CN105597186B - Free flow prevention device for feeding pump - Google Patents
Free flow prevention device for feeding pump Download PDFInfo
- Publication number
- CN105597186B CN105597186B CN201610089518.6A CN201610089518A CN105597186B CN 105597186 B CN105597186 B CN 105597186B CN 201610089518 A CN201610089518 A CN 201610089518A CN 105597186 B CN105597186 B CN 105597186B
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- Prior art keywords
- valve
- feeding pump
- rotor
- shell
- limiting
- Prior art date
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- 230000002265 prevention Effects 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 238000001802 infusion Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 4
- 230000035764 nutrition Effects 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 208000035943 Aphagia Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Images
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
-
- 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
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16804—Flow controllers
-
- 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
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16877—Adjusting flow; Devices for setting a flow rate
- A61M5/16881—Regulating valves
-
- 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
- A61M2005/14208—Pressure infusion, e.g. using pumps with a programmable infusion control system, characterised by the infusion program
Landscapes
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a free flow prevention device for a feeding pump, which comprises a switch valve and a locking mechanism, wherein the switch valve is arranged on the feeding pump; the switch valve comprises a liquid inlet joint and a liquid outlet joint; the liquid inlet joint is connected with a transfusion conduit from a feeding pump liquid feeding wheel; the locking mechanism is used for locking the switch valve on the shell of the feeding pump when the switch valve is in a conducting state, and can release the locking of the switch valve when the switch valve is in an off state, so that the switch valve can be taken down from the shell of the feeding pump. The locking mechanism of the invention can ensure that the switch valve can be taken down from the shell of the feeding pump only when the switch valve is in an off state, and the switch valve is locked on the shell of the feeding pump when the switch valve is in an on state, so that the infusion catheter between the feeding wheel connected with the liquid inlet joint of the switch valve and a patient is also firmly fixed on the shell of the feeding pump when feeding, thereby preventing the phenomenon of free flow of liquid.
Description
Technical Field
The present invention relates to a feeding device for providing nutrition and medication to a patient.
Background
The feeding pump is used to provide nutrition and food to a patient when the patient is unable to eat for various reasons. The feeding pump mainly comprises a shell, an infusion tube component, a pump mechanism and the like. The infusion tube component comprises a dropping funnel, the dropping funnel is connected with the storage container and is fixed in a positioning groove on the shell. An infusion catheter connected to the infusion tube assembly of the drip chamber passes through the feeding wheel of the pump mechanism and is inserted intravenously into the patient. Rollers on the applicator wheel apply pressure to the infusion tube to regulate the amount and rate of delivery of fluid from the reservoir to the patient. The feed wheel may be rotated by a motor of the pump mechanism, the number of rollers on the feed wheel typically being three.
In prior art feeding pumps, the tubing between the wheel and the patient is typically held in a detent in the housing, but this holding is not secure and can occur in the event that the tubing slips out of the detent during the infusion process. Free flow of fluid often occurs when the tubing between the applicator wheel and the patient slips. At this time, the liquid introduced into the patient is controlled only by gravity, which causes a large amount of liquid to be introduced into the patient in a short time, thereby inducing medical accidents and even causing death of the patient.
Disclosure of Invention
The invention aims to provide a free flow prevention device for a feeding pump, which can ensure that an infusion catheter between a feeding wheel of the feeding pump and a patient is firmly fixed on a shell of the feeding pump during feeding.
In order to solve the technical problems, the invention adopts the technical scheme that:
the feeding pump is provided with a free flow prevention device which comprises a switch valve and a locking mechanism; the switch valve comprises a liquid inlet joint and a liquid outlet joint; the liquid inlet joint is connected with a transfusion conduit from a feeding pump liquid feeding wheel; the locking mechanism is used for locking the switch valve on the shell of the feeding pump when the switch valve is in a conducting state, and can release the locking of the switch valve when the switch valve is in an off state, so that the switch valve can be taken down from the shell of the feeding pump.
After the technical scheme is adopted, the invention at least has the following advantages:
1. the locking mechanism of the invention enables the switch valve to be taken down from the shell of the feeding pump only when the switch valve is in the off state, and locks the switch valve on the shell of the feeding pump when the switch valve is in the on state, so that the infusion catheter between the liquid feeding wheel connected with the liquid inlet joint of the switch valve and a patient is also firmly fixed on the shell of the feeding pump when feeding, thereby preventing the phenomenon of free flow of liquid;
2. in a preferred embodiment, the locking mechanism can be linked with the switch valve, and the automatic control of the locking mechanism can be realized through the controller, so that the operation is more convenient;
3. in a preferred embodiment, the locking mechanism consists of only the limit rotor and the stop cap, and is inexpensive to manufacture.
