. The output of potentiometer 468 is proportional to the displacement angle between the 14° and 14” Causes a change in voltage. This change in the output results in a signal, and this signal is sent to microprocessor 240 by wire 472 (see FIG. 12).

The output signal of potentiometer 468 is approximately 15° from the horizontal of frame portion 14'. on substrates 48 and 50 until a maximum angle of 45° from the horizontal is reached. The pressure within the supported pair of air bladders is increased by approximately 20% over the reference pressure. adjusted accordingly.

Valves 128, +30a and 130b, 132a and 132b, and 13 The screw shaft 139 of the electric motor 138 that opens and closes 4a and 134b is and valves 128, 130a and +30b% 132a and +32b, or 1 The theoretical pressure at each fitting 153 of 34a and 134b is determined in step 302. When calculating, the time it takes for the electric motor +38 to rotate is As used, the specific valve 128%13 rotates very slowly 0a and 130b, 132a and 132b, or 134a and 134 The actual pressure from the air test unit 212 corresponding to b is read out in step 304. be done. The pressure from the air inspection section 212 is transmitted to the control box 19 via the air pressure line 213. to a pressure drain juicer (not shown) attached to 8. This pressure driver The juicer is approximately 0 to 0.0703 kg/cta' (0 to 1 psig) (Freeponite, Illinois, USA) in a format suitable for reading pressures within the range of Microswitch Inc. and 5ensy Inc., Sunyville, Calif. available from ). This pressure drainer is then powered by a microprocessor 240 input to the control box + 98 specific analog/digital converter A voltage proportional to the pressure is manually generated. Next, in step 306, the actual pressure is compared to target pressure.

A determination is then made as to whether the valve should be held, closed, or opened. , causes the valve type motive subroutine 316 to perform the appropriate actions as described below. This is realized in step 308a, 308b or 308c.

After executing step 308, valves 138, 130a, Jl-130b, 132 Air pressure at joint +53 of a and +32b, and 134a and 134b A display of force in bar graph 356 is provided. The operator presses switch 628 , 630 or 632 (see Figure 14) is energized. Select whether to display the actual pressure or the target pressure in step 310.

Actual display data is calculated in step 212 and in step 314. and is output to the bar graph 356. If switch 628, 630 or 632 When one is energized, the target display data is displayed in step 315 as before. is calculated and output in step 314. Next, the rotation subroutine 29 2 is energized at connector 298.

1 and 14, the auxiliary control panel 850 includes pushbutton switches 8 Mounted on the leg board 21 on which 51, 357, 358.852 and 853 are placed. I'm being kicked. Push button 851 is a 0N10FF switch for the main power supply.

Pressing the pushbutton 358 activates the patient therapy module which rocks the low air loss board 10. the microprocessor 240 is placed in the previously programmed It advances sequentially to the rotational position. When push button 358 is pressed, board lO in air support therapy mode, i.e. the two shown in Figures 10A and 10C. The inversion of patient 348 is stopped at a position somewhere between the extreme positions of . push button 8 Pressing one of 52 or 853 causes microprocessor 240 to move the boat forward. hold in one of the programmed left or right flip positions.

The valve type motive subroutine 316, shown schematically in FIG. Valve chamber motor operation generated by closing and rotating subroutines 254 and 292 The motion command is used to operate the valve chamber motor, that is, the valves 128, 130a, 130b, 132a. and 132b, and used to open or close 134a and 134b. Converts to starting, braking, coasting rotation and reversal of each electric motor @138. valve type actuator Machine subroutine 316 is entered at connector 318. Each electric motor +38 At step 320, a number is assigned and its required state, i.e., operational. or stop and in the direction compared to the current state in step 370. will be tested. Whenever the running electric motor 138 is required to stop, this electric motor The state of the motive is tested in step 372 and if stopped or stopped. If so, the brake timer is tested in step 374 and the brake Determine whether the timer is zeroed. If the brake timer is not zeroed, If so, the brake timer is decremented in step 376 and the brake timer is decremented in step 378. and then tested again to determine if the brake timer is zeroed. If so If so, the brake is released in step 380 and the motor 138 is The number assigned to the motor is compared to a limit number in step 382 to It is determined whether machine 138 is the last electric motor. If the state of motor 138 is If rotating at step 372, motor +38 is turned off and the brake is turned off. key is set in step 388 and a timer is then set in step 390. is initialized. If motor 138 is not the last motor, the motor timer is reduced in step 386 and the above process is repeated.

Returning again to step 370, if the condition of the tested motor 138 is If the motor 138 is to operate, the state of the motor at that time is step Tested at 392. If the state of motor 138 under test is 8 has stopped or is about to stop, the required state and its The states of the motors at are compared to determine If the requested state and the current state are not the same For example, the second shift timer is tested and the brake timer is zeroed at step 396. Determine whether or not. If the brake timer is not zeroed, the brake timer The number assigned to this motor 138 is decreased in step 398. motor 138 is tested in step 382, and this motor 138 is the last motor. Determine whether the If motor 138 is not the last motor, the motor The timer is decremented in step 386 and the process described above is repeated.

