CN110141724A - A kind of drop slowdown monitoring device of infusion apparatus drop pot - Google Patents
A kind of drop slowdown monitoring device of infusion apparatus drop pot Download PDFInfo
- Publication number
- CN110141724A CN110141724A CN201910483452.2A CN201910483452A CN110141724A CN 110141724 A CN110141724 A CN 110141724A CN 201910483452 A CN201910483452 A CN 201910483452A CN 110141724 A CN110141724 A CN 110141724A
- Authority
- CN
- China
- Prior art keywords
- infusion apparatus
- drop
- eyeglass
- pot
- drop pot
- 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.)
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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
- A61M5/168—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
- A61M5/16886—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 for measuring fluid flow rate, i.e. flowmeters
- A61M5/1689—Drip counters
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
- A61M2205/3334—Measuring or controlling the flow rate
Landscapes
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a kind of drop slowdown monitoring devices of infusion apparatus drop pot, comprising: is arranged with the infusion apparatus bracket of infusion apparatus drop pot；The transmitter for being arranged on the infusion apparatus bracket and being located in the drop pot circumferential direction；It is arranged on the infusion apparatus bracket for reflecting one first eyeglass of the transmitting light of the transmitter；On the infusion apparatus bracket and one second eyeglass that is opposite with first eyeglass and setting the reflection light for reflecting first eyeglass；It is arranged on the infusion apparatus bracket and is located in the drop pot circumferential direction for receiving the receiver of the reflection light of second eyeglass；Wherein, the joint of the reflection light of the transmitting light and second eyeglass of the transmitter is located on the dropping liquid track of the drop pot.The drop slowdown monitoring device of infusion apparatus drop pot has the advantages that monitoring is accurate, number of infusion drops can be accurately recorded, to measure the drip velocity of infusion.
Description
Technical field
The present invention relates to the field of medical instrument technology more particularly to the drop slowdown monitoring devices of infusion apparatus drop pot.
Background technique
Infusion is one of the basic skills of Current therapeutic disease.Hospital carries out infusion treatment process to patient using infusion apparatus
In, it needs to select suitable intravenous drip speed according to drug and conditions of patients.Currently, in various big hospital ward, to patient
The nurse work of infusion situation is the essential ring of nurse's routine work.Under normal circumstances, defeated used in patient in order to know
Liquid bottle there remains how many, to guarantee replacement infusion bottle in time, it is often necessary to and nurses check once at regular intervals, alternatively,
Family members are arranged to nurse on side, it is more troublesome.Therefore, it is necessary to study a kind of drop slowdown monitoring devices of infusion apparatus drop pot.
Summary of the invention
Shortcoming present in view of the above technology, the present invention provides one kind can accurately measure the defeated of drip velocity
The drop slowdown monitoring device of liquid device drop pot.
The technical solution adopted by the present invention to solve the technical problems is: a kind of drop slowdown monitoring device of infusion apparatus drop pot,
It include: the infusion apparatus bracket for being arranged with infusion apparatus drop pot；It is arranged on the infusion apparatus bracket and is located at the drop pot circumferential direction side
Upward transmitter；It is arranged on the infusion apparatus bracket for reflecting one first eyeglass of the transmitting light of the transmitter；
It is on the infusion apparatus bracket and opposite with first eyeglass and set reflection light for reflecting first eyeglass
One second eyeglass；It is arranged on the infusion apparatus bracket and is located in the drop pot circumferential direction for receiving second eyeglass
Reflection light receiver；Wherein, the joint of the reflection light of the transmitting light and second eyeglass of the transmitter
On the dropping liquid track of the drop pot, the dropping liquid track is a vertical straight line being distributed along the short transverse of the drop pot.
Preferably, the first accommodating cavity for accommodating the drop pot is formed on the infusion apparatus bracket, described first holds
The first opening for offering and being placed in first accommodating cavity convenient for the drop pot in the cavity wall of chamber is set, first opening
A pair of opposite side wall tightens intrinsic first eyeglass and second eyeglass.
Preferably, first mounting base for being used to install launching tube is provided on the lateral wall of the infusion apparatus bracket,
In, the transmitter is plugged in the barrel chamber of the launching tube.
Preferably, first mounting base include the first pedestal being molded on the infusion apparatus stent outer wall, it is removable
Unload the first lid being arranged on first pedestal for being fastened on the launching tube on first pedestal.
