CA2080370C - Disposable infusion apparatus with peristaltic pump - Google Patents
Disposable infusion apparatus with peristaltic pumpInfo
- Publication number
- CA2080370C CA2080370C CA 2080370 CA2080370A CA2080370C CA 2080370 C CA2080370 C CA 2080370C CA 2080370 CA2080370 CA 2080370 CA 2080370 A CA2080370 A CA 2080370A CA 2080370 C CA2080370 C CA 2080370C
- Authority
- CA
- Canada
- Prior art keywords
- tubing
- segment
- fingers
- infusion apparatus
- intermediate segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14228—Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/082—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/28—Clamping means for squeezing flexible tubes, e.g. roller clamps
- A61M39/281—Automatic tube cut-off devices, e.g. squeezing tube on detection of air
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Reciprocating Pumps (AREA)
Abstract
A disposable infusion apparatus (10) includes proximal, distal and intermediate segments of IV tubing (14) connected via couplings (20, 26). The intermediate segment (34) has a length sufficient for operative engagement with a pumping member (32) of a peristaltic pump throughout a pumping stroke thereof. The intermediate segment (34) further has a maximum Durometer of seventy-five on the Shore A scale. The pumping member (32) includes a plurality of fingers (32a) mounted in side-by-side substantially parallel relationship for individual reciprocation. Motor driven cams (36) individually reciprocate respective ones of the fingers in a predetermined timed sequence so that when the linearly disposed intermediate segment (34) is squeezed by the fingers (32a), intravenous fluid in the tubing will be pumped therethrough. The disposable apparatus (10) further includes a door (40) connected to opposite ends of the intermediate segment (34) and which is releasably loadable in a case (12) to place the intermediate segment into operative engagement with the pumping member.
Description
Disposable Infusion Apparatus With Peristaltic Pump Technical Field The present invention relates to medical devices, and more particularly, to an improved disposable infusion apparatus and peristaltic pump for delivering intravenous drugs at a controlled rate to a patient.
Backqround Art It is often necessary to intravenously supply patients with pharmaceutically active liquids over a long period of time at a controlled rate. It is desirable that this be accomplished while the patient is in an ambulatory state.
The prior art includes devices that employ a bag filled with fluid medication that feeds by gravity through IV tubing having drip or other controllers. It is difficult for a patient to be ambulatory with a gravity fed infusion device and flow control is very limited.
Another prior art infusion apparatus comprises an elastic bladder forming a liquid container mounted in an elongated cylindrical housing, a flow control valve, and tubing for supply of the liquid to the patient. The elastic walls of the bladder expand along the walls of the cylindrical housing when filled with the liquid, and provide the pressure for B
W O 91/16933 PC~r/US91/02930 expelling the liquid. The bladder is typically filled by hand with a syringe which often requires an inordinate amount of force. Another drawback is that the bladder is forced to expand into an unnatural 5 elongated configuration along the housing walls as it is filled. As a result of this unnatural configuration, the pressure of the bladder varies widely with the volume of liquid therein. Therefore, in most cases this type of elastic infusion apparatus 10 does not have a reasonablv stable pressure and flow rate over the infusion period.
Most of such devices either have a flow rate that decreases with pressure, which decreases with volume, or one that remains roughly constant until the end 15 where it surges. Attempts have been made to control pressure and flow rates bv means of complicated and expensive flow control valves and devices. Other approaches have utilized exotic and expensive elastic materials in an effort to control the pressures and 20 flow rates.
Another type of infusion apparatus emplovs a peristaltic or other positive displacement pump which is electrically driven. Programmable infusion pumps have been provided having the capability for precise 25 tailoring of the fluid delivery rate parameters in four different modes, namely, continuous, intermittent, PCA (patient controlled analgesic) and TPN (total parenteral nutrition). Originally such programmable infusion pumps were large and not well 30 suited for ambulatory patients. They used complex and expensive replacement pump cartridges to maintain sterilitv. More recently, small proqrammable infusion pumps have been available with disposable plastic cartridges that engaae a peristaltic pump. However b ; ~
.. . .
:. ~
20~0370 such cartridges have been bulky and expensive and have required excessive drive power in the pumps, leading to rapid battery drain.
Accordingly, it would be desirable to provide an 5 improved disposable infusion apparatus and pump for delivering intravenous drugs at a controlled rate to an ambulatory patient.
Disclosure of Invention It is therefore the primary object of the present invention to provide an improved disposable infusion apparatus and pump for delivering intravenous drugs at a controlled rate to an ambulatory patient.
In accordance with our invention a disposable 15 infusion apparatus includes proximal, distal and intermediate segments of IV tubing connected via couplings. The intermediate segment has a length sufficient for operative engagement with a pumpins member of a peristaltic pump throughout a pumping 20 stroke thereof. The intermediate segment further has a maximum Durometer of seventy-five on the Shore A
scale. The pumping member includes a plurality of fingers mounted in side-by-side substantially parallel relationship for individual reciprocation. Motor 25 driven cams individually reciprocate respective ones of the fingers in a predetermined timed sequence so that when the linearly disposed intermediate segment is squeezed by the fingers, intravenous fluid in the tubing will be pumped therethrough. The disposable 30 apparatus further includes a door connected to opposite ends of the intermediate segment and which is releasably loadable in a case to place the intermediate segment into operative engagement with the pumping member.
WO9t/16933 PCT/~iS91/02930 20~037~ _4_ ~rief Description of Drawings The above and other objects and advantages of the present invention will become apparent from the following description when read in conjunction with 5 the accompanying drawings wherein:
- Fig. l illustrates a programmable infusion system in phantom lines with a preferred embodiment of our disposable apparatus loaded therein. The disposable is shown connected to conventional IV tubing segments, an lO IV bag, a spike connector and a leur fitting. The IV
tubing segments are broken at various locations to make this figure more compact.
Fiq. 2 is an enlarged fragmentary view of the programmable infusion system with the disposable l5 apparatus installed therein and showing its relationship to a preferred embodiment of our peristaltic pump.
Fig. 3 is a further enlarged view of the peristaltic pump and the door of the disposable. The 20 IV tubing segments are not shown in this figure.
Fig. 4 is an enlarged view of the three seqments of tubing that form part of the disposable.
Fig. 5 is an enlarged side elevation view of one of the fingers of the peristaltic pump showing how it 25 squeezes shut the intermediate tubing segment of the disposable.
