CN2226457Y - Enlarging volume decompression returned blood device - Google Patents
Enlarging volume decompression returned blood device Download PDFInfo
- Publication number
- CN2226457Y CN2226457Y CN95219284U CN95219284U CN2226457Y CN 2226457 Y CN2226457 Y CN 2226457Y CN 95219284 U CN95219284 U CN 95219284U CN 95219284 U CN95219284 U CN 95219284U CN 2226457 Y CN2226457 Y CN 2226457Y
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- cavity
- support
- joint
- capsule
- utility
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- Expired - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
The utility model belongs to an improvement on medical appliances which are matched with a disposable (blood) transfusion device of medical use or a vein puncture needle instrument. The utility model is composed of an upper cover 3, the cavity body 7 of a pressure amplification cavity, a support frame 13, liquid medicine filter membrane 4, and a deformed pocket 8. In the utility model, the deformed pocket 8 uses the structure in which one end of the deformed pocket 8 is provided with an opening, and the other end of the deformed pocket 8 is sealed; the upper opening of the support frame 13 is provided with an inclined plane 15; the cylindrical cavity body is beveled to be turned into a liquid medicine guide cavity 10 which is communicated with an amplification cavity 6 and a liquid discharge hole channel 16. The utility model can effectively eliminate the phenomenon of air-bubble accumulation in transfusion, wherein, the phenomenon of air-bubble accumulation easily occurs in medicine liquid. The utility model has the advantages of convenient operation, obvious display of blood return, function of filtration, and reduced manufacture cost.
Description
This utility model belongs to a kind of and Dispoable medical transfusion (blood) device or the supporting medical apparatus of venipuncture needle set.
Widely used in the world at present Dispoable medical transfusion (blood) device all is to adopt high molecular polymer (as polrvinyl chloride, PVC) to make.Transfusion (blood) device that this class material is made, strain is very little, in carrying out human vein puncture operating process, even penetrate into vein, because it is venous pressure is little, not enough so that the expansion of transfusion (blood) device skirt is difficult to see " blood back ", be difficult to judge whether venipuncture is successful, gives clinical a lot of inconvenience that bring.
I provided a kind of blood back flowing device at application number in for 93101648.7 Chinese invention patent application, provided a kind of volume-expanding pressure-reducing blood return device in the patent No. in for 93245797.5 Chinese utility model patent again after improving.Use discovery through reality, this device exists the deficiency of easily accumulating bubble in the medicinal liquid when transfusion (blood), and the manufacturing cost of whole device is still higher.
This utility model is the improvement that foregoing invention is created.
The purpose of this utility model provides the modified model volume-expanding pressure-reducing blood return device that a kind of cost is lower, be difficult for accumulating in medicinal liquid bubble.
Basic design of the present utility model is: will be out of shape capsule 8 by both ends open, and change an end opening into, an end closed construction; The inboard suitable for reading of support 13 is provided with a tapered plane 15, the upper end of tapered plane 15 is suitable for reading from support 13, the lower end forms a medicinal liquid lead-in cavity 10 of a circular cylindrical cavity being cut sth. askew and forming by tapered plane 15 to the internal orifice in fluid duct 16, and enlarged cavity 6 is communicated with fluid duct 16.