Preferably, the launching tube and the first mounting base contact portion are in spherosome, the front end of the spherosome
One and the integrally formed cylindrical body of the spherosome are formed, the barrel chamber of the launching tube runs through the spherosome and the cylinder
Body and be in a stepped throughhole, one is offered on the lateral wall of the infusion apparatus bracket for accommodating the front end circle of the launching tube
Cylinder and the first mounting hole that the barrel chamber of the launching tube is connected to first accommodating cavity.
Preferably, second mounting base for being used to install receiver is provided on the lateral wall of the infusion apparatus bracket,
In, second mounting base include one be molded on the infusion apparatus stent outer wall the second pedestal, one be detachably arranged at
The second lid on second pedestal is provided with one on second pedestal for accommodating the pedestal chamber of the receiver, institute
It states and offers second mounting hole that the pedestal chamber is connected to first accommodating cavity on the lateral wall of infusion apparatus bracket.
Preferably, one is formed on the chamber top of first accommodating cavity to wear for the interconnecting piece for dripping pot and upper infusion tube
If circular hole, wherein formed on the bottom face on the first accommodating cavity chamber top and match and can fit at the top of the drop pot
Ladder-like arc groove for different type drop pot.
Preferably, the incident ray on first eyeglass and the angle between reflection light are the first eyeglass angle, institute
Stating the angle between incident ray and reflection light on the second eyeglass is the second eyeglass angle, wherein the first eyeglass folder
Angle is equal in magnitude with the second eyeglass angle, and the value range of the first eyeglass angle and the second eyeglass angle
Are as follows: 15 °~60 °.
Preferably, the size of the first eyeglass angle is 35 °, and the size of the second eyeglass angle is 35 °.
Preferably, one is also formed on the infusion apparatus bracket to be located at immediately below first accommodating cavity and with described first
Second accommodating cavity of accommodating cavity connection is provided with one in second accommodating cavity for the drop pot to be pushed against first appearance
Set intracavitary sliding module unit.
Compared with prior art, the present invention the beneficial effect is that: the drop slowdown monitoring device of infusion apparatus drop pot provided by the invention,
The transmitting light of transmitter passes through two secondary reflections of the first eyeglass and the second eyeglass, is finally received by receiver, drips each of pot
The reflection light of transmitting light and/or second eyeglass of the drop Jing Guo transmitter can be monitored to, and can accurately be recorded defeated
Number of drops can timely and accurately react the drip velocity in timely or a period of time.
Detailed description of the invention
Fig. 1 is one of the structural schematic diagram of the drop slowdown monitoring device of infusion apparatus drop pot of the present invention；
Fig. 2 is the second structural representation of the drop slowdown monitoring device of infusion apparatus drop pot of the present invention；
Fig. 3 is the schematic diagram of the section structure of the overlook direction of the drop slowdown monitoring device of infusion apparatus drop pot of the present invention；
Fig. 4 is the enlarged structure schematic diagram of a-quadrant in Fig. 3；
Fig. 5 is the decomposition texture schematic diagram of the drop slowdown monitoring device of infusion apparatus drop pot of the present invention；
Fig. 6 is one of the structural schematic diagram of infusion apparatus bracket of the invention；
Fig. 7 is the second structural representation of infusion apparatus bracket of the invention；
Fig. 8 is the third structural representation of infusion apparatus bracket of the invention；
Fig. 9 is the four of the structural schematic diagram of infusion apparatus bracket of the invention.
In figure: 11, dripping pot；13, upper infusion tube；14, interconnecting piece；30, infusion apparatus bracket；31, the first accommodating cavity；311,
Circular hole；312, arc groove；32, the second accommodating cavity；33, the first eyeglass；34, the second eyeglass；35, the first mounting hole；36, second
Mounting hole；40, transmitter；41, the first mounting base；411, the first pedestal；412, the first lid；42, launching tube；50, receiver；
51, the second mounting base；511, the second pedestal；512, the second lid；60, module unit is slided；61, guide rod；611, card slot；62, sliding
Motion block；621, support slot；63, spring.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figures 1 to 9, the present invention provides a kind of drop slowdown monitoring devices of infusion apparatus drop pot, comprising: is arranged with defeated
The infusion apparatus bracket 30 of liquid device drop pot 11；It is arranged on the infusion apparatus bracket 30 and is located in 11 circumferential direction of drop pot
Transmitter 40；It is arranged on the infusion apparatus bracket 30 for reflecting one first eyeglass of the transmitting light of the transmitter 40
33；It is set in opposite directions for reflecting the anti-of first eyeglass 33 on the infusion apparatus bracket 30 and with first eyeglass 33
Penetrate one second eyeglass 34 of light；It is arranged on the infusion apparatus bracket 30 and is located in 11 circumferential direction of drop pot for connecing
Receive the receiver 50 of the reflection light of second eyeglass 34；Wherein, as shown in figure 3, the transmitting light of the transmitter 40 and
The joint of the reflection light of second eyeglass 34 is located on the dropping liquid track of the drop pot 11, and the dropping liquid track is an edge
The vertical straight line of the short transverse distribution of the drop pot 11.