Drawings
Fig. 1 shows a schematic view of the assembly of an anti-free-flow device for a feeding pump according to an embodiment of the invention.
Fig. 2 shows an exploded view of an anti-free-flow device for a feeding pump according to an embodiment of the present invention.
Fig. 3 shows a schematic view of an anti-free-flow device for a feeding pump according to an embodiment of the invention, wherein the valve cover is removed and the restricting rotor is in a restricting position.
Fig. 4 shows a schematic view of an anti-free-flow device for a feeding pump according to an embodiment of the invention with the valve cover removed and the caging rotor in an unlocked position.
Fig. 5 shows a schematic structural view of a valve cover according to an embodiment of the present invention.
FIG. 6 illustrates a functional block diagram of a drive mechanism for an anti-free-flow device for a feeding pump, according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Please refer to fig. 1 to 4. The housing 91 of the feeding pump, drip chamber 92, applicator wheel 93 and infusion tube 94 are shown in fig. 1-4. The drip chamber 92 is connected to the storage container and is fixed in a positioning groove 911 on the housing 91. An infusion tube connected to a drip chamber passes through the wheel 93 and rollers 931 on the wheel 93 apply pressure to the infusion tube 94 to regulate the amount and rate of delivery of liquid from the storage container to the patient.
The anti-free-flow device for a feeding pump according to an embodiment of the present invention includes an on-off valve 1 and a lock mechanism.
The switch valve 1 includes a valve housing 11, a valve core 12, an inlet joint 13 and an outlet joint 14. The inlet connector 13 and the outlet connector 14 are arranged on the valve housing 11. The liquid inlet joint 13 is connected with an infusion conduit 94 from a feeding pump feeding wheel 93; the outlet connection 14 may be connected to the patient's vein by an infusion catheter. In this embodiment, the liquid inlet joint 13 and the liquid outlet joint 14 both extend in the vertical direction, the central axis of the liquid inlet joint 13 and the central axis of the liquid outlet joint 14 are located on the same straight line, and the liquid inlet joint 13 is located below the liquid outlet joint 14. The valve housing 11 has a valve cavity; a valve spool 12 is rotatably disposed within the valve chamber, the valve spool 12 being provided with a fluid passage. When the switch valve 1 is in a conducting state, the liquid inlet joint 13 of the valve shell is communicated with the liquid outlet joint 14 of the valve shell through the liquid channel of the valve core; when the switching valve 1 is in the off state, the fluid passage of the valve element 12 is disconnected from the inlet connection 13 of the valve housing.
The lock mechanism is used to lock the on-off valve 1 to the housing 91 of the feeding pump when the on-off valve 1 is in the on state, and to unlock the on-off valve 1 when the on-off valve 1 is in the off state, so that the on-off valve can be removed from the housing 91 of the feeding pump. In the present embodiment, the lock mechanism includes a position restricting rotor 21 and a stopper cover 22. The position restricting rotor 21 is connected to one end of the spool 12 and is rotatable together with the spool 12. The other end of the valve core 12 is provided with a handle 15. The stopper cap 22 may be fixed to the housing 91 of the feeding pump by means of adhesive, screws, etc., and the stopper cap 22 is provided with a central through hole 220.
The limit rotor 21 has a limit position and an unlock position. As shown in fig. 3, when the limit rotor 21 is rotated to the limit position, the on-off valve 1 is in the on state, and the limit rotor 21 is stopped by the stopper cover 22, thereby locking the on-off valve 1 to the housing 91 of the feeding pump. When the check rotor 21 is rotated to the unlock position, as shown in fig. 4, the on-off valve is in the off state, and the check rotor 21 can pass through the center through hole 220 of the check cover, so that the on-off valve 1 can be removed from the housing 91 of the feeding pump. The locking mechanism of the invention can ensure that the switch valve can be taken down from the shell of the feeding pump only when the switch valve is in an off state, and the switch valve is locked on the shell of the feeding pump when the switch valve is in an on state, so that the infusion catheter between the feeding wheel connected with the liquid inlet joint of the switch valve and a patient is also firmly fixed on the shell of the feeding pump when feeding, thereby preventing the phenomenon of free flow of liquid.
The spacing rotor 21 comprises a rotor body 211 and at least one interference arm 212 extending radially outwards from the peripheral wall of the rotor body. In the embodiment shown in the figures, the number of interference arms 212 is two, the two interference arms 212 being 180 ° from each other. The rotor body 211 is connected to one end of the spool 12.