Specified below in conjunction with drawings and Examples.Fig. 1 is this utility model vertical section structure sketch map.In Fig. 1, the modified model volume-expanding pressure-reducing blood return device is made up of loam cake 3, pressure enlarged cavity cavity 7, support 13, liquid medicine filtering membrane 4, distortion capsule 8.The top of loam cake 3 is feed tube joint 2, and the center of joint 2 is feed liquor duct 1.Liquid medicine filtering membrane 4 is fixed on the filter membrane frame 5 between loam cake 3 and the pressure enlarged cavity cavity 7, and the pressure enlarged cavity 6 that loam cake 3 and cavity 7 are formed is divided into two parts up and down.Feed liquor duct 1 directly is communicated with the top of enlarged cavity 6.The bottom of enlarged cavity 6 is by cavity 7 and bonding the forming of support 13 sealings.The port of distortion capsule 8 is sleeved on the column joint 11 of support 13, and adhering and sealing has through hole 12 in the joint 11, will be out of shape capsule 8 inner chambers 9 and be communicated with outside air.Support 13 lower ends are liquid outlet joint 14, and the center of joint 14 is fluid duct 16.The inboard suitable for reading of support 13 is provided with a tapered plane 15, the upper end of tapered plane 15 is suitable for reading from support 13, the lower end forms a medicinal liquid lead-in cavity 10 of a circular cylindrical cavity being cut sth. askew and forming by tapered plane 15 to the internal orifice in fluid duct 16, and enlarged cavity 6 is communicated with fluid duct 16.
Distortion capsule 8 adopts an end opening, an end closed construction.The blind end of distortion capsule 8 can adopt " A " font, and just as the front end of screwdriver, remainder adopts cylindrical, and opening is in cylindrical bottom portion.The effective length of distortion capsule 8 is more preferably greater than 7mm, and cylindrical inner diameter is more preferably greater than 3mm, and wall thickness is that 0.1-0.5mm is better.Distortion capsule 8 adopts the nontoxic elastic material to make.Distortion capsule 8 is adhesively fixed on column joint 11, and the minimum range of the outer wall of distortion capsule 8 and the inwall of pressure enlarged cavity cavity 7 is more preferably greater than 3mm.Column joint 11 can the seat on tapered plane 15.
Pressure enlarged cavity cavity 7, support 13 and loam cake 3 adopt non-toxic transparent plastic to make.The injection moulding that preferably is connected as a single entity of filter membrane frame 5 and pressure enlarged cavity cavity 7, film frame 5 the simplest structures can be crossbeams.The injection moulding that is connected as a single entity of liquid outlet joint 14 and support 13, profile be a taper shape, tapering is 6: 100, so that be connected in series with existing disposable infusion (blood) device.
This utility model work process is as follows, when carrying out venipuncture, transfusion (blood) device control valve is closed, feed liquor duct 1, pressure enlarged cavity 6, medicinal liquid lead-in cavity 10 and fluid duct 16 etc. all have been full of treats loading liquid, be connected in liquid outlet joint 14, after the needle set that is connected with fluid duct 16 thrusts vein, venous pressure is by treating the transmission of loading liquid, act on distortion capsule 8 outer walls, force the air in distortion capsule 8 inner chambers 9 to discharge a part, make the volume of pressure enlarged cavity 6 become big by passage 12, form the blood backflow and enter fluid duct 16, the success of indication Venipuncture.
According to the hydrodynamics law of connected vessels, because the long-pending cross-sectional area that is far longer than fluid duct 16 and passage 12 of distortion capsule 8 outer wall surface is equivalent to the pressure of venous pressure transfer function in distortion capsule 8 is amplified.
The utlity model has following advantage:
1, the medicinal liquid water conservancy diversion is effective, unimpeded when transfusion (blood), is not prone to and accumulates bubble.This is because after distortion capsule 8 is improved to end sealing, and needn't therefrom roll over is that " V " font is inverted and is installed again, thus the bending place of having eliminated easy generation pneumatosis bubble; Note keeping the suitable distance with pressure enlarged cavity cavity 7 when distortion capsule 8 is installed, eliminated the thromboembolism of tension force bubble; With filter membrane frame 5 simplified structures, reduced the condition that bubble generates and accumulates; By the medicinal liquid lead-in cavity 10 that tapered plane 15 constitutes, guide functions is obvious.
2, designs simplification, technology are easy, and manufacturing cost reduces.The improvement of distortion capsule 8 makes it install and fix technology and simplifies relatively; Filter membrane frame 5 designs simplifications; These all help further reducing production costs.
3, easy to use, blood back shows obviously can finish simultaneously the filtration of transfusion.
Claims (8)
1, a kind of volume-expanding pressure-reducing blood return device is made up of loam cake (3), pressure enlarged cavity cavity (7), support (13), liquid medicine filtering membrane (4), distortion capsule (8); The top of loam cake (3) is that the center of feed tube joint (2), joint (2) is feed liquor duct (1); Liquid medicine filtering membrane (4) is fixed on the filter membrane frame (5) between loam cake (3) and the pressure enlarged cavity cavity (7), and the pressure enlarged cavity (6) that loam cake (3) and cavity (7) are formed is divided into two parts up and down; Feed liquor duct (1) directly is communicated with the top of enlarged cavity (6); The bottom of enlarged cavity (6) is by cavity (7) and bonding the forming of support (13) sealing; The port of distortion capsule (8) is sleeved on the column joint (11) of support (13), and adhering and sealing has passage (12) in the joint (11), will be out of shape capsule (8) inner chamber (9) and be communicated with outside air; Support (13) lower end is liquid outlet joint (14), and the center of joint (14) is fluid duct (16); It is characterized in that distortion capsule (8) adopts an end opening, an end closed construction; The inboard suitable for reading of support (13) is provided with a tapered plane (15), the upper end of tapered plane (15) is suitable for reading from support (13), the lower end is to the internal orifice of fluid duct (16), form a medicinal liquid lead-in cavity (10) of a circular cylindrical cavity being cut sth. askew and forming, enlarged cavity (6) is communicated with fluid duct (16) by tapered plane (15).
2, device as claimed in claim 1 is characterized in that, the blind end of distortion capsule (8) adopts " A " shape, and just as the front end of screwdriver, remainder adopts cylindrical, and opening is in cylindrical bottom portion.
3, device as claimed in claim 1 is characterized in that, column joint (11) seat is on tapered plane (15).
4, device as claimed in claim 1 is characterized in that, filter membrane frame (5) is a crossbeam.
5, device as claimed in claim 1 is characterized in that, distortion capsule (8) is adhesively fixed on column joint (11), and the minimum range of the outer wall of distortion capsule (8) and the inwall of pressure enlarged cavity cavity (7) is greater than 3mm.
6, device as claimed in claim 1 is characterized in that, the effective length of distortion capsule (8) is greater than 7mm, and cylindrical inner diameter is greater than 3mm, and wall thickness is 0.1-0.5mm.
7, device as claimed in claim 1 is characterized in that, distortion capsule (8) adopts the nontoxic elastic material to make.
8, device as claimed in claim 1 is characterized in that, pressure enlarged cavity cavity (7), support (13) and loam cake (3) adopt non-toxic transparent plastic to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95219284U CN2226457Y (en) | 1995-08-15 | 1995-08-15 | Enlarging volume decompression returned blood device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95219284U CN2226457Y (en) | 1995-08-15 | 1995-08-15 | Enlarging volume decompression returned blood device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2226457Y true CN2226457Y (en) | 1996-05-08 |
Family
ID=33867526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95219284U Expired - Fee Related CN2226457Y (en) | 1995-08-15 | 1995-08-15 | Enlarging volume decompression returned blood device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2226457Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348280C (en) * | 2004-02-19 | 2007-11-14 | 陈志清 | Membrane type sensitive back blood heating-magnetization filter |
| CN100441246C (en) * | 2006-07-12 | 2008-12-10 | 贾宇东 | Tunnel film type sensitive blood-back vena needle |
-
1995
- 1995-08-15 CN CN95219284U patent/CN2226457Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348280C (en) * | 2004-02-19 | 2007-11-14 | 陈志清 | Membrane type sensitive back blood heating-magnetization filter |
| CN100441246C (en) * | 2006-07-12 | 2008-12-10 | 贾宇东 | Tunnel film type sensitive blood-back vena needle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |