CN109821100B - Step-by-step booster-type pneumatic infusion device - Google Patents
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- CN109821100B CN109821100B CN201910191214.4A CN201910191214A CN109821100B CN 109821100 B CN109821100 B CN 109821100B CN 201910191214 A CN201910191214 A CN 201910191214A CN 109821100 B CN109821100 B CN 109821100B
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Abstract
The invention relates to a step-by-step booster-type pneumatic infusion device, belonging to the field of medical instruments. The box body is provided with a buffer cavity and an upper and a lower access holes, the upper and the lower sides of the box body are provided with an outlet cavity and at least two body cavities with the diameters decreasing from the access hole to the outlet hole in sequence, and the body cavities are provided with an inlet cavity and an outlet hole; the inlet and outlet cavities and the valve plates in the inlet and outlet cavities form inlet and outlet valves respectively; the upper cover and the bottom plate are arranged on the upper side and the lower side of the box body, and the piezoelectric drivers are pressed in all the body cavities through the sealing rings to form compression cavities; the upper inlet hole, each compression cavity and the outlet cavity at the top of the box body are connected in series to form an upper compression unit, the lower inlet hole, each compression cavity, each outlet cavity and the lower outlet hole at the bottom of the box body are connected in series to form a lower compression unit, and the upper compression unit and the lower compression unit are connected in series through the buffer cavities; in operation, the deformation directions of two left and right adjacent drivers in the upper and lower compression units are opposite; the bag cavity of the upper cover is internally provided with a transfusion bag with an air cavity and a medicine cavity, the transfusion tube of the medicine cavity is provided with a needle head and a flow valve, and the air cavity is connected with the upper outlet hole through a pipeline and a switch valve.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a step-by-step booster-type pneumatic infusion device.
Background
The injection administration mainly comprises intravenous injection, intramuscular injection, subcutaneous injection and the like. Intravenous injection is also called infusion administration, and most of the existing infusion devices are composed of an infusion bottle, an infusion tube and an infusion support, wherein the infusion bottle is hung on the infusion support, flows by the self weight of liquid medicine and is injected into a blood vessel of a person through the infusion tube. This infusion mode brings about many problems in practical use: the flow is adjusted by a manual method, and the flow control precision is insufficient; the patient needs to lift the infusion bottle by others when walking or going to the toilet, and the like, so that the movement is inconvenient and the blood can flow back when the height of the infusion bottle is not enough; the patient or the nursing staff is required to watch for a long time, and if the completion of the infusion is not found in time, accidents can be caused; the liquid medicine contacts with air, and the pollution possibility exists when the ambient air is unclean. In addition to the above direct problems, the infusion time is sometimes shortened by reducing the amount of solution, increasing the infusion speed, and the like, which not only burdens the heart, but also affects the therapeutic effect: the most important disadvantage of intramuscular injection and subcutaneous injection, which inject drugs into muscle or subcutaneous tissue in a relatively short time, is that the difference of blood drug concentration is large in one injection period, which is not favorable for effective absorption and utilization of drugs because: most drugs have a better concentration range in human body, and have toxic and side effects when the concentration of the drugs is too high, and have no treatment effect when the concentration of the drugs is too low. Therefore, a miniature portable controlled drug delivery device or system that can prolong the drug injection time and maintain reasonable drug concentration is urgently needed in the medical field.
