RU2520041C2 - Patient lift trolley - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment. A patient lift trolley accommodates a wheeled frame, a drive-connected shaft mounted on the frame and having a pair of rigidly connected levers pivotally connected by support brackets to a handbarrow. The handbarrow is presented as flat lodgements movable, e.g. rotatable about a vertical axis, and mounted on supporting arms locked from rotation about long axes and arranged symmetrically from a long axis of the handbarrow on two bearing beams with a possibility of being fixed in any position along the bearing beams. The beams are formed of several joints rotatable and fixed in any position of one part in relation to the other one. The support brackets rigidly connect middle sections of the bearing beam joints, and the frame is provided with a folding step.

EFFECT: invention enables decreasing the width of the handbarrow and lift trolley.

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Description

The invention relates to medical equipment and allows one person to lift a patient from a bed or from an operating table, move and lower him on an operating table or bed, transfer a patient from a lying position to a sitting position, lower a patient over a bathtub, use the device at home.

A device for lifting and transporting patients [1] is known, comprising an electric cart mounted on it with a telescopic frame hoist that can be rotated about a vertical axis, and stretchers equipped with elastic tapes that can be rotated about a frame around a horizontal axis. The disadvantage of this device is that the elastic bands come unfastened from the stretcher, after laying the patient on the bed, and must always be under it, which makes the patient uncomfortable. Being a relatively large-sized vehicle, the device cannot be used in tightly-packed hospital wards.

Known trolley for transporting patients [2], containing a lifting platform mounted on the chassis, on which a bed is installed through a system of levers, which is an endless belt in the transverse direction. The bed with the lifting platform is coordinated in height with the bed or the operating table and the system of levers is fed at an angle to the patient who is lying on his side. Then the patient is laid on the edge of the bed and pushed by someone from the medical staff when the transverse endless tape is turned on, moves to the middle of the bed. Then the bed is moved by a system of levers to the trolley and the patient is transported to the desired location. The transfer of the patient from the bed to the operating table or bed occurs in the reverse order. The disadvantage of this trolley is that the transverse movement of the bed is carried out by two rather complex mechanisms, and the bed itself is a device difficult to manufacture. The transfer of the patient should be carried out by at least two members of the medical staff, someone must keep the patient on his side, and someone let the bed down. And in the case when the bed is against the wall, keeping the patient on his side is generally problematic, since the approach to the patient is limited.

Known trolley-lift for patients [3], containing a frame in the form of telescopic racks on wheels, lower and upper frames connecting the racks, a bed connected to parallel levers mounted on the upper frame and connected to a self-locking drive, and a latch mounted on the upper frame. The trolley-lift is fed into the ward and is installed parallel to the patient's bed. Then the upper frame rises along the telescopic racks to the level of the mattress and is fixed with a latch to the bed, after which the bed is driven by the drive onto the mattress, and the patient is turned on its side, making room for the feeding bed. After feeding the bed, the patient, turning on his back, is moved to the bed and then driven to the trolley itself, after which, after unlocking it, the patient is transported to the desired location. The patient moves from the cart to the bed in the opposite direction. The movement of the patient to the operating table and back is similar.

The disadvantage of the design of this trolley is that the vertical movement and horizontal movement of the bed in this trolley is provided by two different mechanisms, which is quite difficult in itself. The latch, which ensures the stability of the trolley during lateral movement of the patient, is a very complex and problematic unit in the presence of different designs of beds and designs of operating tables that differ from the designs of beds. In addition, there should be a device that blocks the lateral movement of the patient, with an unsecured cart. The drawback of the design of this trolley, as well as the trolley described above for transporting patients, is also the fact that it is impossible to move the patient from the bed on the bed and vice versa, and also, if the bed is located on the wall, it is problematic to keep the patient on his side while feeding his bed.

Known trolley-lift for patients [4], containing a base on wheels, mounted on the base and connected to the drive shaft with a pair of rigidly connected levers, a bed (stretcher), made in the form of separate movable, for example, flat elastic, rotatable around the vertical axis lodges with the ability to fix in at least two positions and fixed at the ends of the movable brackets, and the brackets are made, for example, in the form of brackets and installed with the possibility of fixing in any position along the supporting beam, hinged about connected to levers. This trolley-lift allows you to provide patient care when moving it from the bed (operating table) to the bed (stretcher) and vice versa from the bed (stretcher) to the bed (operating table) by one person.