As an embodiment of this programme, as shown in Figures 1 to 5, the transmitter 40 is laser emitter, the transmitting
The high settings such as device 40 and the receiver 50, the dropping liquid track of the drop pot 11 are the central axis of the drop pot 11.
As an embodiment of this programme, as shown in Figures 6 to 9, form on the infusion apparatus bracket 30 for accommodating
First accommodating cavity 31 of the drop pot 11, offers in the cavity wall of first accommodating cavity 31 and is placed in institute convenient for the drop pot 11
The first opening in the first accommodating cavity 31 is stated, the opposite side wall of a pair of first opening tightens intrinsic first eyeglass, 33 He
Second eyeglass 34.
As an embodiment of this programme, as shown in Figure 3 and Figure 4, it is provided on the lateral wall of the infusion apparatus bracket 30
One for installing the first mounting base 41 of launching tube 42, wherein the transmitter 40 is plugged in the barrel chamber of the launching tube 42.
As an embodiment of this programme, as shown in Figure 3 and Figure 4, first mounting base 41 is described defeated including being molded over
The first pedestal 411 on 30 lateral wall of liquid device bracket is detachably arranged on first pedestal 411 for by the launching tube
42 are fastened on the first lid 412 on first pedestal 411.
As an embodiment of this programme, as shown in Fig. 3, Fig. 4 and Fig. 6, the launching tube 42 and first mounting base
41 contact portions are in spherosome, and the front end of the spherosome forms one and the integrally formed cylindrical body of the spherosome, institute
The barrel chamber for stating launching tube 42 runs through the spherosome and the cylindrical body and is in a stepped throughhole, the infusion apparatus bracket 30
One is offered on lateral wall for accommodating the front end cylindrical body of the launching tube 42 and making barrel chamber and the institute of the launching tube 42
State the first mounting hole 35 of the first accommodating cavity 31 connection；In the present solution, the front end of 42 barrel chamber of launching tube is transmitting cavity,
The aperture value range of the transmitting cavity is 1~20mm, wherein 42 barrel chamber of launching tube is close to the direction of the drop pot 11
For front end.
As an embodiment of this programme, as shown in Fig. 2, Fig. 3 and Fig. 7, set on the lateral wall of the infusion apparatus bracket 30
One is equipped with for installing the second mounting base 51 of receiver 50, wherein second mounting base 51 is molded over described defeated including one
The second pedestal 511, one on 30 lateral wall of liquid device bracket is detachably arranged at the second lid 512 on second pedestal 511,
One is provided on second pedestal 511 for accommodating the pedestal chamber of the receiver 50, the outside of the infusion apparatus bracket 30
Second mounting hole 36 that the pedestal chamber is connected to first accommodating cavity 31 is offered on wall；In the present solution, described
The front end of pedestal chamber is to receive cavity, and the aperture value range for receiving cavity is 1~20mm, wherein the pedestal chamber
Direction close to the drop pot 11 is front end.
As an embodiment of this programme, as shown in Figure 6 to 8, one is formed on the chamber top of first accommodating cavity 31
The circular hole 311 worn for the interconnecting piece 14 of the drop pot 11 and upper infusion tube 13, wherein the 31 chamber top of the first accommodating cavity
Bottom face on form with it is described drop pot 11 top match be applicable to different type drop pot ladder-like arc groove
312。
As an embodiment of this programme, as shown in figure 3, incident ray on first eyeglass 33 and reflection light it
Between angle be the first eyeglass angle, the angle between incident ray and reflection light on second eyeglass 34 is the second mirror
Piece angle, wherein the first eyeglass angle is equal in magnitude with the second eyeglass angle, and the first eyeglass angle with
The value range of the second eyeglass angle are as follows: 15 °~60 °.
As an embodiment of this programme, the size of the first eyeglass angle is 35 °, the second eyeglass angle it is big
Small is 35 °, be will affect if the value of the first eyeglass angle and the second eyeglass angle is excessive or too small described defeated
The structure of liquid device bracket 30 is unfavorable for the installation of the drop pot 11, first eyeglass 33 and second eyeglass 34.
One is also formed on the infusion apparatus bracket 30 as shown in Figure 1, Figure 2 and shown in Fig. 5 as an embodiment of this programme
The second accommodating cavity 32 being connected to immediately below first accommodating cavity 31 and with first accommodating cavity 31, second accommodating
A sliding module unit 60 for being pushed against the drop pot in first accommodating cavity 31 is provided in chamber 32.
As an embodiment of this programme, as shown in figure 5, the rank of first accommodating cavity 31 and second accommodating cavity 32
The place of connecing forms a shaft shoulder limiting section for detent, and the sliding module unit 60 includes that a pair is fastened on second appearance vertically
Set sliding shoe 62 that guide rod 61, one in chamber 32 is located in second accommodating cavity 32 and is set on a pair of guide rod 61,
It is set on the guide rod 61 and is located at for flexibly supporting the spring 63 of the sliding shoe 62 below the sliding shoe 62,
In, one is offered on the sliding shoe 62 is open for being caught in the second of the drop pot 11 and the lower infusion tube 12, it is described
The top of second opening forms a support slot 621 for being used to support drop 11 bottom of pot, and the guide rod 61 is located at the cunning
The opposite two sides of motion block 62 form the guide rod hole worn vertically for the guide rod 61, the spring 63 on the sliding shoe 62
It is arranged in a one-to-one correspondence with the guide rod 61, in the present solution, the sliding shoe 62 is when under the reset state, the sliding shoe 62
Top end face be resisted against on the shaft shoulder limiting section, the shaft shoulder limiting section is used to limit the limes superiors position of the sliding shoe 62
It sets.
As an embodiment of this programme, as shown in figure 5, being provided with use on the top end part and bottom end of the guide rod 61
The guide rod 61 when installation, is first vertically inserted into second accommodating cavity 32 by the card slot 611 of Yu Kashe retainer ring (not shown)
It is interior, wherein the top end part and bottom end of the guide rod 61 extend to the outside of second accommodating cavity 32, then again by retainer ring card
It is located at the installation that the guide rod 61 can be completed on the card slot 611, has the advantages that structure is simple, easy for installation.
Although the embodiments of the present invention have been disclosed as above, but it is not limited in listed fortune in specification and embodiments
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily real
Now other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is not limited to
Specific details and legend shown and described herein.
Claims (10)
1. a kind of drop slowdown monitoring device of infusion apparatus drop pot characterized by comprising
It is arranged with the infusion apparatus bracket (30) of infusion apparatus drop pot (11)；
The transmitter (40) for being arranged on the infusion apparatus bracket (30) and being located in described drop pot (11) circumferential direction；
One first eyeglass of the transmitting light for reflecting the transmitter (40) is set on the infusion apparatus bracket (30)
(33)；
It is set in opposite directions for reflecting first eyeglass on the infusion apparatus bracket (30) and with first eyeglass (33)
(33) one second eyeglass (34) of reflection light；
It is arranged on the infusion apparatus bracket (30) and is located in drop pot (11) circumferential direction for receiving second mirror
The receiver (50) of the reflection light of piece (34)；
Wherein, the joint of the reflection light of the transmitting light and second eyeglass (34) of the transmitter (40) is located at described
On the dropping liquid track for dripping pot (11), the dropping liquid track is a vertical straight line being distributed along the short transverse of drop pot (11).
2. the drop slowdown monitoring device of infusion apparatus drop pot as described in claim 1, which is characterized in that the infusion apparatus bracket (30)
On form the first accommodating cavity (31) for accommodating drop pot (11), offer in the cavity wall of first accommodating cavity (31)
The first opening in first accommodating cavity (31), a pair of of opposite sides of first opening are placed in convenient for drop pot (11)
First eyeglass (33) and second eyeglass (34) are fastened on wall.
3. the drop slowdown monitoring device of infusion apparatus drop pot as claimed in claim 2, which is characterized in that the infusion apparatus bracket (30)
Lateral wall on be provided with one for installing the first mounting base (41) of launching tube (42), wherein the transmitter (40) is planted
In the barrel chamber of the launching tube (42).
4. the drop slowdown monitoring device of infusion apparatus drop pot as claimed in claim 3, which is characterized in that first mounting base (41)
Including be molded on infusion apparatus bracket (30) lateral wall the first pedestal (411), be detachably arranged at first pedestal
(411) the first lid (412) on for being fastened on the launching tube (42) on first pedestal (411).
5. the drop slowdown monitoring device of infusion apparatus drop pot as claimed in claim 4, which is characterized in that the launching tube (42) and institute
The first mounting base (41) contact portion is stated in spherosome, the front end of the spherosome form one with the spherosome one at
The barrel chamber of the cylindrical body of type, the launching tube (42) through the spherosome and the cylindrical body and is in a stepped throughhole, institute
It states and offers one on the lateral wall of infusion apparatus bracket (30) for accommodating the front end cylindrical body of the launching tube (42) and making institute
State the first mounting hole (35) that the barrel chamber of launching tube (42) is connected to first accommodating cavity (31).
6. the drop slowdown monitoring device of infusion apparatus drop pot as claimed in claim 2, which is characterized in that the infusion apparatus bracket (30)
Lateral wall on be provided with one for installing the second mounting base (51) of receiver (50), wherein second mounting base (51)
Including one be molded on infusion apparatus bracket (30) lateral wall the second pedestal (511), one be detachably arranged at described second
The second lid (512) on pedestal (511) is provided with one on second pedestal (511) for accommodating the receiver (50)
Pedestal chamber, offer one on the lateral wall of the infusion apparatus bracket (30) and make the pedestal chamber and first accommodating cavity
(31) the second mounting hole (36) being connected to.
7. the drop slowdown monitoring device of infusion apparatus drop pot as claimed in claim 2, which is characterized in that first accommodating cavity (31)
Chamber top on form one for drop pot (11) and upper infusion tube (13) the circular hole (311) that wears of interconnecting piece (14),
Wherein, it forms on the bottom face on the first accommodating cavity (31) chamber top and is applicable to being matched at the top of the drop pot (11)
The ladder-like arc groove (312) of different type drop pot.
8. the drop slowdown monitoring device of infusion apparatus drop pot as described in claim 1, which is characterized in that on first eyeglass (33)
Incident ray and reflection light between angle be the first eyeglass angle, the incident ray on second eyeglass (34) and anti-
The angle penetrated between light is the second eyeglass angle, wherein the size of the first eyeglass angle and the second eyeglass angle
It is equal, and the value range of the first eyeglass angle and the second eyeglass angle are as follows: 15 °~60 °.
9. the drop slowdown monitoring device of infusion apparatus drop pot as claimed in claim 8, which is characterized in that the first eyeglass angle
Size is 35 °, and the size of the second eyeglass angle is 35 °.
10. the drop slowdown monitoring device of infusion apparatus drop pot as claimed in claim 2, which is characterized in that the infusion apparatus bracket
(30) one is also formed on is located at second be connected to immediately below first accommodating cavity (31) and with first accommodating cavity (31)
Accommodating cavity (32), second accommodating cavity (32) is interior to be provided with one for the drop pot to be pushed against first accommodating cavity (31)
Interior sliding module unit (60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910483452.2A CN110141724A (en) | 2019-06-04 | 2019-06-04 | A kind of drop slowdown monitoring device of infusion apparatus drop pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910483452.2A CN110141724A (en) | 2019-06-04 | 2019-06-04 | A kind of drop slowdown monitoring device of infusion apparatus drop pot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110141724A true CN110141724A (en) | 2019-08-20 |
Family
ID=67590511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910483452.2A Pending CN110141724A (en) | 2019-06-04 | 2019-06-04 | A kind of drop slowdown monitoring device of infusion apparatus drop pot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110141724A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110141723A (en) * | 2019-06-04 | 2019-08-20 | 苏州慧尔生医疗科技有限公司 | A kind of infusion controller |
| CN116159209A (en) * | 2023-03-06 | 2023-05-26 | 江西省人民医院 | Drop measuring algorithm and drop detector structure of medical infusion apparatus |
-
2019
- 2019-06-04 CN CN201910483452.2A patent/CN110141724A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110141723A (en) * | 2019-06-04 | 2019-08-20 | 苏州慧尔生医疗科技有限公司 | A kind of infusion controller |
| CN116159209A (en) * | 2023-03-06 | 2023-05-26 | 江西省人民医院 | Drop measuring algorithm and drop detector structure of medical infusion apparatus |
| CN116159209B (en) * | 2023-03-06 | 2023-10-24 | 江西省人民医院 | Drop measuring algorithm and drop detector structure of medical infusion apparatus |
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