If the brake timer is zeroed in step 396, the motor +38 The direction of rotation of the motor 138 is reversed in step 400 and the motor 138 is rotated in step 402. and the motor rotation timer is initialized in step 404. , the number assigned to this motor +38 is tested in step 382. It is determined whether this electric motor 13B is the last electric motor. If electric motor +38 is not the last motor, the motor timer is decremented in step 386. , the above process is repeated. If the requested state and the current state are If the same at 394, the motor 138 is turned on at step 402. The motor rotation timer is initialized in step 404, and the motor rotation timer is initialized in step 404. The number assigned to 8 is tested to see if this motor + 38 is the last motor. judge whether If motor 138 is not the last motor, motor type The mer is reduced in step 386 and the process described above is repeated.

Returning to step 392, if the current state of motor +38 is If it is in operation, the required state and the current state are step A comparison is made at 406 to determine if they are the same. If requested If the current state is not the same as the current state, the motor 138 is switched off; The brakes are set in step 388 and the brake timer is set in step 390. , and processing continues as above. If electric motor +38 is requested If the current state and the current state are the same, the motor rotation timer returns to step 408. is tested to determine whether the rotation timer is zeroed. If times If the rotation timer is not zeroed, the motor rotation timer is reset in step 41. is decremented and tested again in step 412 to zero the rotation timer. Determine whether the If so, the motor +38 goes to step 414. The number assigned to motor +38 is compared with the limit number and motor 1 is turned off. 38 is compared with the limit number in step 328, and motor 138 is the last motor. , and processing continues as described above. If the rotation timer for motor 138 if zeroed in step 408 or 412. The assigned number is compared to a limit number in step 382 to is the last motor and processing continues as above.

The power failure interrupt subroutine 416, shown schematically in FIG. electrical power, or when a board with low air loss is unplugged. Some controllers such as blower and rotation mode status in ROM can be changed to Write morphological parameters. The power failure interrupt subroutine 416 includes Entered upon receipt of an interrupt from a hardware interrupt (not shown).

If the electrically changeable ROM power-on delay timer (EEROM) timer) is zeroed in step 418, i.e. if the air loss Small board 10 allows electrically changeable ROM to be used for writing If powered on for more than a few seconds, the above parameters are set in step 420. before being stored in memory and returned to the code before the interrupt in step 424. An EEROM timer is initialized at step 422. If the EEROM If the timer is not zeroed in step 418, a board with low air loss The IO is probably powered on, and the memory cannot be used for writing. I can't. The control software (see Figure 15) generates and notes a power failure interrupt. writes to the software, but does not actually cut off the power to the control software. If a power interruption is received, the power failure interrupt subroutine 416 interrupts the EEROM timer. After the EEROM timer has partially timed out again, the memory can be used to rewrite the data.

As mentioned above, the frame 12 is hinged at 44°, 44° and 44° to the substrate 4. 6 and 52 to allow them to be raised from the horizontal and for the comfort of patient 348. change the angle of inclination for medical or therapeutic purposes. However, in particular, the head board 52 When the patient 348 is lifted, the displacement from horizontal causes an imbalance of the patient 348 on the air bladder 322. The body weight portion will be placed against the leg base plate 48 and the living base base 50. of the present invention In the presently preferred embodiment, there are only three air bladders 322 and one substrate 48. and 50, resulting in portions 14°, 14”, 14°” and and 14" are all in the horizontal plane, two of the air bladders 58.322 and 328 A large portion of the patient's weight that is distributed over 0 or more air sacs 322 Concentrated on 6 crabs. Pressure sensor pad switch 331a and 231b (see FIG. 14) is placed flat on the leg substrate 48 and the live portion substrate 50, and Even a part of the body of the resultant part is connected to either of these switches 231a or 231b. If the operator touches the It can be stopped by energizing the switch 347 by the The air pressure within the placed air bladder 322 can be increased by the operator. Ru.

FIG. 12 shows a low air loss base constructed in accordance with the teachings of the present invention. A schematic wiring diagram of the head is shown. The alternating current enters the circuit from wire 218, and this wire is coupled to a power distribution circuit board 219. Power distribution circuit board 219 distributes power to microprocessor 24 via cable 211 and solid state relay. 0 to control each blower 108 and heater 172; Contains 0. The power distribution circuit board 219 is connected to the junction box 224 of the bed circuit 43. The lead wire 223 allows the frame 12 of the bed lO with small air loss to be raised and lowered. Power is supplied to an electric motor (not shown) in box 45 for positioning.

Power distribution circuit board 219 also powers motor +14 of blower 108. Each Bro A capacitor 236 is provided on the blower 108, and a capacitor 236 is provided on the control panel 346. The connection provided by cable 243 to switch 241 of A switch +92 is provided for deenergizing one of the 108.

According to FIG. 14, a temperature sensor indicated schematically at 194 is placed on the live area manifold. It is placed at 80. Switch 152A or 152B and display 16 The target temperature set by the oberator using 8G is heating strip 172 is activated by microprocessor 240 when the air temperature is lower than the air temperature. turned on. The heating strip 172 is connected to a main power module 220 (see FIG. 12). Current is given by wires 167 tatami and 167°. The screen on the control panel 346 Switch 191 is used to energize or de-energize heating strip 172.