Please refer to fig. 5. The stopper cover 22 includes a base 221 and a stopper wall 222, and one end of the stopper wall 222 is connected to a surface of the base 221 on a side away from the stopper rotor 21. The central through hole 220 of the stopper cover is provided on the base 221. When the limit rotor 221 is in the limit position, the interference arm 212 interferes with the base 221, so that the switch valve 1 cannot be removed from the housing 91 of the feeding pump. In the example shown, the central through hole 220 of the stopper cover has a shape that matches the shape of the check rotor when rotated to the unlocked position, so that the interference arm 212 no longer interferes with the base 221 when the check rotor is rotated to the unlocked position, and the check rotor 21 can pass through the central through hole 220 of the stopper cover.
The stopper wall 222 surrounds the valve housing 11, and the valve housing 11 is supported on the stopper cover 22. The stopper wall 222 has a first notch 223 through which the inlet connector 13 passes and a second notch 224 through which the outlet connector 14 passes, and a support portion for supporting the valve housing 11 is provided on an inner wall of the stopper wall 222. Wherein, two sides of the outer wall of the valve housing 11 are respectively provided with a supporting arm 113 extending outwards; the support portion is a pair of steps 226. The support arms 113 on both sides of the outer wall of the valve housing 11 are supported on a pair of steps 226, respectively.
Preferably, the anti-free flow device for the feeding pump comprises a drive mechanism for driving the rotation of the position limiting rotor 21. As shown in fig. 6, the drive mechanism includes a controller 31, a wheel 32, a wheel drive motor 33, and a motor drive circuit 34. The controller 31, wheel drive motor 33 and motor drive circuit 34 are disposed within the housing 91 of the feeding pump, and the wheel 32 is disposed outside the housing 91 of the feeding pump. The output end of the controller 31 is electrically connected with the input end of the motor driving circuit 34, the output end of the motor driving circuit 34 is electrically connected with the rotating wheel driving motor 33, and the output end of the rotating wheel driving motor 33 is connected with the rotating wheel 32 to drive the rotating wheel 32 to rotate; the runner 32 is connected with the position limiting rotor 21 and can drive the position limiting rotor 21 to rotate together. The controller 31 may be a PLC controller, for example.
The limit rotor 21 is provided with a positioning hole for accommodating the rotating wheel 32, and the rotating wheel 32 is inserted into the positioning hole and is in key connection with the positioning hole. In the example shown in the figure, the circumferential surface of the runner 32 is provided with spline grooves 321, and the positioning hole is provided with splines which are matched with the spline grooves 321. When the runner 32 rotates, the limit rotor 21 and the spool 12 rotate. Thus, the actions of the switch valve and the locking mechanism can be controlled by the controller, so that the operation is more convenient. In this embodiment, the surface of the housing 91 is further provided with a groove 912 in which the interference arm 212 rotates.
The foregoing description is further illustrative of the present invention with reference to the following detailed description and accompanying drawings. It will be apparent, however, to one skilled in the art that the present invention may be practiced in many other ways than those specifically set forth herein, and that these variations may be performed in many different ways without departing from the spirit and scope of the present invention.
Claims (6)
1. The feeding pump is characterized by comprising a switch valve and a locking mechanism;
the switch valve comprises a valve shell, a valve core, a liquid inlet joint and a liquid outlet joint; the liquid inlet connector and the liquid outlet connector are arranged on the valve shell, and the liquid inlet connector is connected with an infusion conduit from a liquid feeding wheel of the feeding pump; the valve shell is provided with a valve cavity, the valve core is rotatably arranged in the valve cavity, and the valve core is provided with a liquid passage; when the switch valve is in a conducting state, the liquid inlet joint of the valve shell is communicated with the liquid outlet joint of the valve shell through the liquid channel of the valve core; when the switch valve is in an off state, the liquid channel of the valve core is disconnected with the liquid inlet joint of the valve shell;
the locking mechanism is used for locking the switching valve on the shell of the feeding pump when the switching valve is in a conducting state and unlocking the switching valve when the switching valve is in an off state so as to enable the switching valve to be taken down from the shell of the feeding pump;
the locking mechanism comprises a limiting rotor and a stop cover; the limiting rotor is connected with one end of the valve core and can rotate together with the valve core; the stopping cover is fixed on the shell of the feeding pump and is provided with a central through hole; the limiting rotor is provided with a limiting position and an unlocking position; when the limiting rotor rotates to the limiting position, the switch valve is in a conducting state, the limiting rotor is stopped by the stop cover, when the limiting rotor rotates to the unlocking position, the switch valve is in a closing state, and the limiting rotor can penetrate through a central through hole of the stop cover;
the limiting rotor comprises a rotor body and at least one interference arm extending outwards from the peripheral wall of the rotor body in the radial direction; the rotor body is connected with one end of the valve core; the stop cover comprises a base and a limit wall, and one end of the limit wall is connected with the surface of one side of the base, which is far away from the limit rotor; the central through hole of the stop cover is arranged on the base; when the limiting rotor is at the limiting position, the interference arm interferes with the base; the limiting wall surrounds the valve casing, a first notch for the liquid inlet connector to penetrate through and a second notch for the liquid outlet connector to penetrate through are formed in the limiting wall, a supporting part for supporting the valve casing is arranged on the inner wall of the limiting wall, and the valve casing is supported on the supporting part.