Disclosure of Invention
The invention provides a step-by-step booster-type pneumatic transfusion device, which has the following implementation scheme: the middle part of the box body is provided with a buffer cavity, the top part of the box body is provided with an upper access hole, the bottom part of the box body is provided with a lower access hole, and the upper side and the lower side of the box body are both provided with an outlet cavity and at least two body cavities; the diameters of body cavities from an upper inlet hole to an upper outlet hole and from a lower inlet hole to a lower outlet hole are sequentially reduced, and an inlet cavity and an outlet hole are arranged on the body cavities; at the top of the box body, an inlet cavity of the cavity with the largest diameter is communicated with the buffer cavity through an upper inlet hole, and an outlet cavity of the cavity with the smallest diameter is communicated with an upper outlet hole b2 through an outlet cavity; the inlet cavity of the cavity with the largest diameter is communicated with the lower inlet hole, and the outlet hole of the cavity with the smallest diameter is communicated with the buffer cavity through the outlet cavity and the lower outlet hole; the inlet cavities of the other left and right adjacent body cavities are communicated with the air outlet; the inlet and outlet cavities and the valve plates arranged in the inlet and outlet cavities respectively form an inlet and outlet valve, and the valve plates are cantilever beam valves or disc-shaped structures; the upper cover and the bottom plate are arranged on the upper side and the lower side of the box body through screws and press-joint the sealing rings in the outlet cavity, the upper cover and the bottom plate press-joint the drivers in all the cavities through the sealing rings to form compression cavities, the sealing rings are arranged on the upper side and the lower side of the drivers, the drivers are piezoelectric drivers, the drivers are formed by bonding a substrate and piezoelectric sheets, and the surfaces of the drivers are coated with insulating paint or bonded with insulating films; the upper inlet hole, each compression cavity, the outlet cavity and the upper outlet hole at the top of the box body are connected in series to form an upper compression unit, the lower inlet hole, each compression cavity, the outlet cavity and the lower outlet hole at the bottom of the box body are connected in series to form a lower compression unit, and the upper compression unit and the lower compression unit are connected in series through the buffer cavity; in operation, the deformation directions of two left and right adjacent drivers in the upper and lower compression units are opposite; the bag cavity of the upper cover is internally provided with a transfusion bag with an air cavity and a medicine cavity, the transfusion tube of the medicine cavity is provided with a needle head and a flow valve, and the air cavity is connected with the upper outlet hole through a pipeline and a switch valve; the upper and lower compression units close the switch valve before supplying air to the air cavity, and open the air cavity after the air pressure in the buffer cavity reaches a set value.
Taking an infusion device with three drivers as an example, from an upper inlet hole to a lower inlet hole to an outlet cavity, the inlet valves are sequentially defined as an inlet valve I, an inlet valve II and an inlet valve III, the drivers are sequentially defined as an actuator I, an actuator II and an actuator III, and the compression cavities are sequentially defined as a compression cavity I, an actuator II and an actuator III; the specific working process of the lower compression unit II is as follows: in the first half cycle, the first and third drivers bend downwards and bend upwards, the first and third inlet valves are opened, the second inlet valve and the outlet valve are closed, the first and third compression chambers suck gas, and the second compression chamber discharges gas, which is a suction process; in the lower half period, the first and third drivers bend upwards, the second driver bends downwards, the first and third inlet valves are closed, the second inlet valve and the second outlet valve are opened, the first and third compression cavities discharge gas, and the second compression cavity sucks gas, which is a discharge process; gas in the compression unit is subjected to the progressive compression of the first compression cavity, the second compression cavity and the third compression cavity and then enters the buffer cavity through the lower outlet hole; similarly, the upper compression unit sucks gas from the buffer cavity, the gas is compressed step by the first compression cavity, the second compression cavity and the third compression cavity and then enters the gas cavity through the switch valve and the gas pipe, so that the medicine cavity is extruded to output medicine liquid, and the output speed of the medicine liquid is regulated by the driving voltage of the driver or the flow valve on the infusion pipe.
In the present invention, the maximum gas pressure of the output of the upper and lower compression units is Pmax＝P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-1}, wherein: p0The lower compression unit is at standard atmospheric pressure, and the upper compression unit is at gas pressure in the buffer chamber, etapFor correcting the coefficient, alpha is more than 0 and is a compression ratio, namely the ratio of the volume variation of a compression cavity caused by the deformation of a driver to the volume of the compression cavity, beta is more than 1 and is the radius ratio of two left and right adjacent compression cavities, and n is more than or equal to 2 and is the number of the compression cavities of the upper compression unit or the lower compression unit; in order to obtain the maximum compression ratio, the height of the compression cavity is equal to the deformation of the center point of the actuator, and the height of the compression cavity is equal to that of the actuator when the actuator is formed by bonding a PZT4 wafer with equal thickness and a brass substrate
ηh、U0Respectively dynamic correction factor and drive voltage, d31Is the piezoelectric constant, hpIs the thickness of the piezoelectric sheet, riThe radius of the compression cavity, namely the radius of the inner circle of the sealing ring in the compression cavity.
Advantages and features: the gas pressure can be greatly improved by utilizing an accumulative compression method; the gas is used for driving the liquid medicine, so that the transfusion speed is easy to be accurately controlled through the driving voltage, a hanging device is not needed, and the liquid medicine is convenient to move and carry; the liquid medicine does not contact with the air, the phenomena of liquid medicine pollution, gas entering blood vessels, blood backflow and the like can not occur, real-time watching is not needed, and the device is safe and reliable.
Drawings
FIG. 1 is a schematic cross-sectional view of an infusion set in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic structural view of an upper cover according to a preferred embodiment of the present invention;
FIG. 3 is a schematic structural view of a case according to a preferred embodiment of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic diagram of the structure of the driver according to a preferred embodiment of the present invention;
fig. 6 is a schematic view of the infusion set in operation in accordance with a preferred embodiment of the present invention.
Detailed Description
The middle part of the box body b is provided with a buffer cavity b7, the top part of the box body b is provided with an upper inlet hole b3 and an upper outlet hole b2, the bottom part of the box body b is provided with a lower inlet hole b3 'and a lower outlet hole b 2', and the upper side and the lower side of the box body b are both provided with an outlet cavity b6 and at least two body cavities b1 i; the diameters of the body cavity b1i from the upper inlet hole b3 to the upper outlet hole b2 and the lower inlet hole b3 'to the lower outlet hole b 2' are sequentially reduced, and an inlet cavity b4 and an outlet hole b5 are arranged on the top wall or the bottom wall of the body cavity b1 i; at the top of the box body b, an inlet cavity b4 of a cavity b1i with the largest diameter is communicated with a buffer cavity b7 through an upper inlet hole b3, and an outlet hole b5 of the cavity b1i with the smallest diameter is communicated with an upper outlet hole b2 through an outlet cavity b 6; at the bottom of the box body b, an inlet cavity b4 of a maximum-diameter body cavity b1i is communicated with a lower inlet hole b3 ', and an outlet hole b5 of a minimum-diameter body cavity b1i is communicated with a buffer cavity b7 through an outlet cavity b6 and a lower outlet hole b 2'; the inlet cavity b4 and the outlet hole b5 of the other left and right adjacent body cavities b1i are communicated; the inlet cavity b4 and the outlet cavity b6 and a valve plate e arranged in the inlet cavity b4 and the outlet cavity b6 form an inlet valve vi and an outlet valve v respectively, and the valve plate e is a cantilever beam valve or a disc-shaped structure; the upper cover a and the bottom plate c are arranged on the upper side and the lower side of the box body b through screws, the sealing rings are pressed in the outlet cavity b6, the upper cover a and the bottom plate c press the driver di in each body cavity b1i through the sealing rings to form a compression cavity Ci, the sealing rings are arranged on the upper side and the lower side of the driver di, the driver di is a piezoelectric driver, the driver di is formed by bonding a substrate di1 and a piezoelectric sheet di2, and the surface of the driver di is coated with insulating paint or bonded with an insulating film; an upper inlet hole b3, each compression cavity Ci, an outlet cavity b6 and an upper outlet hole b2 at the top of the box body b are connected in series to form an upper compression unit I, a lower inlet hole b3 ', each compression cavity Ci, an outlet cavity b6 and a lower outlet hole b 2' at the bottom of the box body b are connected in series to form a lower compression unit II, and the upper compression unit I and the lower compression unit II are connected in series through a buffer cavity b 7; in operation, the deformation directions of the drivers di in two left and right adjacent compression cavities Ci in the upper compression unit I or the lower compression unit II are opposite; an infusion bag y with an air cavity y1 and a medicine cavity y2 is arranged in a bag cavity a2 of the upper cover a, a needle head and a flow valve m are arranged on an infusion tube q of the medicine cavity y2, and the air cavity y1 is connected with an upper outlet hole b2 through a pipeline and a switch valve j; the upper and lower compression units I and II close the switch valve j before supplying air to the air chamber y1, and open the switch valve j after the air pressure in the buffer chamber b7 reaches a set value.