Limit switches 226 and 228 are located on manifold plate 145 and complete, respectively. It is provided on the full expansion plate +44 (Fig. 4, Fig. 8, Fig. 9A and Fig. 14). reference). The limit switch 226 is closed when the push button 230 engages the dump plate. be done. The pushbutton 230 releases the manifold of the dump plate 150 under the action of the lever 165. When released by movement away from field plate 145, the circuit is opened and blower 1 08 is blocked. The limit switch 228 is connected to the fully expanded plate 144 by screws 232. When the lever 234 engages the manifold/L7 plate 145, the circuit will be held.

When the full expansion plate +44 is opened under the action of the full expansion knob 193, the limit switch 228 is closed, blower 108 and microprocessor if not already on. Both buzzers included in 240 are energized. Switch 347 is.

It is provided on the control panel 346 to stop the buzzer.

Control board 346 is connected to controller 198 by ribbon connector 200. It is. Controller 198 includes microprocessor 240 and other necessary Contains circuit.

Controller 198 includes cables 108.211.225.227 and 22 A plug-type outlet 205 is provided for receiving the plug 207 of 9. Ru.

The cable 208 connects the controller 198 to the temperature sensor! 94 and pressure sensor It is connected to the pad switch 231. Cable 211 is a direct power distribution circuit for connecting with plate 219 and controlling the functions of blower 108 and heating strip 172; Power is supplied to the controller while sending control signals to power distribution circuit board 219 . cave The wires 170a and 170b include individual wires 184i and 184i for each motor 138. and +84°, which sends low voltage DC current to each motor 13B. . Cable 170a also has cables for limit switches 226 and 2281, respectively. Individual wires 2261 and 226o, and 228I and 2 that connect individually The angle is 28°.

The cable 227 has a plug 359 and an engagement plug on a separate manual control 361. 360 and the other end from the plug 207 is provided for engagement with the control panel 346. The functions of the switches 349 to 358 overlap. Manual control section 361 is simply a keyboard. Attacks that overlap in functionality with code 346 are shown schematically in FIG. P Lugs 359 are provided on both sides of the board frame 12 (not shown in Figure 14). ), manual controls 361 facilitate access for hospital personnel.

Cable 229 is provided with plugs 364 and 366 to engage with each other. Plugs 362 and 363 are provided at the other end from the second plug 207 .

Plug 364 is connected to circuit box 43 (see FIG. 7), which is shown schematically in box 367. It is arranged in the circuit of the board frame 12.

Plug 366 is located in a manual control, schematically indicated at 368, which The functions overlap with those of switches 233 and 235-239 on panel 346. manual control 368 to adjust the inclination angles of the base plates 54 and 46 of the head and foot parts, respectively. When adjusting the The signal sent directly to circuit 367 of board frame I2.

Although the present invention has been described with reference to preferred embodiments in the text, the description in the text is simple. This description is provided for the purpose of explanation and should not be considered as a limitation of the present invention. and its scope is limited only by the mating claims.

r■0-4 □ FIG.-12 Engraving (no changes to the content) Engraving (no changes to the content) Engraving (no changes to the content) Engraving (no changes to the content) Engraving (no changes to the content) Procedural amendment March 4, 1989 Yoshi, Commissioner of the Patent Office 1) Takeshi Moon 1.Display of the incident PCT/US88101861 , name of invention Method and apparatus for varying pressure in a patient support system with low air loss 3. Person who makes corrections Relationship to the incident: Patent applicant address Name: Kinetic Concepts Incorporated 4, Agent Address: Shin-Otemachi Building, 206-ku, 2-2-1 Otemachi, Chiyoda-ku, Tokyo International search report as per Sat (there is no change in the content of the document mentioned in (3) above)

Claims (2)

[Claims] 1. frame and a first set of air bladders for placing a patient supported laterally on the frame; and, a second set of air bladders for placing a patient supported laterally on said frame; body and means for coupling each of the air bladders to a gas source; on each air bladder of the first set of air bladders, wherein the air of the first set of air bladders is When the bladder is inflated, move the patient placed towards the first side of the frame. and means for on each air bladder of the second set of air bladders, wherein the air of the second set of air bladders is When the bladders are inflated and the bladders of the first set of bladders are deflated, the flap means for moving a patient placed toward a second side of the frame; on the air bladder body, and the patient is placed in the first or second position of the frame, respectively. placed on the air bladder of the first or second set when moving toward the side; a means of holding the patient; means for measuring pressure in each of the first and second sets of air bladders; means for adjusting the pressure in each of the first and second sets of air bladders; means for storing a target pressure value; said first by energizing said regulating means according to a previously stored target pressure. and means for controlling the pressure in each of the second set of air bladders; and said frame. changing the target pressure sequentially to produce a rocking movement of the patient between the first and second sides of the and the means to A bed with small air loss. 2. means for pivoting portions of the frame with respect to adjacent portions; means for detecting a displacement angle of said frame portion; and a means for detecting a displacement angle of said frame portion; and means for adjusting the previously stored target pressure. equipment.