Fig. 6 is a side elevation view of one of the cam wheels of the peristaltic pump. The motion of the cam wheel is illustrated in phantom lines.
Figs. 7-9 illustrate details of the disposable door, tube clamp and IV tubing couplings.
W O 91/16933 PC~r/~S91/02930 2~80370 - Best Mode for Carrying Out the Invention Referring to Fig. 1, a programmable infusion system 10 is illustrated which is adapted to utilize our disposable infusion apparatus and peristaltic 5 pump. It includes a compact, portable rectangular case 12. By way of example, the case may be made of iniection molded plastic and may measure approximately seven inches in length by approximatelv three and one-half inches in width (right side in Fig. 1) by 10 approximately one inch in thickness (right side in Fig. 1).
The preferred embodiment of our disposable IV
tubing apparatus 14 (Fig. 2) may be releasably loaded or installed in a receptacle 16 (Fig. 2) in a long 15 side edge of the case 12. The proximal end disposable IV tubing apparatus 14 is connected to a conventional spike 20 (Fig. 1). The patient inserts the spike into a conventional bag 22 of intravenous fluid in which the desired medications are dissolved. The distal end 20 of the disposable IV tubing apparatus 14 is connected to a conventional male leur fitting 26 which in turn connects to a conventional IV catheter (not illustrated). A disposable IV fluid conveying means is a necessary requirement in an infusion system since 25 it ensures sterility. It also prevents residual amounts of medication from one IV drug administration from being inadvertentlY delivered when a new IV drug administration commences.
Referring to Fig. 2, the preferred embodiment of 30 our peristaltic pump 30 is mounted inside the case 12 adjacent the receptacle 16. A pumping member 32 of the pump engages a linearly disposed intermediate segment 34 of the disposable IV tubing apparatus 14.
The pumping member 32 comprises nine individual 20~0370 fingers 32a which slide back and forth toward and away from the intermediate IV tubing segment 34. The fingers 32a are moved by corresponding cam wheels 36 (Fig. 6). A flexible boot 33 (Fig. 2) surrounds the 5 fingers and forms an interface between the fingers and the intermediate segment 34 of IV tubing. The peripheral edges of this boot are sealed to internal walls of the case to protect the pump from contamination. Each cam wheel 36 (Fig. 5) has a 10 splined mounting hole 37 therethrough which is offset from the center of the wheel. Each finger 32a comprises a rectangular block having a circular hole in which a corresponding one of the cam wheels 36 rotates. The hole has a diameter slightly larger than 15 the outside diameter of the wheel so that the wheel can rotate inside the hole and thereby pull the finger back and forth. The motion of one of the cam wheels is illustrated in phantom lines in Fig. 6.
The cam wheels 36 are mounted on a splined shaft 20 38 in progressive, offset alignment for individually reciprocating respective ones of the fingers 32a in a predetermined, timed sequence. The linearly disposed segment 34 of IV tubing is progressively squeezed by the fingers 32a so that intravenous fluid in the 25 tubing is pumped therethrough.
The intermediate IV tubing segment 34 is preferably made of vinyl or silicone and has a maximum Durometer of seventv-five measured on the Shore A
scale. By using a highly pliant, non-stiff resilient 30 flexible tubing segment of this type, it is possible for the individual fingers 32a of the peristaltic pump 30 to each squeeze off and completely close the tubing segment during one cycle of its respective cam wheel.
This squeezing off is illustrated in Fig. 5. This ~.
, ,~
20~0370 ensures a true positive displacement pump in which a single rotation of the splined shaft 38 will cause a predetermined volume of fluid to be pumped through the disposable IV tubing apparatus 14. Having such a 5 non-stiff disposable IV tubing apparatus 14 also ensures that less torque is required to rotate the splined shaft 38, thereby resulting in an overall reduction in energy consumption when the peristaltic pump is electrically driven from battery power as 10 hereafter described.
The fingers 32a preferably have small teats 32b (Fig. 5) projecting from the ends thereof. These teats engage and squeeze the intermediate IV tubing segment 34. It has been determined that these teats 15 ensure that the tubing segment 34 will be completely squeezed off during each cycle of each finger. It is important to understand that the intermediate tubing segment 34 must have a minimum amount of stiffness and resilience or else it will not open and close in a 20 manner that will permit it to function as a peristaltic pump. Preferably the tubing segment 34 has a minimum Durometer of thirty-five measured on the Shore A scale.
Referring again to Fig. 2, the programmable 25 infusion system 10 includes means for releasably mounting the intermediate IV tubing segment 34 adjacent the pumping member 32. The intermediate tubing segment 34 is mounted to a door 40 having a hook-shaped member 40a (Fig. 3) at one end and a 30 compressible clasp 40b at the other end. The hook-shaped member 40a of the door may be engaged by the patient with a shoulder 16a (Fig. 2) located at one end of the receptacle 16 in the case 12. The other end of the door is then swung in and the clasp ~ i ~J,, 2~)370 -40b snaps into the other end of the receptacle 16.
The intermediate IV tubing segment 34 is squeezed between the individual fingers 32a and a compressible, resilient pad 42 (Figs. 3 and 5) supported by the 5 innerside of the door 40. This pad mav be made of polyurethane foam.
The shaft 38 (Fig. 3) which supports the cam wheels 36 is journaled at opposite ends in ball bearings 44. A gear 46 rigidly mounted on one end of 10 the shaft 38 meshes with another gear 48 (Fig. 2) rigidly mounted on another shaft 50 of a DC motor module 51 having an internal 141:1 gear reduction. In other words, one-hundred and forty-one rotations of the armature of the DC motor turns the shaft 50 one 15 revolution and thus the cam shaft 38 one revolution.
Referring to Fig. 4, the disposable IV tubing apparatus 14 has a proximal tubing segment 52 and a distal tubing segment 54 connected to opposite ends of the intermediate IV tubing segment 34 by means of 20 couplings 56 and 58. These couplings are attached to the underside of the door 40 as hereafter described in conjunction with Fig. 9.
Referring to Fig. 4, the intermediate IV tubing segment 34 preferably has an inside diameter of 25 approximately 0.125 inches. Silicone and VINYL tubing can be commercially obtained having the desired stiffness. The proximal segment 52 and the distal segment 54 are each preferably made of clear polyvinyl chloride (PVC) having an outside diameter of 30 approximately 0.140 inches and an inside diameter of approximately .088 inches. This clear PVC tubing is larger in both inside and outside diameter than the conventional PVC tubing segments 55a and 55b (Fig. 1) ~,' W O 91/16933 PCVr/~S91/02930 2o8o~7o _g_ which connect the segments 52 and 54 to the spike 20 and male lure fitting 26, respectively.
In an actual prototype of our preferred embodiment, the designed maximum delivery rate is 5 approximately three hundred milliliters per hour. The minimum desiqned delivery rate is apProximatelv 0.1 milliliters per hour. The delivery resolution is approximately 0.1 milliliters per hour for .01 through 99.9 milliliters per hour and approximately one 10 milliliter per hour for approximately one hundred to three hundred milliliters per hour. In the prototype, the desiqned maximum volume to be infused (VT~I) is one thousand milliliters and the minimum volume to be infused (VTBI) is approximately 0.1 milliliters. The 15 designed "keep vein open" (KVO) rate is approximately one milliliter per hour for one through three hundred milliliter per hour rates and approximately 0.1 through 0.99 milliliters per hour for 0.1 through 0.99 milliliter per hour rates.
Referring to Fig. 7, the door 40 hac a rectangular aperture 90 formed adjacent the hook-shaped member 40a. A resilient metal tubing squeezer 92 has an upper end 92a which is tightly received in the aperture 90 in the door 40. The 25 squeezer 92 has a pair of parallel downwardly extending arms which terminate in coiled sections 92b. Referring to Fig. 8, when the disposable is assembled, the intermediate segment 34 is squeezed shut between the coiled sections 92b. When the door 30 40 is installed into the receptacle 16 of the case 12, the hook-shaped member 40a is engaaed with the shoulder 16a (Fig. 2). The other end of the door having the clasp 40b is then swung toward the case.
As this happens, the coiled sections 92b of the tubing W O 91/16933 PC~r/US91~02930 208037 ~ -ln-squeezer 92 engage upstandinq projections 94 (Fig. 8) in the receptacle. These projections are spaced so that the coiled sections are displaced outwardly awav from the intermediate tubing segment 34 thereb~7 5 unclamping the same. This is illustrated in phantom lines in Fig. 8. The squeezér performs a very important function. Namely, if the disposable IV
tubing apparatus 14 should be inadvertently removed from the case 12 it will squeeze off the intermediate 10 tubing section 34 and prevent free flow of intravenous fluid by gravity action.
Referring to Fig. 3, the clasp 40b consists of a V-shaped element. The door 40 is preferably made of injection molded plastic and the V-shaped clasp 40b is 15 compressible upon swinging the clasp into the receptacle 16 in the case. This allows a wedqe-shaped projection 96 on the clasp 40b to clear and snap into engagement behind an L-shaped latch 98.
Further details of the disposable IV tubing 20 apparatus 14 are visible in Fig. 9. The coupling 56 is received in a slot in a bracket 102 which extends from the underside of the exterior wall of the door 40 near the clasp 40b. The coupling 56 is solvent, welded or bonded to the bracket 102. The couplinq 58 25 is similarly received in another recess formed in the hook-shaped member 40a. Again the coupling 58 is solvent bonded to the member 40a. A magnet 106 (Fig.
9) is attached to the bracket 102 and detected by a Hall effect switch ln8 (Fig. 3) adjacent the 30 receptacle 16. The Hall effect switch is connected to the micro-controller hereafter described so that the output thereof will indicate whether or not a disposable has been correctly loaded into the case 12.
Backqround Art It is often necessary to intravenously supply patients with pharmaceutically active liquids over a long period of time at a controlled rate. It is desirable that this be accomplished while the patient is in an ambulatory state.
The prior art includes devices that employ a bag filled with fluid medication that feeds by gravity through IV tubing having drip or other controllers. It is difficult for a patient to be ambulatory with a gravity fed infusion device and flow control is very limited.
Another prior art infusion apparatus comprises an elastic bladder forming a liquid container mounted in an elongated cylindrical housing, a flow control valve, and tubing for supply of the liquid to the patient. The elastic walls of the bladder expand along the walls of the cylindrical housing when filled with the liquid, and provide the pressure for B
W O 91/16933 PC~r/US91/02930 expelling the liquid. The bladder is typically filled by hand with a syringe which often requires an inordinate amount of force. Another drawback is that the bladder is forced to expand into an unnatural 5 elongated configuration along the housing walls as it is filled. As a result of this unnatural configuration, the pressure of the bladder varies widely with the volume of liquid therein. Therefore, in most cases this type of elastic infusion apparatus 10 does not have a reasonablv stable pressure and flow rate over the infusion period.
Most of such devices either have a flow rate that decreases with pressure, which decreases with volume, or one that remains roughly constant until the end 15 where it surges. Attempts have been made to control pressure and flow rates bv means of complicated and expensive flow control valves and devices. Other approaches have utilized exotic and expensive elastic materials in an effort to control the pressures and 20 flow rates.
Another type of infusion apparatus emplovs a peristaltic or other positive displacement pump which is electrically driven. Programmable infusion pumps have been provided having the capability for precise 25 tailoring of the fluid delivery rate parameters in four different modes, namely, continuous, intermittent, PCA (patient controlled analgesic) and TPN (total parenteral nutrition). Originally such programmable infusion pumps were large and not well 30 suited for ambulatory patients. They used complex and expensive replacement pump cartridges to maintain sterilitv. More recently, small proqrammable infusion pumps have been available with disposable plastic cartridges that engaae a peristaltic pump. However b ; ~
.. . .
:. ~
20~0370 such cartridges have been bulky and expensive and have required excessive drive power in the pumps, leading to rapid battery drain.
Accordingly, it would be desirable to provide an 5 improved disposable infusion apparatus and pump for delivering intravenous drugs at a controlled rate to an ambulatory patient.
Disclosure of Invention It is therefore the primary object of the present invention to provide an improved disposable infusion apparatus and pump for delivering intravenous drugs at a controlled rate to an ambulatory patient.
In accordance with our invention a disposable 15 infusion apparatus includes proximal, distal and intermediate segments of IV tubing connected via couplings. The intermediate segment has a length sufficient for operative engagement with a pumpins member of a peristaltic pump throughout a pumping 20 stroke thereof. The intermediate segment further has a maximum Durometer of seventy-five on the Shore A
scale. The pumping member includes a plurality of fingers mounted in side-by-side substantially parallel relationship for individual reciprocation. Motor 25 driven cams individually reciprocate respective ones of the fingers in a predetermined timed sequence so that when the linearly disposed intermediate segment is squeezed by the fingers, intravenous fluid in the tubing will be pumped therethrough. The disposable 30 apparatus further includes a door connected to opposite ends of the intermediate segment and which is releasably loadable in a case to place the intermediate segment into operative engagement with the pumping member.
WO9t/16933 PCT/~iS91/02930 20~037~ _4_ ~rief Description of Drawings The above and other objects and advantages of the present invention will become apparent from the following description when read in conjunction with 5 the accompanying drawings wherein:
- Fig. l illustrates a programmable infusion system in phantom lines with a preferred embodiment of our disposable apparatus loaded therein. The disposable is shown connected to conventional IV tubing segments, an lO IV bag, a spike connector and a leur fitting. The IV
tubing segments are broken at various locations to make this figure more compact.
Fiq. 2 is an enlarged fragmentary view of the programmable infusion system with the disposable l5 apparatus installed therein and showing its relationship to a preferred embodiment of our peristaltic pump.
Fig. 3 is a further enlarged view of the peristaltic pump and the door of the disposable. The 20 IV tubing segments are not shown in this figure.
Fig. 4 is an enlarged view of the three seqments of tubing that form part of the disposable.
Fig. 5 is an enlarged side elevation view of one of the fingers of the peristaltic pump showing how it 25 squeezes shut the intermediate tubing segment of the disposable.
Fig. 6 is a side elevation view of one of the cam wheels of the peristaltic pump. The motion of the cam wheel is illustrated in phantom lines.
Figs. 7-9 illustrate details of the disposable door, tube clamp and IV tubing couplings.
W O 91/16933 PC~r/~S91/02930 2~80370 - Best Mode for Carrying Out the Invention Referring to Fig. 1, a programmable infusion system 10 is illustrated which is adapted to utilize our disposable infusion apparatus and peristaltic 5 pump. It includes a compact, portable rectangular case 12. By way of example, the case may be made of iniection molded plastic and may measure approximately seven inches in length by approximatelv three and one-half inches in width (right side in Fig. 1) by 10 approximately one inch in thickness (right side in Fig. 1).
The preferred embodiment of our disposable IV
tubing apparatus 14 (Fig. 2) may be releasably loaded or installed in a receptacle 16 (Fig. 2) in a long 15 side edge of the case 12. The proximal end disposable IV tubing apparatus 14 is connected to a conventional spike 20 (Fig. 1). The patient inserts the spike into a conventional bag 22 of intravenous fluid in which the desired medications are dissolved. The distal end 20 of the disposable IV tubing apparatus 14 is connected to a conventional male leur fitting 26 which in turn connects to a conventional IV catheter (not illustrated). A disposable IV fluid conveying means is a necessary requirement in an infusion system since 25 it ensures sterility. It also prevents residual amounts of medication from one IV drug administration from being inadvertentlY delivered when a new IV drug administration commences.
Referring to Fig. 2, the preferred embodiment of 30 our peristaltic pump 30 is mounted inside the case 12 adjacent the receptacle 16. A pumping member 32 of the pump engages a linearly disposed intermediate segment 34 of the disposable IV tubing apparatus 14.
The pumping member 32 comprises nine individual 20~0370 fingers 32a which slide back and forth toward and away from the intermediate IV tubing segment 34. The fingers 32a are moved by corresponding cam wheels 36 (Fig. 6). A flexible boot 33 (Fig. 2) surrounds the 5 fingers and forms an interface between the fingers and the intermediate segment 34 of IV tubing. The peripheral edges of this boot are sealed to internal walls of the case to protect the pump from contamination. Each cam wheel 36 (Fig. 5) has a 10 splined mounting hole 37 therethrough which is offset from the center of the wheel. Each finger 32a comprises a rectangular block having a circular hole in which a corresponding one of the cam wheels 36 rotates. The hole has a diameter slightly larger than 15 the outside diameter of the wheel so that the wheel can rotate inside the hole and thereby pull the finger back and forth. The motion of one of the cam wheels is illustrated in phantom lines in Fig. 6.
The cam wheels 36 are mounted on a splined shaft 20 38 in progressive, offset alignment for individually reciprocating respective ones of the fingers 32a in a predetermined, timed sequence. The linearly disposed segment 34 of IV tubing is progressively squeezed by the fingers 32a so that intravenous fluid in the 25 tubing is pumped therethrough.
The intermediate IV tubing segment 34 is preferably made of vinyl or silicone and has a maximum Durometer of seventv-five measured on the Shore A
scale. By using a highly pliant, non-stiff resilient 30 flexible tubing segment of this type, it is possible for the individual fingers 32a of the peristaltic pump 30 to each squeeze off and completely close the tubing segment during one cycle of its respective cam wheel.
This squeezing off is illustrated in Fig. 5. This ~.
, ,~
20~0370 ensures a true positive displacement pump in which a single rotation of the splined shaft 38 will cause a predetermined volume of fluid to be pumped through the disposable IV tubing apparatus 14. Having such a 5 non-stiff disposable IV tubing apparatus 14 also ensures that less torque is required to rotate the splined shaft 38, thereby resulting in an overall reduction in energy consumption when the peristaltic pump is electrically driven from battery power as 10 hereafter described.
The fingers 32a preferably have small teats 32b (Fig. 5) projecting from the ends thereof. These teats engage and squeeze the intermediate IV tubing segment 34. It has been determined that these teats 15 ensure that the tubing segment 34 will be completely squeezed off during each cycle of each finger. It is important to understand that the intermediate tubing segment 34 must have a minimum amount of stiffness and resilience or else it will not open and close in a 20 manner that will permit it to function as a peristaltic pump. Preferably the tubing segment 34 has a minimum Durometer of thirty-five measured on the Shore A scale.
Referring again to Fig. 2, the programmable 25 infusion system 10 includes means for releasably mounting the intermediate IV tubing segment 34 adjacent the pumping member 32. The intermediate tubing segment 34 is mounted to a door 40 having a hook-shaped member 40a (Fig. 3) at one end and a 30 compressible clasp 40b at the other end. The hook-shaped member 40a of the door may be engaged by the patient with a shoulder 16a (Fig. 2) located at one end of the receptacle 16 in the case 12. The other end of the door is then swung in and the clasp ~ i ~J,, 2~)370 -40b snaps into the other end of the receptacle 16.