The disadvantage of this trolley is the relatively large dimensions and weight. Large dimensions are determined by the fact that the distance between the lodgements of the shoulders, when feeding the bed (stretcher) to the bed, should be greater than the width of the shoulders of the patient, as well as the fact that when transporting the patient in the supine position, the length of the trolley is determined by the growth of the patient. A large weight arises due to the fact that when lifting the patient from the bed, so that the trolley does not roll over in the transverse direction, it is necessary to balance the patient and the stretcher with something, either by the weight of the trolley itself or by the installation of balancing weights on the second lever arm, as indicated in the second paragraph formulas for the invention of this trolley, since the latch holding the trolley in the transverse direction seems, as mentioned above, to be a very complex and problematic unit.

The objective of the invention is to reduce the dimensions of the trolley with the patient in the transport position in width and length to sizes that allow its use at home, ensuring that the stretcher with the patient is lowered onto a special stand over the bathtub and the cart is reduced in weight.

This task is achieved by the fact that in the known trolley for patients with a base on wheels mounted on the base and connected to the drive shaft with a pair of rigidly connected levers pivotally connected by brackets, for example in the form of brackets, with stretchers made in in the form of movable, for example, rotatable around the vertical axis, flat lodgements mounted on brackets mounted with the possibility of fixing in any position along the supporting beam, the brackets are mounted symmetrically longitudinal the axis of the stretcher on two load-bearing beams with fixing the brackets against rotation relative to the longitudinal axes of the load-bearing beams made articulated from several parts, with the possibility of rotation and fixing in several positions of one part relative to the other, the middle parts of the load-bearing beams are rigidly connected by brackets, for example, in the form of brackets, by which the stretcher with levers is hinged and the base is equipped with a folding footrest.

Figure 1 shows a trolley, a side view in a transport position;

figure 2 is a rear view of the lift truck in a transport position with conventionally removed parts of the bearing beams (bars) under the back and legs, as well as indicating in thin lines the position of the stretcher and the patient, lowered into the bath;

figure 3 is a side view of the initial position of the trolley before lowering the stretcher on the bed with the patient;

figure 4 is a rear view of the trolley-lift after lowering the stretcher on the bed, laying the patient on the lodgement of the stretcher, before lifting the stretcher with the patient on the trolley itself;

figure 5 is a top view of a stretcher with the patient laid on toolboxes;

figure 6 is a side view of the trolley-lift with the patient raised to the trolley in a lying position;

Fig. 7 is a rear view of the trolley lift with the patient raised to the trolley in a lying position.

