JPS61164564A - Automatic solution injector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The invention relates to an automatic injection solution injection device.

In particular, the present invention provides for relatively constant,
The present invention relates to an injection device that can perform injection at a constant and predetermined rate by supplying at a pressure of .

(Conventional Technology) In the medical field, it is often necessary to deliver various fluids into the body of a patient. Two techniques are commonly used, and these techniques can be used under different circumstances. Harmful effects are occurring.

In the first technique, the injection solution is filled into a conventional syringe and administered to the patient in a single injection through a hypodermic needle. -As an example, this technique may be used to administer insulin to diabetic patients. However, from the perspective of medical science, it has been considered preferable to administer drug solutions at a slow rate over a long period of time, rather than administering various drug solutions in a single injection.

(Problems to be Solved by the Invention) In recognition of this, a second technique has been proposed that has a wide range of practical applications for administering medicinal solutions to patients.

Liquids such as saline solutions, blood plasma, and sputum can be administered to a patient by inserting a needle into the patient's body and suspending the vial or bag of solution above the patient's level. In this way, the solution is injected into the patient under positive pressure through a flexible tube that connects the bottle or bag and the needle. For example, the containers for these injections should be placed 2 times more than the patient.
The device is raised 61 to 3 feet above the patient or suspended from a post fixed to the patient's bed. This technique has the obvious disadvantage of restricting patient movement.

In the emergency treatment of trauma patients, it is often necessary to administer intravenous solutions to the patient at the scene of the accident or while transporting the patient to a medical facility. The container must be lifted (higher than the patient), so hang the container (
Without the means, trouble often arises. for example,
Medical personnel must be present with the patient to hold the intravenous container at the appropriate height. It is difficult to keep intravenous bottles in place in ambulances, helicopters, and similar medical vehicles. Changing the height of an intravenous bottle that is higher than the patient will affect the fluid pressure head. Therefore, the flow rate of solution to the patient changes. Hold up the intravenous (IV) bottle (
To obviate this need, various devices have been proposed to pressurize flexible intravenous bags with gas or mechanical force. The pressure on the intravenous solution decreases, resulting in a decrease in the pressure on the intravenous solution.
This pressure drop is similar to the problem previously discussed due to variations in the height of the bottle above the patient. To solve this pressure fluctuation problem, some known intravenous fluid lateral pressure devices are equipped with a squeeze valve. This squeeze valve must be manually operated to increase the pressure on the intravenous solution bag as the intravenous solution exits the bag. Other known intravenous solution pressure devices utilize a pressure regulator to control compressed gas delivered from a compressed gas source to maintain a constant pressure on the intravenous bag. However, the use of equipment such as pressurized gas sources and pressure regulators adds cost and complexity to the intravenous injection device. Therefore, the machine often breaks down.

The prior art described above is described in the following patents:

Lundhaug, U.S. Pat.
No. 123 discloses a pressure injection device having a pressure sealed container connected to a source of compressed gas and a collapsible injection bag housed within the pressure container. The pressure container allows gas pressure to be applied directly onto the bag, pressurizing the liquid within the bag and forcing it into the patient.

U.S. Pat. No. 3, issued October 20, 1964, entitled "Apparatus for directing and injecting 100 liters of liquid from a flexible liquid container" by Mr. Bea et al.
．． No. 153.414 discloses an injection device in which an inflatable bladder surrounds an injection bag. The bag can be inflated by manually operated expanded compressed pulp, which applies pressure to the intravenous bag and forces fluid into the patient.

Bierman, U.S. Pat.
l! It reveals a collapsible bag housed in a pressurized bag with 11 ounces. The pressure regulator is equipped with a pressure regulator to maintain a constant pressure and control the delivery rate of intravenous fluid.

U.S. Pat. The invention discloses an injection device adapted to pressurize a sealed container contained within the container with compressed gas from an external source of compressed gas.

1974 entitled "Packages for the Storage and Delivery of Liquids" by Mr. Cogley et al.
U.S. Patent No. 5.838.794, issued on October 1,
It discloses housing a collapsible intravenous bag within a pressurized bag that is connected to a controlled source of compressed air.

The content of the prior art as specifically shown in the above-mentioned cited examples is still not fully satisfactory in the field of public medical technology. As previously mentioned, the use of gas FAM devices increases the cost and complexity of this type of injection system. Use of this type of device requires the presence of medical personnel and care must be taken to use technical ingenuity to control the pressure applied to the intravenous solution.

However, in addition to these inconvenient drawbacks, there are still some inherent problems with this device. This drawback is the incidental risk to the patient's body during practical use. In the case of W-pressure intravenous injection bags, the prior art teaches that one-pressure gas is applied directly to the intravenous injection bag. However, if the IV bag ruptures, pressurized gas may enter the IV fluid bag and ultimately be administered to the patient. This risk of air embolism is acknowledged to be a major reason why injectable fluid injection devices have not been commonly used to date. Furthermore, even a single pressure gas with favorable physical properties may be physiologically toxic if it is administered to a patient due to mechanical malfunction.