The intermediate IV tubing segment 34 is squeezed between the individual fingers 32a and a compressible, resilient pad 42 (Figs. 3 and 5) supported by the 5 innerside of the door 40. This pad mav be made of polyurethane foam.
The shaft 38 (Fig. 3) which supports the cam wheels 36 is journaled at opposite ends in ball bearings 44. A gear 46 rigidly mounted on one end of 10 the shaft 38 meshes with another gear 48 (Fig. 2) rigidly mounted on another shaft 50 of a DC motor module 51 having an internal 141:1 gear reduction. In other words, one-hundred and forty-one rotations of the armature of the DC motor turns the shaft 50 one 15 revolution and thus the cam shaft 38 one revolution.
Referring to Fig. 4, the disposable IV tubing apparatus 14 has a proximal tubing segment 52 and a distal tubing segment 54 connected to opposite ends of the intermediate IV tubing segment 34 by means of 20 couplings 56 and 58. These couplings are attached to the underside of the door 40 as hereafter described in conjunction with Fig. 9.
Referring to Fig. 4, the intermediate IV tubing segment 34 preferably has an inside diameter of 25 approximately 0.125 inches. Silicone and VINYL tubing can be commercially obtained having the desired stiffness. The proximal segment 52 and the distal segment 54 are each preferably made of clear polyvinyl chloride (PVC) having an outside diameter of 30 approximately 0.140 inches and an inside diameter of approximately .088 inches. This clear PVC tubing is larger in both inside and outside diameter than the conventional PVC tubing segments 55a and 55b (Fig. 1) ~,' W O 91/16933 PCVr/~S91/02930 2o8o~7o _g_ which connect the segments 52 and 54 to the spike 20 and male lure fitting 26, respectively.
In an actual prototype of our preferred embodiment, the designed maximum delivery rate is 5 approximately three hundred milliliters per hour. The minimum desiqned delivery rate is apProximatelv 0.1 milliliters per hour. The delivery resolution is approximately 0.1 milliliters per hour for .01 through 99.9 milliliters per hour and approximately one 10 milliliter per hour for approximately one hundred to three hundred milliliters per hour. In the prototype, the desiqned maximum volume to be infused (VT~I) is one thousand milliliters and the minimum volume to be infused (VTBI) is approximately 0.1 milliliters. The 15 designed "keep vein open" (KVO) rate is approximately one milliliter per hour for one through three hundred milliliter per hour rates and approximately 0.1 through 0.99 milliliters per hour for 0.1 through 0.99 milliliter per hour rates.
Referring to Fig. 7, the door 40 hac a rectangular aperture 90 formed adjacent the hook-shaped member 40a. A resilient metal tubing squeezer 92 has an upper end 92a which is tightly received in the aperture 90 in the door 40. The 25 squeezer 92 has a pair of parallel downwardly extending arms which terminate in coiled sections 92b. Referring to Fig. 8, when the disposable is assembled, the intermediate segment 34 is squeezed shut between the coiled sections 92b. When the door 30 40 is installed into the receptacle 16 of the case 12, the hook-shaped member 40a is engaaed with the shoulder 16a (Fig. 2). The other end of the door having the clasp 40b is then swung toward the case.
As this happens, the coiled sections 92b of the tubing W O 91/16933 PC~r/US91~02930 208037 ~ -ln-squeezer 92 engage upstandinq projections 94 (Fig. 8) in the receptacle. These projections are spaced so that the coiled sections are displaced outwardly awav from the intermediate tubing segment 34 thereb~7 5 unclamping the same. This is illustrated in phantom lines in Fig. 8. The squeezér performs a very important function. Namely, if the disposable IV
tubing apparatus 14 should be inadvertently removed from the case 12 it will squeeze off the intermediate 10 tubing section 34 and prevent free flow of intravenous fluid by gravity action.
Referring to Fig. 3, the clasp 40b consists of a V-shaped element. The door 40 is preferably made of injection molded plastic and the V-shaped clasp 40b is 15 compressible upon swinging the clasp into the receptacle 16 in the case. This allows a wedqe-shaped projection 96 on the clasp 40b to clear and snap into engagement behind an L-shaped latch 98.
Further details of the disposable IV tubing 20 apparatus 14 are visible in Fig. 9. The coupling 56 is received in a slot in a bracket 102 which extends from the underside of the exterior wall of the door 40 near the clasp 40b. The coupling 56 is solvent, welded or bonded to the bracket 102. The couplinq 58 25 is similarly received in another recess formed in the hook-shaped member 40a. Again the coupling 58 is solvent bonded to the member 40a. A magnet 106 (Fig.
9) is attached to the bracket 102 and detected by a Hall effect switch ln8 (Fig. 3) adjacent the 30 receptacle 16. The Hall effect switch is connected to the micro-controller hereafter described so that the output thereof will indicate whether or not a disposable has been correctly loaded into the case 12.
3 PCr/l.'S91/02930 The peristaltic pump 30 is a single channel, linear peristaltic pump having nine reciprocating ingers 32a. The intermediate IV tubing segment 34 is highly flexible as previously indicated. In a preferred 5 embodiment of the disposable 14, the intermediate IV
tubing segment 34 is made of silicone and has an inside diameter of approximately 0.125 inches.
Approximately 0.12 milliliters of intravenous fluid are pumped through the intermediate IV tubing segment 10 34 for each single revolution of pump shaft 38. The combined motor and gear reduction module 51 also preferably includes a built-in motor encoder. One suitable unit is the MICRO-MO Model 1624006S. It uses TEFLON (Trademark) fixotropic lubricant. A
15 conventional Robert's clamp 23 (Fig. 1) may be provided on the segment of conventional IV tubing 55b for closing off the same.
While we have described preferred embodiments of our improved disposable infusion apparatus and 20 peristaltic pump for use therewith, it should be understood that modifications and adaptations thereof will occur to persons skilled in the art. Therefore, the protection afforded our invention should only be limited in accordance with the scope of the following 25 claims.
tubing segment 34 is made of silicone and has an inside diameter of approximately 0.125 inches.