The lift truck contains a base consisting of a platform 1 (Fig. 1), wheel supports 2, struts 3 with hubs 4, inclined struts 5, spacers 6, crossbars 7 (Figure 2), jumpers 8 and rods 9, rigidly connected through brackets with uprights 3 and cross members 7. A jack 11 is fixed to the rods 9 through brackets 10 (Fig. 7), the screw of which 12 is clamped in the cartridge 13 of the electric screwdriver 14 used as an electric drive. An electric screwdriver 14 with a clamp 15 is mounted on a beam 16 mounted on the hubs 4. On the racks 3 on one side of the trolley brackets 17 are mounted on which a frame19 is pivotally mounted through the axis 18 (Fig.6), pivotally connected to the footboard 20. Slider 21 (Figure 2) the jack 11 through the connecting rod 22 is connected to a lever 23, which is rigidly connected with the shaft 24 mounted on the hubs 4. On the shaft 24 the levers 25 are rigidly fixed, which are essentially jumpers 26 (Figure 1) are combined into a single structure. The levers 25 (Figure 2) are pivotally connected through hinges 27 to brackets 28, which are rigidly connected to the carrier beams 29, which are pivotally connected to the rods 30 of the back and to the rods 31 of the legs. The rods 30 are fixed in several positions relative to the supporting beams 29 with latches 32, which mesh with the tooth sectors 33, mounted on brackets 34 mounted on the supporting beams 29. The latches 32 are controlled through rods 35 by the handles 36. The rods 31 are fixed relative to the supporting beams 29 with latches 37 meshing with the gear sectors 38, mounted on the supporting beams 29. In the lowermost position of the bar 31 legs rest against the ends of the supporting beams 29. In the lowermost position of the rod 30 of the back (Fig.6) also abut against the ends of the carrier beams 29. On the rods 30 (Figure 5), tool holders 39 are installed under the head, mounted on brackets 40, pivotally mounted on brackets 41 movable along the rods 30, lodges 42 under the shoulders on brackets 43 movable along the rods 30 and 44 lumbar supports on movable along the rods 30 brackets 45. In the zone of movement of the brackets 41 and 43, the rods 30 (Figure 4) are in cross section the shape of a hollow triangle, which is necessary for placement on the stretcher of the patient’s shoulders, and in the zone of movement of the brackets 45 (Figure 5) the shape of the hollow square that prevents the rotation of movable x brackets, and, accordingly, lodgements, around the longitudinal axes of the rods 30. On the supporting beams 29, lodgements 46 are installed under the buttocks of the patient and lodgements 47 under the hips of the patient in the knees. The lodges 46 and 47 are fixedly mounted with the possibility of rotation around the vertical axis relative to the supporting beams 29, since to support the patient’s thigh, the support can be at the same distance from the support under the buttocks for patients of different stature. Lodges 46 under the buttocks are made stationary, because they are the basic supports, since the axis of rotation of the rods 30 (Figure 1) should approximately coincide with the conditional axis of the patient's hip joint. On the rods 31 (Figure 5) also motionlessly along them with the possibility of rotation around the vertical axis are installed lodgment 48 legs of the patient. The leg support point (Figs. 1 and 6) for patients of different growths can be at the same distance from the buttock supports. Under the patient’s feet, movable lodgements 49 are installed on the rod 31 (Figure 5). Since the patient (Figure 1) can rely on the lodgements 49, they are fixed with nuts 50 on the screws 51 installed in the supports 52 and fixed on one of them with nuts 53. Depending on the growth of the patient, the position of the lodgment 49 can be adjusted with nuts 50. The adjustment of the position of the lodgment 39 (FIG. 5), 42 and 44 is achieved by simply moving the movable brackets 41, 43 and 45 along the rods 30 and fixing the brackets with the stops 54 (FIG. 1).

Lifting and moving the patient using this trolley-lift is as follows.

In the initial position (Figure 3), the trolley is located on the side of the bed with the patient so that the buttocks of the patient are opposite the axis of rotation of the lodgment 46. The rods 30 and 31 of the back and legs are raised to a vertical position, all lodgment, except the lodgment 49, are rotated along the rods 30 and 31 and along the supporting beam 29, the footboard 20 is lowered to the floor and the frame 19 rests on the platform 1. The service person (hereinafter the operator) stands on the footboard 20 (Figure 4) and includes an electric drive 14, which rotates the screw 12, and the slider 21 from the position depicted in FIG. 2 or FIG. 7 , goes into the position shown in Fig. 4, while turning through the connecting rod 22, the lever 23, which through the shaft 24 turns the levers 25, thereby lowering the stretcher on the bed. Since the rods 30 (Figure 3) and 31 are raised, the stretcher is lowered onto the bed in the region of the patient's pelvis and hips, which allows the distance between the supporting beams 29 (Figure 2) to be made smaller than it would be if the stretcher was fed in the region of the shoulders . After the stretcher is lowered onto the bed (Figure 4), the rods 30 (Figure 3) and 31 are rotated to the horizontal position by the operator, as in Figure 6. When turning in turn the bars of 31 legs, it is necessary to raise each leg in turn at the knee to raise supports 49 past the patient's feet. When turning in turn the bars 30 of the back, it is necessary to half-turn each shoulder of the patient in turn to pass the bars behind the patient's back. Then (Figure 5), by alternately turning the lodgment 39, 42, 44, 46, 47 and 48 and alternately lifting the parts of the patient’s body, the patient is transferred from the bed to the stretcher, after which the operator stands on the folding step 20 (Figure 4) and turns on the electric drive 14 in the opposite direction. The slider 21 (Fig.7), also moving in the opposite direction through the connecting rod 22, the lever 23, the shaft 24 and the levers 25 raises the stretcher with the patient on the trolley. The tipping line of the trolley (Figure 4) in the transverse direction is the line of wheels 2 located in the opposite position from the folding footrest 20, on which the operator stands. The ratio of restoring weight to tipping weight is approximately 2.4. That is, an operator weighing 75 kg will balance a stretcher weighing 30 kg and a patient weighing 150 kg (a total of 180 kg). 150 kg - the maximum weight of the patient, 75 kg - the average weight of an adult.

After lifting the patient to the trolley (Fig.6) and lifting the steps 20 in the transport position of the patient can be transported in a lying position. At home, it is certainly more convenient to transport the patient in a sitting position, for which the operator should, having come from the side of the patient’s head and grasping the ends of the rods 30, thereby pressing the handles 36, at the same time raise the same angle of the rod 30 (Fig. 1 ) Then, moving to the legs, the operator alternately disengages the latches 37 from the meshing with the tooth sectors 38 and lowers the rods 31 to the ends of the load-bearing beams 29. Thus, the patient is in a transport position while sitting. As a rule, in bathrooms there are washbasins and washing machines with a height of up to 800 mm. Therefore, the height of the patient’s seating should exceed this size to ensure check-in and possible turns of the trolley in the bathroom. As a result of this, before entering the bathroom, it is necessary to raise the leg rods 31 to a horizontal position. In the bathroom, put the cart with the patient on the side of the bathtub, give the back bars 30 the maximum vertical position for placing the patient in the bathroom in length, lower the footboard 20 to the floor and lower (Figure 2) the stretcher into the bathroom on a special stand (image in thin lines ) The swivel connection of the levers 25 with the stretcher is made quick, therefore, by disconnecting the levers 25 from the stretcher and lifting the footrest 20 into the transport position, the trolley can be taken out of the bathroom, leaving only the patient on the stretcher in the bathroom, thereby providing better access to the patient for his care . The patient is lifted onto a trolley, transported and laid on a bed in the reverse order.

Thus, the introduction of articulated load-bearing beams into the device of the stretcher with fixing their parts relative to each other and fixing the brackets of the lodgements from turning them relative to the longitudinal axes of the load-bearing beams makes it possible to reduce the dimensions of the trolley in width (not more than 580 mm) and in length when transporting the patient in a sitting position, makes it possible to lower the patient over the bath and slightly reduces weight due to a decrease in width. The introduction of the folding steps using the weight of the operator clearly solves the issue of lateral stability of the trolley with a sharp decrease in the weight of the trolley.

The base has two pairs of hubs 4 (Figure 2). The second pair of hubs is used when approaching the patient on the bed on the other, left side. In this case, the frame 19 with the step 20 on the brackets 17 and the jack 11 with the slider 21 and the connecting rod 22, and accordingly the bracket 16 with the clamp 15, and the levers 25 with the shaft 24 and the lever 23 are also reinstalled. relative to the cart do not change.

In order to prevent raising and lowering of the stretcher when the footboard 20 is not lowered to the floor, a visor is installed on it, blocking the power button 14 in the transport position of the footboard 20 (not shown in the drawings).

To reduce the patient’s landing height in the walking version of the trolley, it is possible to reduce clearance by introducing a suspension of wheels or an additional mechanism for turning the upper part of the trolley relative to the platform. When using the trolley in medical institutions and at home, the introduction of additional mechanisms that make the trolley heavier and more expensive is inappropriate, according to the author. The weight of the trolley in this embodiment, without the use of aluminum and titanium alloys, does not exceed 80 kg.

Information sources

1. A.S. No. 946541 USSR, IPC A61G 7/10 dated 07/30/82. Bull. No. 28.

2. A.S. No. 1616660 A1 SU, IPC A61G 3/00 dated 12.30.90. Bull. No. 48.

3. A.S. No. 1777863 A1 SU, IPC A61G 7/10 dated 11/30/92. Bull. No. 44.

4. Patent RU 2364384 C1, IPC A61G 7/10 of 08.20.2009. Bull. No. 23 (prototype).

Claims (1)

A trolley for patients, containing a base on wheels, mounted on the base and connected to the drive shaft with a pair of rigidly connected levers pivotally connected by brackets, for example, in the form of brackets with stretchers, made in the form of movable, for example, rotatable around a vertical axis , flat lodges fixed on brackets fixed from rotation relative to the longitudinal axis of the beams, which are mounted symmetrically with respect to the longitudinal axis of the stretcher on two load-bearing beams with the possibility of their ixation in any position along the bearing beams made articulated from several parts, with the possibility of rotation and fixing in several positions of one part relative to another, characterized in that only the middle parts of the articulated bearing beams are rigidly connected with brackets in it and the base is equipped with a folding foot .

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