In the present invention, i in the inlet valve vi, the driver di and the compression chamber Ci represents the number from the upper inlet hole b3 or the lower inlet hole b 3' to the outlet chamber b6, i is 1, 2, 3; taking an infusion device with three drivers di as an example, the inlet valve vi is sequentially defined as inlet valves-v 1, two v2 and three v3, the drivers di are sequentially defined as drivers-i 1, two d2 and three d3, and the compression chamber Ci is sequentially defined as compression chambers-i 1, two C2 and three C3; the specific working process of the lower compression unit II is as follows: in the first half cycle, the first drivers d1 and three d3 bend downwards, the second drivers d2 bend upwards, the first inlet valves v1 and three v3 are opened, the second inlet valves v2 and the outlet valves v are closed, the first compression chambers C1 and three C3 suck gas, and the second compression chambers C2 discharge gas, which is the suction process; in the next half period, the first driver d1 and the third driver d3 bend upwards, the second driver d2 bends downwards, the first inlet valve v1 and the third inlet valve v3 are closed, the second inlet valve v2 and the outlet valve v are opened, the first compression chamber C1 and the third compression chamber C3 discharge gas, and the second compression chamber C2 sucks gas, which is a discharge process; gas in the compression unit II is subjected to progressive compression of a first compression cavity C1, a second compression cavity C2 and a third compression cavity C3 and then enters a buffer cavity b7 through a lower outlet hole b 2'; similarly, the upper compression unit I sucks gas from the buffer cavity b7, the gas is compressed step by the compression cavities I C1, II C2 and III C3 and then enters the gas cavity y1 through the switch valve j and the gas pipe, so that the medicine cavity y2 is extruded to output medicine liquid, and the output speed of the medicine liquid is regulated by the driving voltage of the driver di or the flow valve m on the liquid pipe q.
In the present invention, the maximum gas pressure at the output of the upper and lower compression units I and II is Pmax＝P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-1}, wherein: p0The lower compression unit I is at standard atmospheric pressure, and the upper compression unit II is at gas pressure, eta, in the buffer chamber b7pFor correcting the coefficient, alpha is more than 0 and is a compression ratio, namely the ratio of the volume change quantity of the compression cavity Ci caused by the deformation of the driver di to the volume of the compression cavity Ci, beta is more than 1 and is the radius ratio of the two left and right adjacent compression cavities Ci, and n is more than or equal to 2 and is the number of the compression cavities Ci of the upper or lower compression unit; in order to obtain the maximum compression ratio, the height of the compression cavity Ci is equal to the deformation of the center point of the actuator di, and the height of the compression cavity Ci is equal to that of the actuator di formed by bonding a PZT4 wafer with equal thickness and a brass substrate
ηh、U0Respectively dynamic correction factor and drive voltage, d31Is the piezoelectric constant, hpThickness of the piezoelectric sheet di2, riThe radius of the compression cavity Ci, namely the radius of the inner circle of the sealing ring in the compression cavity Ci.
Claims (1)
1. The utility model provides a step-by-step booster-type pneumatic infusion set which characterized in that: the middle part of the box body is provided with a buffer cavity, the top part of the box body is provided with an upper access hole, the bottom part of the box body is provided with a lower access hole, and the upper side and the lower side of the box body are both provided with an outlet cavity and at least two body cavities; the diameters of the body cavities from the upper inlet hole to the upper outlet hole and from the lower inlet hole to the lower outlet hole are reduced in sequence, and an inlet cavity and an outlet hole are arranged on the body cavity(ii) a The inlet cavity of the cavity with the largest diameter is communicated with the buffer cavity through the upper inlet hole, and the outlet cavity of the cavity with the smallest diameter is communicated with the upper outlet hole through the outlet cavity at the top of the box body; the inlet cavity of the cavity with the largest diameter is communicated with the lower inlet hole, and the outlet hole of the cavity with the smallest diameter is communicated with the buffer cavity through the outlet cavity and the lower outlet hole; the inlet cavities of the other left and right adjacent body cavities are communicated with the air outlet; the inlet and outlet cavities and the valve plates arranged in the inlet and outlet cavities respectively form an inlet and outlet valve; the upper cover and the bottom plate are arranged on the upper side and the lower side of the box body, the sealing rings are pressed in the oral cavity, and the piezoelectric drivers are pressed in all the body cavities through the sealing rings to form compression cavities; the upper inlet hole, each compression cavity, the outlet cavity and the upper outlet hole at the top of the box body are connected in series to form an upper compression unit, the lower inlet hole, each compression cavity, the outlet cavity and the lower outlet hole at the bottom of the box body are connected in series to form a lower compression unit, and the upper compression unit and the lower compression unit are connected in series through the buffer cavity; the maximum gas pressure of the output of the upper and lower compression units is Pmax＝P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-1}, wherein: p0The lower compression unit is at standard atmospheric pressure, and the upper compression unit is at gas pressure in the buffer chamber, etapFor correcting the coefficient, alpha is a compression ratio, beta is the radius ratio of two left and right adjacent compression cavities, and n is the number of the compression cavities of the upper or lower compression unit; in operation, the deformation directions of two left and right adjacent drivers in the upper and lower compression units are opposite; the bag cavity of the upper cover is internally provided with a transfusion bag with an air cavity and a medicine cavity, the transfusion tube of the medicine cavity is provided with a needle head and a flow valve, and the air cavity is connected with the upper outlet hole through a pipeline and a switch valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191214.4A CN109821100B (en) | 2019-03-01 | 2019-03-01 | Step-by-step booster-type pneumatic infusion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910191214.4A CN109821100B (en) | 2019-03-01 | 2019-03-01 | Step-by-step booster-type pneumatic infusion device |
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| CN109821100A CN109821100A (en) | 2019-05-31 |
| CN109821100B true CN109821100B (en) | 2021-04-30 |
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| CN201910191214.4A Active CN109821100B (en) | 2019-03-01 | 2019-03-01 | Step-by-step booster-type pneumatic infusion device |
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| CN110665089B (en) * | 2019-09-20 | 2021-10-19 | 浙江师范大学 | Electrostatic peristaltic pump for blood conveying |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304324A (en) * | 1998-01-16 | 2001-07-18 | 坦德姆医疗公司 | Medication delivery apparatus |
| CN203564606U (en) * | 2013-12-03 | 2014-04-30 | 吉林大学 | Portable piezoelectric driving insulin pump |
| CN104936638A (en) * | 2012-11-30 | 2015-09-23 | 欧文蒙福德有限公司 | Display arrangements |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344743A (en) * | 1979-12-04 | 1982-08-17 | Bessman Samuel P | Piezoelectric driven diaphragm micro-pump |
| CN2673410Y (en) * | 2004-02-14 | 2005-01-26 | 王新明 | External wound serious patient fast pressurized transfusion device |
| CN100392245C (en) * | 2006-01-27 | 2008-06-04 | 吉林大学 | Integrated precise medicine transportation pump |
| EP2359886A1 (en) * | 2010-02-12 | 2011-08-24 | Debiotech S.A. | Micromechanic passive flow regulator |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
| CN102979707B (en) * | 2012-12-06 | 2015-07-08 | 浙江师范大学 | Self-measurement piezoelectric stack pump |
| KR101688220B1 (en) * | 2015-02-26 | 2016-12-20 | 연세대학교 원주산학협력단 | Syringe adaptor |
| CN108175904A (en) * | 2018-01-31 | 2018-06-19 | 王桂娟 | A kind of intelligent transfusion ancillary equipment and control system |
-
2019
- 2019-03-01 CN CN201910191214.4A patent/CN109821100B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304324A (en) * | 1998-01-16 | 2001-07-18 | 坦德姆医疗公司 | Medication delivery apparatus |
| CN104936638A (en) * | 2012-11-30 | 2015-09-23 | 欧文蒙福德有限公司 | Display arrangements |
| CN203564606U (en) * | 2013-12-03 | 2014-04-30 | 吉林大学 | Portable piezoelectric driving insulin pump |
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