Approximately 0.12 milliliters of intravenous fluid are pumped through the intermediate IV tubing segment 10 34 for each single revolution of pump shaft 38. The combined motor and gear reduction module 51 also preferably includes a built-in motor encoder. One suitable unit is the MICRO-MO Model 1624006S. It uses TEFLON (Trademark) fixotropic lubricant. A
15 conventional Robert's clamp 23 (Fig. 1) may be provided on the segment of conventional IV tubing 55b for closing off the same.
While we have described preferred embodiments of our improved disposable infusion apparatus and 20 peristaltic pump for use therewith, it should be understood that modifications and adaptations thereof will occur to persons skilled in the art. Therefore, the protection afforded our invention should only be limited in accordance with the scope of the following 25 claims.
Claims (19)
1. An infusion apparatus comprising in combination:
a portable hand held peristaltic pump mounted in a case, the case having an open receptacle within the case and an opening extending from the receptacle into the case, and the pump having a plurality of reciprocable pumping fingers disposed adjacent and extending to said opening in said case;
a unitary door and support member for direct support of an intermediate segment of IV tubing and having detachable hook shaped hinge means on one end thereof for engaging shoulder means in one end of said receptacle and releasable V-shaped latch means on the other end thereof for engaging shoulder means in the other end of said receptacle, said unitary door and support member being detachably mounted in a substantially fully recessed positioned within said receptacle and covering said opening;
an intermediate segment of IV tubing having a maximum Durometer of seventy-five on the Shore A
scale mounted directly on said door for positioning over said opening for operative engagement with said pumping fingers of the peristaltic pump, the intermediate segment having a length sufficient for operative engagement with said pumping fingers of the peristaltic pump throughout a pumping stroke thereof;
a proximal segment of IV tubing connected to a first end of the intermediate segment of IV
tubing; and a distal segment of IV tubing connected to a second end of the intermediate segment of IV tubing.
a portable hand held peristaltic pump mounted in a case, the case having an open receptacle within the case and an opening extending from the receptacle into the case, and the pump having a plurality of reciprocable pumping fingers disposed adjacent and extending to said opening in said case;
a unitary door and support member for direct support of an intermediate segment of IV tubing and having detachable hook shaped hinge means on one end thereof for engaging shoulder means in one end of said receptacle and releasable V-shaped latch means on the other end thereof for engaging shoulder means in the other end of said receptacle, said unitary door and support member being detachably mounted in a substantially fully recessed positioned within said receptacle and covering said opening;
an intermediate segment of IV tubing having a maximum Durometer of seventy-five on the Shore A
scale mounted directly on said door for positioning over said opening for operative engagement with said pumping fingers of the peristaltic pump, the intermediate segment having a length sufficient for operative engagement with said pumping fingers of the peristaltic pump throughout a pumping stroke thereof;
a proximal segment of IV tubing connected to a first end of the intermediate segment of IV
tubing; and a distal segment of IV tubing connected to a second end of the intermediate segment of IV tubing.
2. A disposable infusion apparatus according to claim 1 wherein the intermediate segment of IV tubing is made of a material selected from the group consisting of vinyl and silicone.
3. A disposable infusion apparatus according to claim 1 wherein the intermediate segment of IV tubing has a minimum Durometer of thirty-five on the Shore A scale.
4. A disposable infusion apparatus according to claim 1 wherein the proximal segment of IV tubing is made of polyvinyl chloride.
5. A disposable infusion apparatus according to claim 1 wherein the distal segment of IV tubing is made of polyvinyl chloride.
6. A disposable infusion apparatus according to claim 1 wherein the hinge means includes a hook-shaped member.
7. A disposable infusion apparatus according to claim 1 wherein said peristaltic pump comprises:
means for mounting said plurality of fingers in side-by-side substantially parallel relationship for individual reciprocation;
cam means for individually reciprocating respective ones of the fingers in a predetermined time sequence to that when a linearly disposed segment of IV tubing is squeezed by the fingers intravenous fluid in the tubing will be pumped therethrough; and motor means for driving the cam means.
means for mounting said plurality of fingers in side-by-side substantially parallel relationship for individual reciprocation;
cam means for individually reciprocating respective ones of the fingers in a predetermined time sequence to that when a linearly disposed segment of IV tubing is squeezed by the fingers intravenous fluid in the tubing will be pumped therethrough; and motor means for driving the cam means.
8. A disposable infusion apparatus according to claim 7 further comprising a flexible boot surrounding the fingers and forming an interface between the fingers and the segment of IV tubing.
9. A disposable infusion apparatus according to claim 8 wherein each finger has a ridge projecting therefrom for engaging the segment of IV tubing and ensuring the complete squeezing off thereof.
10. A disposable infusion apparatus according to claim 9 wherein the cam means includes a splined shaft and a plurality of identical cam wheels, each cam wheel having a splined mounting hole therethrough offset from a center of the wheel and the wheels being mounted on the splined shaft in progressive offset alignment for individually engaging and reciprocating respective ones of the fingers in the predetermined timed sequence.
11. A disposable infusion apparatus comprising in combination:
a portable hand held peristaltic pump mounted in a portable case, the case having an elongated open receptacle in one side thereof and an opening extending from the receptacle into the case, and the pump having a plurality of reciprocable pumping fingers disposed in said case adjacent and extendable through said opening in said case into said elongated receptacle;
an elongated unitary door and support member for direct support of an intermediate segment of IV
tubing and being detachably mounted in a substantially fully recessed position within said receptacle and having a planar backing wall covered by a compressible resilient pad for positioning over said opening, a hook-shaped hinge member on one end of said door for engaging a shoulder in one end of said receptacle, a V-shaped releasable latch clamp on the other end of said door for releasably engaging a latching shoulder in the other end of said receptacle;
an intermediate segment of IV tubing having a minimum Durometer of thirty-five and a maximum Durometer of seventy-five on the Shore A scale mounted on said door over said planar backing wall for positioning over said opening when said elongated unitary door and support member is mounted within said receptacle and having a length sufficient for operative engagement with the pumping fingers of the peristaltic pump throughout a pumping stroke thereof and being squeezed between said resilient pad on said backing surface and said pumping fingers;
an elongated proximal segment of IV tubing;
means for connecting an end of the proximal segment of IV tubing to a first end of the intermediate segment of IV tubing;
an elongated distal segment of IV tubing; and a means for connecting an end of the distal segment of IV tubing to a second end of the intermediate segment of IV tubing.
a portable hand held peristaltic pump mounted in a portable case, the case having an elongated open receptacle in one side thereof and an opening extending from the receptacle into the case, and the pump having a plurality of reciprocable pumping fingers disposed in said case adjacent and extendable through said opening in said case into said elongated receptacle;
an elongated unitary door and support member for direct support of an intermediate segment of IV
tubing and being detachably mounted in a substantially fully recessed position within said receptacle and having a planar backing wall covered by a compressible resilient pad for positioning over said opening, a hook-shaped hinge member on one end of said door for engaging a shoulder in one end of said receptacle, a V-shaped releasable latch clamp on the other end of said door for releasably engaging a latching shoulder in the other end of said receptacle;
an intermediate segment of IV tubing having a minimum Durometer of thirty-five and a maximum Durometer of seventy-five on the Shore A scale mounted on said door over said planar backing wall for positioning over said opening when said elongated unitary door and support member is mounted within said receptacle and having a length sufficient for operative engagement with the pumping fingers of the peristaltic pump throughout a pumping stroke thereof and being squeezed between said resilient pad on said backing surface and said pumping fingers;
an elongated proximal segment of IV tubing;
means for connecting an end of the proximal segment of IV tubing to a first end of the intermediate segment of IV tubing;
an elongated distal segment of IV tubing; and a means for connecting an end of the distal segment of IV tubing to a second end of the intermediate segment of IV tubing.
12. A disposable infusion apparatus according to claim 11 wherein the intermediate segment of IV tubing is made of a material selected from the group consisting of vinyl and silicone.
13. A disposable infusion apparatus according to claim 12 wherein the proximal segment and the distal segment of IV
tubing is made of polyvinyl chloride.
tubing is made of polyvinyl chloride.
14. A disposable infusion apparatus according to claim 11 wherein the intermediate segment of IV tubing is made of silicone rubber.
15. A disposable infusion apparatus for use with a peristaltic pump, comprising:
a proximal segment of IV tubing;
a distal segment of IV tubing;
an intermediate segment of IV tubing having a maximum Durometer of seventy-five on the Shore A
scale, the intermediate segment having a length sufficient for operative engagement with a pumping member of a peristaltic pump throughout a pumping stroke thereof;
a first coupling connecting a first end of the proximal segment of IV tubing to a first end of the intermediate segment of IV tubing;
a second coupling connecting a first end of the distal segment of IV tubing to a second end of the intermediate segment of IV tubing;
. ~
means for releasably mounting the intermediate segment adjacent the pumping member comprising a door secured to the first and second ends of the intermediate segment of IV tubing, and releasably engagable with a portion of a case defining a receptacle for positioning the intermediate segment of IV tubing in engagement with the pumping member of the peristaltic pump when it is mounted in the case adjacent the receptacle;
hinge means on a first end of said door for engaging the portion of the case defining the receptacle at a first end thereof for permitting a second end of the door means to swing toward and away from the case; and tube squeezer means connected to the door for normally squeezing the intermediate segment of IV
tubing shut and actuable upon engagement with the case to open the intermediate segment of IV
tubing.
a proximal segment of IV tubing;
a distal segment of IV tubing;
an intermediate segment of IV tubing having a maximum Durometer of seventy-five on the Shore A
scale, the intermediate segment having a length sufficient for operative engagement with a pumping member of a peristaltic pump throughout a pumping stroke thereof;
a first coupling connecting a first end of the proximal segment of IV tubing to a first end of the intermediate segment of IV tubing;
a second coupling connecting a first end of the distal segment of IV tubing to a second end of the intermediate segment of IV tubing;
. ~
means for releasably mounting the intermediate segment adjacent the pumping member comprising a door secured to the first and second ends of the intermediate segment of IV tubing, and releasably engagable with a portion of a case defining a receptacle for positioning the intermediate segment of IV tubing in engagement with the pumping member of the peristaltic pump when it is mounted in the case adjacent the receptacle;
hinge means on a first end of said door for engaging the portion of the case defining the receptacle at a first end thereof for permitting a second end of the door means to swing toward and away from the case; and tube squeezer means connected to the door for normally squeezing the intermediate segment of IV
tubing shut and actuable upon engagement with the case to open the intermediate segment of IV
tubing.
16. A disposable infusion apparatus according to claim 15 wherein said tube squeezer means comprises a plurality of reciprocable pumping fingers and wherein said peristaltic pump comprises:
means for mounting said plurality of fingers in side-by-side substantially parallel relationship for individual reciprocation;
cam means for individually reciprocating respective ones of the fingers in a predetermined timed sequence so that when a linearly disposed segment of IV tubing is squeezed by one of said fingers, intravenous fluid in the tubing will be pumped therethrough; and motor means for driving the cam means.
means for mounting said plurality of fingers in side-by-side substantially parallel relationship for individual reciprocation;
cam means for individually reciprocating respective ones of the fingers in a predetermined timed sequence so that when a linearly disposed segment of IV tubing is squeezed by one of said fingers, intravenous fluid in the tubing will be pumped therethrough; and motor means for driving the cam means.
17. A disposable infusion apparatus according to claim 16 further comprising a flexible boot surrounding said fingers and forming an interface between said fingers and the segment of IV tubing.
18. A disposable infusion apparatus according to claim 17 wherein each of said fingers has a ridge projecting therefrom for engaging the segment of IV tubing and ensuring the complete squeezing off thereof.