Accordingly, there is a need in the medical field for an automatic injection fluid injection device that is safe and does not suffer from the drawbacks previously experienced with similar equipment in this technology. A primary objective of the present invention is to meet this need.

Means for Solving the Problems In particular, it is an object of the invention to provide a pressurized automatic injection device. This device delivers intravenous solution at a predetermined, nearly constant flow rate and has features that pose no risk of toxicity to the patient and do not cause air embolism.

It is another object of the present invention to provide an automatic injection device for administering fluids that does not require the device to be raised to a position below the level of the user. Therefore,
This device is particularly useful in the emergency medical field.

Another object of the present invention is to provide an automatic injection solution injector with the aforementioned features capable of dispensing injection solution with a substantially constant controlled current flow, independent of the volume of injection solution remaining in the source. There is a particular thing. Therefore, there is no need for continuous adjustment and monitoring of the device by medical personnel. The resulting advantages include that the device is easy to use by medical personnel accustomed to administering injectable solutions using conventional machines, and such medical personnel do not require special training.

Another object of the present invention is to provide an automatic injection fluid injection device that is fully automated and has the features of being portable for easy storage and handling. The device is both disposable and reusable, so it can be used in a variety of situations.

Another object of the present invention is to provide a portable We and a safe and convenient injection device with features particularly suitable for patients who are walking around. Therefore, the user can actually attach the device according to the present invention to the body and continue to deliver injections for a long period of time. Other objects of the invention, and their attendant novel features, will become apparent from the brief description of the drawings.

In the accompanying drawings, which form a part of this specification and are read with reference to the specification, identical parts in each drawing are designated by the same reference numerals. (Example) Further details Please refer to the drawing. First, FIG. 1 will be explained. The automatic injection liquid injector includes a cylindrical container shell 10. The container shell 10 is made of a rigid, preferably translucent material. The container shell 10 is narrowed at the lower end 10a and covered with a tube connector cap 11. Injection solution feed tube 12
enters the connector cap 11 in a sealed state and is connected to the inside of the container shell 10. The feed tube 12 can have an appropriate length as shown by the broken line in FIG.
It is equipped with A hollow nitrogen nozzle 14 with a tipper is attached to the terminal end of the feed tube 12.

As shown in detail in FIG. 4, the nozzle 14 is fitted into the socket of the flow regulating member 15.
5 is provided with an orifice 15a of a predetermined size that passes through the member. A hypodermic injection needle 16 is removably attached to the tip of the flow rate adjustment member 15, and is inserted into the patient's body to deliver the injection solution. Inside the container shell 10 is designed a chamber 10b, designated by the letter F, for accommodating an injection solution. The container 10b containing the injection solution F is shaped by the inner wall surface of the container shell 10 and widens to a narrowed lower part 10a sealed with a cap 11 to a grab 17 which can be used to hold the container. The plug 17 is in sealing engagement with the cylindrical inner wall of the shell 10, so that when the device is rotated as shown in FIG. 1, the plug 17 presses against the upper side of the injection gF. Above the plug 17 is an inflatable gas bag 1
8 is listed. The gas bag 18 is provided with an accordion-shaped extension 18a forming a cylindrical side surface of the gas bag. This fold 18a allows the gas bag 18 to be stretched over the length of the container shell 10. Inside the upper end of the container shell 10 is also a removable pressure source transparent body 1.
9 is included. The transparent body has a cylindrical side wall having an outer diameter slightly smaller than the inner diameter of the container shell 100,
An annular portion 10f is formed between these. A hollow needle member 19a is attached to the lower end wall of the transparent body 19.
This needle member 19a is adapted to enter the gas bag 18 in a sealed state. The upper end of the transparent body 19 has a diameter that is approximately the same as the outer diameter of the container shell 10 and covers the upper edge of the container shell 10.
A transparent body 19 is appropriately placed at the end of the holder. The transparent body 19 is held in place by a removable cap 10c, this can 710c
The container shell 10 can be removably secured in place on the container shell 100 by screws, compression gaskets, or similar contact traps.

The cap 10c may also include a hook 10d for hanging the device as shown in FIG.

However, it should be understood that the device need not be able to rotate vertically as shown in FIG. , between the upper end of the container shell 10 and the movable plug 17, which allows the device to be rotated in any position since, in actual use, the injection solution is not supplied to the person by a flow of electricity. There are a plurality of openings 10e. The openings 10e allow the interior of the container shell 10 to communicate with the atmosphere four times. The uppermost one of these openings 10e is located close to the annular portion 10f. The purpose of providing such openings will become clear from the description below.

A pressurized fluid P is filled within the pressure source integral 19. Preferably, the pressurized fluid P is at atmospheric pressure and at room temperature (e.g. 70°C
below (21,1 °C)], preferably considerably lower than normal atmospheric temperature. For example, ethyl chloride with a boiling point of below 54 °C (12,2 °C) at atmospheric pressure. can also be selected as the pressurized fluid P. Of course,
Those skilled in the art will readily envision that other fluids can also be used as pressurized fluid P, such as fluorocarbon refrigerants.

By IIE and assembling in this manner, the pressurized fluid P in the holder 19 enters the inflatable gas bag 18 via the needle member 19a, applies pressure to the gas bag, and under atmospheric pressure conditions. The pressure inside the gas bag is made almost equal to the evaporation pressure of the submersion fluid P. The gas bag 18 expands and closes the lower surface of the transparent body 19, the upper surface of the movable plug 17, and the 9th area of the opening. Further, the expanded gas bag 18 applies force to the plug 17 and pressurizes the injection solution F. This injection solution F is sent into the patient's body from the hypodermic needle 16 through the tube 12 and the flow rate adjustment member 15. According to the known principle of the fluidic device, an inflatable gas bag 18 of a nearly constant pressure source and a flow control II! JS material 1
The flow rate is adjusted by the size of the orifice 15a.

Even if the transparent body 19 or the gas bag 18 ruptures or leaks, the pressure fluid P can be safely discharged to the atmosphere through the opening 10e.

See Figure 2. This figure shows a modification of the invention. The injection solution container is in the form of a rigid cylindrical shell 20. The shell 20 has a neck 20a with a fluid passage leading into the interior of the container. The upper end of the shell 20 is sealed with an end plate 20b. Inside the container is fi20c for injection UF.
There is. This chamber is filled with pressure fluid P by the spool member 21.
It is separated from the chamber 20d. The spool member 21 is
# From the movable upper plug 21a and lower plug 21b w
lriX has been done. These plugs are in sealing engagement with the inner circle 1wI wall of shell 20 and are centrally connected by @11121c. Fluid chamber 20c and pressure source chamber 20
d, the shell 20 is provided with a plurality of openings 20e communicating with the atmosphere.

In operation, a constant pressure applied by the pressure fluid P is transmitted to the fluid F via the spool member 21. This fluid F is pumped through a tube (not shown) of the type described above until it is completely exhausted. The state in which the fluid F is completely exhausted is illustrated by the dotted line diagram of the spool member 21 in FIG.

In the event of damage or pressure leakage around the upper sealing plug 21a, the pressure fluid P will flow through the opening 2 in the shell wall.
0e to the atmosphere without causing embolism or injecting toxic substances into the patient.

Please refer to FIG. This figure shows another modification of the third embodiment of the invention. The container is made of a rigid cylindrical shell 30. This shell 3
0 has t30a passing through the central opening. A collapsible bag 61 filled with injection solution F is provided inside the chamber. An inflatable bladder 62 rests on the bag 61. The bag 32 includes accordion-like pleats forming the cylindrical side walls of the bag, allowing the bag 32 to be inflated. The circular upper end wall 32a of the bag 32 is secured to the inner wall of the shell. For example, between the upper end wall 32a of the bag and the upper end wall 30b of the shell 50, a pressure source 30c loaded with a pressurizing body P is formed. Upper end f of shell 50
A pressure distribution member 63 is housed inside 50b. This pressure distributing member 33 has a sharp point that enters into the upper end wall 32a of the bag 62 under the sealed state. 33a, the pressure distributing member 63 has an inner bore 33b and a spaced radial opening 33c extending from the bore. When the pressure distributing member 33 is completely pushed down, the upper opening 33c is located within the pressure chamber BQc, and the lower opening 33c enters the inside of the bag 32. As a result, the inside of the pressure chamber 30c and the gas bag 32 are communicated through the hole 33b. During operation, the pressure distribution plunger 55 is completely pushed down to pressurize the bag 32 at a substantially constant pressure. Insert the attachment into section 34. This installation part 34 is
It is provided with a hollow needle 34a extending through the shell neck 30a and sealingly inserted into the bag 51. Therefore,
When the gas bag 32 is inflated, the injection solution F is delivered to the patient at a constant speed through the above-described feeding device. Between the upper end wall, the shell 30 is provided with a plurality of openings 30d leading to the atmosphere. Pressure leaks from the gas bag 32.

Or even if this gas bag ruptures, the pressurized fluid is vented to the atmosphere through the opening 30d in the shell wall, ensuring patient safety.

The embodiments of the invention described with reference to the embodiments of FIGS. 1-3 may be utilized in disposable and portable injection devices. of course,.

Depending on the amount of injection to be delivered to the patient, the device can be sized so that it can be easily secured to the body of an ambulatory patient.

Next, a fourth embodiment of the present invention will be described. This example is for a large refillable device that is portable but not capacitively designed to be fixed to the patient's body. Please refer to FIGS. 5 to 9.

The flexible bag 40 contains a volume of injection fiF to be injected into the patient's body. The bag 40 includes an outlet 40a and a length of tube 42 connected to the outlet.
It is equipped with A hypodermic needle, shown generally at 45, is connected to the free end of the tube so that it can be inserted into the patient's body and cause the injection solution F to flow from the bag 40 to the patient. An adjustable valve or flow regulator 44 is provided in the tube 42 to regulate the flow rate of the injection fluid F through the tube to the patient. Apart from this, the flow rate adjusting member 15 shown in FIG.
You can also use a fixed adjustment device.

A pressurable annular bag 45 surrounds the bag 40. Further, at least one end of the hang bag 45 is open so that the bag 40 can be received therein.

Means capable of selectively distributing pressure is provided as shown at 46,
The bag is pressurized, and as a result, the injection solution F in the bag is pressurized. In FIGS. 7 to 9, this pressurizing means is shown as a closed tank or container 47 containing a quantity of pressurized fluid P therein.

The pressure distribution means 46 further includes selectively actuatable means, generally indicated at 48. This selectively actuatable means communicates between the container 47 and the tank 45 to allow pressurized fluid P to flow from the container to the bag, pressurizing the bag and causing the bag 45 to flow.
The injection solution F in the bag can be pressurized and the injection solution in the bag can be maintained at a substantially constant pressure while the injection solution leaves the bag.

More specifically, the device 39 includes a non-inflatable housing 49. The housing 49 is preferably made from a rigid, transparent material. The housing 49 is generally rectangular in cross-section and has a removable end cap 50 at one end forming the forward end of the housing and a cap 51 secured to the opposite end of the housing. (See Figure 7).If you remove the removable lid 50, you can open the bag 45 holding the bag 40.
-Can be inserted into Ujifugu 49. Lid 50 and 5
1 is an opening 52 that connects the inside of the housing 49 to the atmosphere.
It is equipped with It is worth noting that with the lid 50 fitted in place on the housing 49, the inside of the housing is under atmospheric pressure.

Bag 40 is a flexible bag with walls 40b and 40c (see FIG. 7). These walls are welded together by heat sealing or the like around the approximate periphery of the bag. The end is provided with a bag outlet 40a, which is shown as comprising a stopper 53 sealingly secured to the end of the bag and projecting outwardly from this end. The receiver has openings 53a and 53b.This receiver can be used to insert a hollow acceptance member (as explained below) into the opening to connect the tube 42 to the bag, or to insert a hypodermic needle or the like into the bag. Various drugs can also be injected into the receptacles.Each receptacle has an inlet 53a and 53b with a seal 55cw that can be pierced.

Bag 45 is made from a flexible material such as a suitable plastic film. The illustrated bag 45 also has an outer wall 45a and an inner wall 45b joined by a seal 45c.
(See Figure 7). For example, an annular bag may be formed with at least one open end. This open end is sufficiently large to allow the bag 40 filled with the injection solution F to be inserted into the bag. When the bag 45 is pressurized, the outer wall 45a of the bag expands and presses against the inner surface of the housing 49. As mentioned above, the housing 4
Since 9 is made of a rigid structure, it serves to restrain the outward expansion of the bag 45.

Therefore, a force is applied to the bag 45, compressing the bag 40 while pressurizing the bag.

As shown in FIG. 7, the bag 40 filled with the injection solution is covered inside the bag 45, the bag 45 and the bag 40 are attached to the housing 49, and the lid 50 is fitted into the housing at a predetermined position. , the stopper 56 protrudes from the bag 40 and passes through the opening 5°ag of the lid 5o.

The drip chamber is equipped with a lid 50, as generally indicated by 55 in FIG. The drip chamber includes a transparent cylinder 55a that is substantially larger in diameter than the tube 42. The drip chamber 55 also has an inlet nipple 55b at one end.
'Y-shaped, and has an outlet nipple 55c at the opposite end. Since the inlet nipple 55b is inserted into the cylinder 55a, under the normal operating position of the drip chamber 55, the drip chamber 55 is vertically tilted so that the inlet nipple 55b is above the outlet nipple 55c.

Further, since the injection solution F enters the drip chamber through the inlet nipple, a droplet of a substantially constant size is formed at the lower end of the inlet nipple within the cylinder 55a. The rate at which this droplet is formed is commensurate with the flow rate of the injection solution from the bag 40, and the rate of flow of the injection solution is determined by adjusting the valve 44 or by measuring the number of drops within a predetermined period of time. The rate of this flow can be adjusted within a certain range i11
′! It is also possible to do I6. As shown in detail in FIGS. 5 and 6, the drip chamber 5 is held by a bracket 56. This bracket 56 is connected to the lid 50 by a hinge 57. The bracket 56 oscillates between a first position generally parallel to the lid 50 (as shown in FIG. 5) and a second position generally perpendicular to the lid 50 (as shown in FIG. 6). can move.

As explained below, the device 69 can be used either lying in a horizontal position or in a vertical position with the device 69 facing upwards. When the bracket 56 is laid horizontally in the first position. The inlet nipple 55b of the drip chamber is located at the top of the drip chamber, and the table 58 (FIG. 6) is attached to the bracket 5.
6, the inlet nipple is placed in the upper position of the drip chamber. It is necessary to pay attention to this point. Tube 42 includes a first length attached to inlet nipple 55b and a second length attached to outlet nipple 55c. The free end of the first length of tube 42 carries a hollow acceptance member 59 . This acceptance inspection member 59 receives the stopper 53 with a seal 5 inside the entrance 53a or 5bK.
A hole is made in 3c so that the injection solution F can be taken out. The tube 42 has a valve means 44 disposed midway through the tube and a needle 43 at its free end.
It is equipped with The tube 42 can also be provided with a receptacle 60 that can be pierced. This installation involves injecting the drug into the section 60 through the hypodermic needle,
It can also be injected together with injection solution F into the patient.

In addition to being able to be used in the lying and upright positions described above, the device 39 is designed to allow the housing to be suspended and mounted on the end wall 5.
1 can also be used facing downward. This allows the device to be used even in the event of a failure of the X-pressure system 46.The hook 61 (see FIG. 7) can be moved from the IV post to the housing in the same manner as a conventional IV bag. 49 is provided on the end wall 51 for hanging.

The hook 61 is preferably hinged to the end wall 51 so that it can also be flattened by rotation. By suspending the housing with the 7-knot 61, the opening 40a of the bag is located at the bottom of the bag. IV drip monitor 5
5 from the clip on bracket 56, the monitor can be lowered vertically.

The pressure means 46 includes a length of tube 62 sealingly attached to and connecting the bag 45, and the pressure means 46 includes a hollow acceptance member 66 at the opposite end.
The acceptance inspection member 65 is fixedly held on the housing 49 at one end of the tubular guide 64.

The guide 64 is fixed inside the lid 50 and extends over one corner of the housing 49.

It can be seen that the bag 45 pushes against the outside of the guide 64 when pressurized. The container 47 is equipped with a seal 47a that can be punched on the side of the acceptance inspection member 63.
7a is spaced apart from the tip of the acceptance inspection member 66 8
g1 position (FIG. 8) and the second or operating position (FIG. 8) in which the acceptance member punches a hole in the seal, takes out the fluid PY from the container 47, pressurizes the bag 45, and compresses the injection solution in the bag 40. (FIG. 9), it can be moved in the axial direction within the guide 64.

Container 47 is equipped with a handling handle 47b.

The handling handle 47b projects out of the lid 50 through an opening 50b in the lid 50 and allows the container 47 to be manually moved relative to the acceptance member 63 between the first and second positions. As shown in detail in Figures 8 and 9,
The container 47 is an elongated cylinder, and the container 4
The guide 64 is provided with a projection 47cY extending axially on the outer surface of the guide 64.

When the container is rotated between an insertion position where the protrusion 47c and the axial rotation slot h64a are not aligned to an operating position where the protrusion 47c and the axial slot 64a are aligned with each other, the axial slot 64a is aligned with the container 47. Protrusion 47c? Uke is now allowed to enter. If the handling handle 47b is placed in a safe position (FIG. 8), the seal 47a of the container 47 may be inadvertently punctured and the bag 45
There will be no sudden pressure.

As shown in detail in FIG. 5, the housing 49 is provided with a viewing window 49a on one side, and a capacity display scale 49b is attached at a position adjacent to the viewing window of the housing. Preferably, bags 45 and 40 are made of transparent plastic film or the like. Therefore, the bag can be observed through the viewing window 49 to determine the amount remaining in the bag. When compared with the scale 49b, the amount of injection solution F remaining in the bag 40 can be easily determined.

Attached to the bottom of the housing 49 is a strip of pressure sensitive tape or the like with a removable outer cover or backing 65a, indicated at 65. When using the device of the present invention, the cover 65a'? : Once stripped, the housing can be glued to a supporting surface such as the floor of the ambulance or a bedside table to prevent movement of the device relative to the patient. Also, attach the label 66 (see Figure 5) to the lid 5.
0 to display the patient's status regarding injection gF or to record the injection solution administered to the patient.

As described above, the bag 45 and the bag 40 are open to the atmosphere even if they are stored in a predetermined position in the housing 49 with the lid 50. Therefore, even if the pressure container 47 is ruptured or leaks from the container before use, the pressure fluid P will be immediately discharged to the atmosphere and will not pressurize the bag. Even if there is a leak in bag 40, will it be an injection? The iF can be expelled from the bag through the enclosure. The lateral pressure fluid is blocked from the bag 40 by the inner wall 45b of the bag 45 and does not act directly on the bag 40.
No pressurized fluid will enter this bag 40 even if a leak occurs. On the other hand, even if the bag 45 is torn during use,
The jaw pressure fluid P should be discharged to the atmosphere through the discharge 052 so as not to cause any harm. Such a configuration eliminates the risk of gas embolism or chemical toxicity to the patient.

By using a fluid P such as ethyl chloride having a boiling point below room temperature, the bag 45 is quickly pressurized to a predetermined working pressure. Then, the injection solution F is pushed out of the bag 40 at a predetermined pressure (that is, the evaporation pressure of the pressurized fluid P). valve 44
By setting Yv4, the flow rate of the injection solution sent to the patient can be easily controlled. While the injection solution F is flowing out of the bag, the m-pressure fluid P automatically fills the bag 45, which expands in volume.

Bag 40 is maintained at approximately constant pressure. Therefore, injection solution F
The pressure to push out the device is not related to lifting the device above the patient. Therefore, the inventive injection device can be easily used and equipped on the battlefield, in helicopters, and in hospitals.
It turns out that there is no need to lift jIL.

Next, FIG. 10, which illustrates the final embodiment of the present invention, will be described. The embodiment of FIG. 1o differs from the embodiment of FIGS. 1-3 in that it includes a disposable infusion unit with a reusable pressure knit. Both of these units can be attached to the emergency patient's body by conventional means.The fecal injection syringe is constructed of a rigid cylindrical shelf. This shelf o has a neck 70a with a central opening at one end.

As can be seen from the previous embodiments, suitable attachments can connect the tool and feed tube (not shown) to the neck 70a. The injection solution contained in the injection chamber 70b of the shelf 0 is pressed by the spool metering plunger 71. This spool metering plunger 71 is composed of a central rod 71a having movable plugs 71b and 71cY at both ends. These movable plugs sealingly engage the inner cylindrical wall of shelf 0. A discharge opening is provided in the shell such that whatever position the spool part 71 is in the shelf 0, it will be located between the movable plugs 71b and 71c.

Similar to the neck section 70a to which the injectable fluid delivery tube is connected, the end of the shelf 0 opposite the neck section 70a is provided with a central opening through-through neck section 70c. This neck portion 70c has a tube 73 of a certain length.
A feeding &-f section 72 with Y is connected. The opposite end of the tube 730 is provided with a flow regulating device 74"k through the orifice 74a. This flow nodal device 74 is removably connected to a mechanical pressure source unit, the pressure source being A neck 75a' through which a central opening passes through the end of the
It is provided with two cylindrical housings 75Y. The neck 7
A TX* adjustment device 74 is fitted to 5a. Housing 7
5 includes a movable granger 76Y having a plug member 76a. The plug member 76a includes a handle member 76b that sealingly and movably engages the inner surface of the housing 75 and projects outwardly from the closed end 75b of the housing 75. A compression spring 77 is housed within the housing 75 and surrounds the plunger 76. The compression spring 77 pushes against the rear of the plunger plug 76a, pushing the one-lunger lug 76a toward the necked end 75a of the housing L5.

In this manner, the fluid passageway is connected to one langeer plug 76a.
and the rear plug 71c of the spool member 71 in the shelf 0. The shelf 0 is the injection fi
It houses F. This fluid passage is filled with an incompressible fluid P. Additionally, the inner diameter of the pressure housing 750 is larger than the inner diameter of the injection liquid shelf 0.

Therefore, the pressure to press and suspend the injection solution F to the patient during operation is leaked by the splash 77. This spring 77 presses against the incompressible fluid P, which transmits this force to the spool member 71 of the syringe. Since the diameter of the pressure plunger 76a is larger than the diameter of the spool member 71 that pushes the injection solution F, the plunger 76 due to the influence of the compression spring 77
A slight linear movement of the spool member 71 causes a large linear movement of the spool member 71, and the injection liquid F is sent out from the syringe. The amount of injection solution is determined by squeezing orifice 7 of appropriate size.
4a is controlled by a flow iFA node device 74. The flow rate regulator 74 may be installed at one end of the hose connecting the pressure source and the syringe, or in the middle of the hose, or at one end of the hose used to deliver the injection QY to the patient. It should be noted with reference to this last embodiment of the invention that the pressure transmitting fluid P, which is an incompressible fluid, can also be provided in the middle of the hose.
Avoid direct contact with. Therefore, as a safety structure, even if the incompressible pressurized fluid P leaks from around the rear plug 71c of the spool member 71, the leaked pressurized fluid is discharged from the syringe 70 without causing any harm. This eliminates the risk of toxic substances entering the patient's body.

From the foregoing, it will be appreciated that the present invention achieves all of the foregoing objects as well as other advantages afforded by its unique structure.
! It can be seen that the features of the joints as well as the features attached to these have a unity and can be used separately from other features and the features attached to these other percentage marks. need to understand. Such matters are contemplated by and within the scope of the following claims.

Because the invention may be practiced in many embodiments without departing from the scope of the invention, all matter set forth herein or shown in the accompanying drawings is incorporated by way of illustration. This is not intended to limit non-invention.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view of an autoinjector illustrating a first embodiment of the present invention, with a portion of the delivery tube being shown in its entirety. FIG. 2 is a cross-sectional side view of an injection device illustrating a second embodiment of the present invention. FIG. 3 is a cross-sectional side view of an autoinjector illustrating a third embodiment of the present invention. FIG. 4 is an enlarged partial cross-sectional view illustrating a flow regulating fluid delivery structure. , FIG. 5 is a diagram illustrating a fourth embodiment of the present invention.
FIG. 1 is a perspective view of an active injection drug injection device. FIG. 6 is a top view of an automatic injection system injector in a typical operating position. FIG. 7 is a longitudinal cross-sectional side view of the injection device shown in FIG. FIG. 8 is an enlarged view of a part of the apparatus shown in FIG. 7, illustrating means by which the liquid in the injection bag can be laterally pressurized by means of pressurizing means. The depression means is shown ready for use. FIG. 9 is a view similar to FIG. 8 and shows the pressurizing means in the operating position. FIG. 10 is a cross-sectional side view of an automatic injection device illustrating a fifth embodiment of the invention. 10...Container shell 11...
Connector cap 12...Tube 13...
...Flow rate control valve 14... Tuzzle 1
5...Flow rate adjustment member 16...Hypodermic injection needle 17...Possible plug 18...Ga
Bag 19... Container 20.
...Cylindrical shell 21 ... Suguru member 30 ... Cylindrical shell 31 ...
... Folding bag 52 ... Inflatable bag 33 ... Pressure distribution member 54 ... Attachment part 40 ... Flexible bag 42...
... Tube 46 ... Hypodermic needle 44 ...
... Flow rate control device 45 ... Annular bag 46
...Means that can distribute pressure 47...
48...Selectively operable means 4
9...Housing 50.51...Lid 52...Opening 53...
...Stopper 55...Drip
Presentation 56...Bracket 57...H
58... Table 61.
...Futsu 62...Chu-pro 3...Hollow acceptance inspection member 64...
・・・Annular guide 65 ・・・Pressure sensitive tube
66... Label Lure 0... Cylindrical shell 71... Plunger 72...
...Feeding attachment is part 73...Chu -
Bu 74... Flow rate adjustment device 75...
・Cylindrical housing 76...Plunger 7
7...Compression spring (name to remove)

Claims (21)

[Claims] (1) An automatic injection device for administering an injection solution to a patient at a substantially constant rate and pressure, the device comprising: a rigid shell having a hollow interior; and a variable volume inside the shell; and means defining an injection fluid chamber adapted to receive an injection fluid; providing a substantially constant pressure within a volume spaced from said injection fluid chamber and expandable for receiving pressurized fluid; means having a pressure source configured as such; pressure transmission interposed between the injection liquid chamber means and the pressure source chamber means within the shell to transmit a substantially constant pressure from the pressure source chamber to the injection liquid chamber; means; a feeding means connected to the injection solution chamber means for delivering the injection solution at a controlled constant flow rate; provided in the shell between the injection solution chamber means and the pressure source chamber means; 1. An automatic injection fluid injection device, the interior of which is connected to the atmosphere, and relief means for safely venting any pressure leakage from the pressure source chamber means to the atmosphere. (2) In the automatic injection liquid press-in device according to claim 1, the injection liquid chamber means is housed inside the shell so as to be in sealing engagement with the shell, An injection solution is contained in one end of the shell, and when the injection solution is discharged from the injection solution chamber means, as the amount of the injection solution decreases, the inner wall of the shell is moved while maintaining a sealed state. An automatic injection device having a movable plug member capable of being moved. (3) In the automatic injection liquid injection device according to claim 1, the injection liquid chamber means includes a collapsible bag that is housed inside the shell and can contain an injection liquid. , the bag being fluidly connected to the delivery means. (4) In the automatic injection liquid injection device according to claim 1, the pressure transmitting means comprises an inflatable bag, and the inflatable bag is connected to the pressure source chamber means and the injection liquid. an automatic injection fluid injector disposed within said shell between said fluid chamber means and operative to expand within said shell under the influence of pressure to apply a substantially constant pressure to said fluid chamber means; (5) In the automatic injection liquid press-in device according to claim 4, the device is further inserted into the inflatable bag to establish a fluid connection between the bag and the pressure source chamber means. , an automatic injection fluid injector having selectively actuated needle means. (6) In the automatic injection liquid press-in device according to claim 1, the pressure transmitting means includes first and second pressure transmitting means disposed within the shell and connected to each other by a rigid support member.
a spool member having a plug member, the first plug member being within a shell and movable in contact with the pressure source chamber means while remaining engaged with the shell, and the second plug member being movable in contact with the pressure source chamber means; The plug member is within a shell and is movable against the injection chamber means while remaining in engagement with the shell. (7) In the automatic injection liquid injector according to claim 1, the feeding means includes a flow rate control valve that variably supplies injection liquid at a constant flow rate and at a substantially constant pressure. Automatic injection liquid injection device. (8) In the automatic injection device according to claim 1, the feeding means includes a flow rate regulating member, the flow rate regulating member has an orifice of a predetermined size, and the flow rate regulating member has an orifice of a predetermined size, and a constant flow rate is maintained through the orifice. An automatic injection liquid injection device that supplies injection liquid at a flow rate at a nearly constant pressure. (9) In the automatic injection liquid press-in device according to claim 1, there is provided a fluid passageway having a constant volume filled with an incompressible fluid that acts on the pressure transmission means, and a fluid passageway that acts on the fluid passageway. an automatic injection fluid injector comprising mechanical power means. (10) In the automatic injection liquid injection device according to claim 1, the pressure fluid is composed of a liquid waiting for a normal boiling point below atmospheric temperature, and therefore a substantially constant pressure is maintained under atmospheric conditions. an automatic injection fluid injector that approximately equals the vapor pressure of said liquid in the fluid. (11) An automatic injection fluid injection device for administering fluid to a patient at a substantially constant rate and pressure, the device comprising: a flexible bag containing a volume of fluid to be injected and having an outlet; a flexible tube means for flowing the injectable solution from the bag to the patient; a means for controlling the flow rate of the injectable solution to the patient; an annular pouch surrounding the bag; selectively actuatable pressurizing means capable of pressurizing the injection solution in the bag by compressing the injection solution and maintaining the injection solution in the bag at a substantially constant pressure as the injection solution exits the bag; The pressurizing means has:
a closed container, a volume of pressurized fluid contained within the container, and selectively functioning to provide communication between the container and the bag, allowing the pressure fluid to flow from the container to the bag; the device further comprises a non-inflatable housing in communication with the atmosphere surrounding the bag with the bag placed therein, the housing being in communication with the atmosphere surrounding the bag; An automatic injection device that holds this bag in place. (12) The automatic injection liquid injection device according to claim 11, wherein the container is held by the housing. (13) In the automatic injection liquid feeder according to claim 12, the communication means includes a manual operation means outside the housing, and selectively operates to transfer the pressure fluid from the container. An automatic injection liquid injector capable of opening the bag and pressurizing the injection liquid in the bag. (14) In the automatic injection device according to claim 13, the communication means comprises a conduit means for communicating between the container and the bag, and the container is perforated. a seal, the conduit comprising a hollow lance, the container and the lance being movable relative to each other to pierce the seal; , an automatic injection fluid injection device capable of flowing said pressurized fluid from a container to a bag. (15) The automatic injection device according to claim 14, wherein the container has a handle projecting outwardly from the housing, the container is held within the housing, and the seal is a lance. a first location remote from the lance and a second location where the lance pierces the seal;
and guide means for guiding movement of said container between positions. (16) In the automatic injection liquid injector according to claim 15, the lance-like member is fixed to the guide means, and the container is connected to the first and second portions of the container.
An automatic injection fluid injector that is axially movable between positions. (17) In the automatic injection liquid injection device according to claim 16, the container is provided with an axial protrusion,
The guide means also includes an axial slot, the slot being capable of accommodating the projection when the container is rotated relative to the guide means to align the projection with the slot. . (18) In the automatic injection liquid feeder according to claim 11, the enclosure is rigid and further includes a lid at at least one end of the enclosure, and the flow rate control means is , an automatic injection fluid injector having a drip indicator attached to said tube means and valve means for said tube means, said drip indicator being retained by said lid. (19) The automatic injection device according to claim 18, wherein the housing includes means at an opposite end for suspending the enclosure so that the outlet of the bag faces downward. Automatic injection liquid press-in device. (20) In the automatic injection device according to claim 11, the enclosure is rigid and has a substantially rectangular cross section, and the enclosure is adapted to rest on one side. Automatic injection liquid injection device. (21) In the automatic injection liquid injection device according to claim 11, the pressure fluid is composed of a liquid having a normal boiling point below atmospheric temperature, so that a substantially constant pressure is maintained under atmospheric conditions. an automatic injection fluid injector that approximately equals the vapor pressure of said liquid in the fluid.