2. A feeding pump anti-free flow device as claimed in claim 1, wherein the feeding pump anti-free flow device includes a drive mechanism for driving the caging rotor to rotate.
3. A feeding pump anti-free flow device according to claim 2, wherein the drive mechanism comprises a controller, a wheel drive motor and a motor drive circuit; the controller, the rotating wheel driving motor and the motor driving circuit are arranged in the shell of the feeding pump, and the rotating wheel is arranged outside the shell of the feeding pump;
the output end of the controller is electrically connected with the input end of the motor driving circuit, the output end of the motor driving circuit is electrically connected with the rotating wheel driving motor, and the output end of the rotating wheel driving motor is connected with the rotating wheel and used for driving the rotating wheel to rotate; the rotating wheel is connected with the limiting rotor and can drive the limiting rotor to rotate together.
4. A feeding pump free flow prevention device as claimed in claim 3, wherein the limiting rotor is provided with a positioning hole for receiving the runner, and the runner is inserted into the positioning hole and is in key connection with the positioning hole.
5. A feeding pump free flow prevention device as claimed in claim 1 wherein the inlet connection and the outlet connection extend in a vertical direction, and the central axis of the inlet connection is aligned with the central axis of the outlet connection, and the inlet connection is located below the outlet connection.
6. A feed pump free flow prevention device as claimed in claim 1 wherein outwardly extending support arms are provided on either side of the outer wall of the valve housing; the supporting part is a pair of steps;
the supporting arms on both sides of the outer wall of the valve housing are supported on the pair of steps, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610089518.6A CN105597186B (en) | 2016-02-17 | 2016-02-17 | Free flow prevention device for feeding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610089518.6A CN105597186B (en) | 2016-02-17 | 2016-02-17 | Free flow prevention device for feeding pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105597186A CN105597186A (en) | 2016-05-25 |
| CN105597186B true CN105597186B (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610089518.6A Active CN105597186B (en) | 2016-02-17 | 2016-02-17 | Free flow prevention device for feeding pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105597186B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110898289A (en) * | 2019-12-27 | 2020-03-24 | 南微医学科技股份有限公司 | Pressure pump and pressure pump control system |
| CN113101451B (en) * | 2021-04-06 | 2022-07-19 | 河南科技大学第一附属医院 | A medicinal liquid injector and an enteral nutrition pump with the injector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5584671A (en) * | 1994-11-28 | 1996-12-17 | Sherwood Medical Company | Apparatus for delivering fluid to a patient |
| US6419670B1 (en) * | 2000-02-16 | 2002-07-16 | W. Cary Dikeman | Gastrostomy tube set |
| US6494864B1 (en) * | 2000-08-29 | 2002-12-17 | Sherwood Services, Ag | Inner lumen anti-free flow device |
| CN1438901A (en) * | 2000-05-04 | 2003-08-27 | 舍伍德服务公开股份有限公司 | Drip chamber for anti free flow device |
| JP2008212314A (en) * | 2007-03-02 | 2008-09-18 | Covidien Ag | Enteral feeding pump and feeding set of enteral feeding pump |
| CN101822869A (en) * | 2009-02-19 | 2010-09-08 | 泰科保健集团有限合伙公司 | The hand control valve actuating device that is used for the medical fluid delivery device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3115330A1 (en) * | 2013-06-28 | 2014-12-31 | Liqui-Box Corporation | Slider valve assembly for aseptic packaging |
-
2016
- 2016-02-17 CN CN201610089518.6A patent/CN105597186B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5584671A (en) * | 1994-11-28 | 1996-12-17 | Sherwood Medical Company | Apparatus for delivering fluid to a patient |
| US6419670B1 (en) * | 2000-02-16 | 2002-07-16 | W. Cary Dikeman | Gastrostomy tube set |
| CN1438901A (en) * | 2000-05-04 | 2003-08-27 | 舍伍德服务公开股份有限公司 | Drip chamber for anti free flow device |
| US6494864B1 (en) * | 2000-08-29 | 2002-12-17 | Sherwood Services, Ag | Inner lumen anti-free flow device |
| JP2008212314A (en) * | 2007-03-02 | 2008-09-18 | Covidien Ag | Enteral feeding pump and feeding set of enteral feeding pump |
| CN101822869A (en) * | 2009-02-19 | 2010-09-08 | 泰科保健集团有限合伙公司 | The hand control valve actuating device that is used for the medical fluid delivery device |
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| Publication number | Publication date |
|---|---|
| CN105597186A (en) | 2016-05-25 |
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