19. A disposable infusion apparatus according to claim 18 wherein the cam means includes a splined shaft and a plurality of identical cam wheels, each cam wheel having a splined mounting hole therethrough offset from a center of the wheel, and the wheels being mounted on the splined shaft in progressive offset alignment for individually engaging and reciprocating respective ones of the fingers in the predetermined timed sequence.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51877790A | 1990-05-04 | 1990-05-04 | |
| US07/518,777 | 1990-05-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2080370A1 CA2080370A1 (en) | 1991-11-05 |
| CA2080370C true CA2080370C (en) | 1998-07-14 |
Family
ID=24065459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2080370 Expired - Fee Related CA2080370C (en) | 1990-05-04 | 1991-04-29 | Disposable infusion apparatus with peristaltic pump |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0527868A4 (en) |
| JP (1) | JPH05507007A (en) |
| CA (1) | CA2080370C (en) |
| WO (1) | WO1991016933A1 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5221268A (en) * | 1991-12-06 | 1993-06-22 | Block Medical, Inc. | Multiple dose control apparatus |
| DE29604737U1 (en) * | 1996-03-14 | 1997-07-17 | B. Braun Melsungen Ag, 34212 Melsungen | Infusion pump as a peristaltic pump |
| AU2893899A (en) * | 1999-03-03 | 2000-09-21 | Sims Deltec, Inc. | A pump pressure plate and method for mounting thereof |
| IL165365A0 (en) | 2004-11-24 | 2006-01-15 | Q Core Ltd | Finger-type peristaltic pump |
| US8308457B2 (en) | 2004-11-24 | 2012-11-13 | Q-Core Medical Ltd. | Peristaltic infusion pump with locking mechanism |
| IL179231A0 (en) | 2006-11-13 | 2007-03-08 | Q Core Ltd | A finger-type peristaltic pump comprising a ribbed anvil |
| IL179234A0 (en) | 2006-11-13 | 2007-03-08 | Q Core Ltd | An anti-free flow mechanism |
| US8535025B2 (en) | 2006-11-13 | 2013-09-17 | Q-Core Medical Ltd. | Magnetically balanced finger-type peristaltic pump |
| US8371832B2 (en) | 2009-12-22 | 2013-02-12 | Q-Core Medical Ltd. | Peristaltic pump with linear flow control |
| US8142400B2 (en) | 2009-12-22 | 2012-03-27 | Q-Core Medical Ltd. | Peristaltic pump with bi-directional pressure sensor |
| WO2011128850A2 (en) | 2010-04-12 | 2011-10-20 | Q Core Medical Ltd | Air trap for intravenous pump |
| JP5244896B2 (en) * | 2010-12-03 | 2013-07-24 | Ｊｕｎｋｅｎ Ｍｅｄｉｃａｌ株式会社 | Device for blood transfusion / infusion or blood purification and method for detecting defective suction of pump in the device |
| US9674811B2 (en) | 2011-01-16 | 2017-06-06 | Q-Core Medical Ltd. | Methods, apparatus and systems for medical device communication, control and localization |
| US9726167B2 (en) | 2011-06-27 | 2017-08-08 | Q-Core Medical Ltd. | Methods, circuits, devices, apparatuses, encasements and systems for identifying if a medical infusion system is decalibrated |
| US9855110B2 (en) | 2013-02-05 | 2018-01-02 | Q-Core Medical Ltd. | Methods, apparatus and systems for operating a medical device including an accelerometer |
| US11446431B2 (en) * | 2019-11-14 | 2022-09-20 | Zevex, Inc. | Infusion pump apparatus having convex platen surface |
| ES2933693T3 (en) | 2019-11-18 | 2023-02-13 | Eitan Medical Ltd | Rapid test for medical pump |
| CN111317886A (en) * | 2020-03-31 | 2020-06-23 | 张家港龙医医疗器械有限公司 | Infusion system of electronic infusion pump |
| CN114618027B (en) * | 2022-01-07 | 2025-07-04 | 浙江大学 | Automatic squeezing and flow rate monitoring device with chest tube |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4493706A (en) * | 1982-08-12 | 1985-01-15 | American Hospital Supply Corporation | Linear peristaltic pumping apparatus and disposable casette therefor |
| US4653987A (en) * | 1984-07-06 | 1987-03-31 | Tsuyoshi Tsuji | Finger peristaltic infusion pump |
| US4565542A (en) * | 1984-10-19 | 1986-01-21 | Deltec Systems, Inc. | Locking mechanism for a drug delivery system |
| US4617014A (en) * | 1985-11-26 | 1986-10-14 | Warner-Lambert Company | Dual mode I. V. infusion device |
| US4671792A (en) * | 1986-02-18 | 1987-06-09 | American Hospital Supply Corporation | Pressure-regulating peristaltic pump |
| US4976590A (en) * | 1988-06-08 | 1990-12-11 | Baldwin Brian E | Fluid conduit-responsively adjustable pump arrangement and pump/conduit arrangement and method, and fluid conduits therefor |
| DE69033292T2 (en) * | 1989-07-31 | 2000-01-05 | Terumo K.K., Tokio/Tokyo | Peristaltic pump |
| US4997347A (en) * | 1990-01-12 | 1991-03-05 | Autotrol Corporation | Peristaltic motor |
-
1991
- 1991-04-29 JP JP91508693A patent/JPH05507007A/en active Pending
- 1991-04-29 EP EP19910909243 patent/EP0527868A4/en not_active Ceased
- 1991-04-29 WO PCT/US1991/002930 patent/WO1991016933A1/en not_active Application Discontinuation
- 1991-04-29 CA CA 2080370 patent/CA2080370C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0527868A4 (en) | 1993-09-22 |
| CA2080370A1 (en) | 1991-11-05 |
| JPH05507007A (en) | 1993-10-14 |
| WO1991016933A1 (en) | 1991-11-14 |
| EP0527868A1 (en) | 1993-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5165874A (en) | Disposable infusion apparatus and peristaltic pump for use therewith | |
| CA2080370C (en) | Disposable infusion apparatus with peristaltic pump | |
| US7128727B2 (en) | Components and methods for patient infusion device | |
| ES2316790T3 (en) | DISPENSER FOR A PATIENT PERFUSION DEVICE. | |
| AU2003212758B2 (en) | Ambulatory infusion membrane pump | |
| US4273121A (en) | Medical infusion system | |
| EP1427471B1 (en) | Plunger for patient infusion device | |
| US5078683A (en) | Programmable infusion system | |
| US5378126A (en) | Diaphragm cassette for solution pumping system | |
| US4813937A (en) | Ambulatory disposable infusion delivery system | |
| EP2548595B1 (en) | Portable infusion pumps of the skin-patch type | |
| EP0555007B1 (en) | Drug delivery system | |
| US20080051697A1 (en) | Infusion medium delivery device and method with compressible or curved reservoir or conduit | |
| CN112566680A (en) | Ambulatory infusion pump and assembly for use therewith | |
| CA2227859C (en) | Volumetric pump with bi-directional sphincter seal | |
| CA3092686C (en) | Medical infusion pump for delivery of a fluid | |
| US6224572B1 (en) | Piston-actuated attachable topical fluid delivery system | |
| AU2002331800A1 (en) | Plunger for patient infusion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |