CN105148388A - Negative pressure anal drainage drug injector and manufacturing method thereof - Google Patents
Negative pressure anal drainage drug injector and manufacturing method thereof Download PDFInfo
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- CN105148388A CN105148388A CN201510483655.3A CN201510483655A CN105148388A CN 105148388 A CN105148388 A CN 105148388A CN 201510483655 A CN201510483655 A CN 201510483655A CN 105148388 A CN105148388 A CN 105148388A
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- negative pressure
- injecting device
- drainage
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Abstract
The invention discloses a negative pressure anal drainage drug injector and a manufacturing method thereof. The drug injector comprises at least one pipeline product for dredging liquid circulation, wherein a small-diameter fluid drainage opening is formed in the pipeline product; a plurality of seal caps are sequentially arranged on the pipeline product along the centerline of the pipeline; thin layers which are convenient for branched drainage pipelines to be inserted are arranged below the seal caps; an inclined puncture tip is arranged on the port of the pipeline product; a multi-way valve is arranged at one end of the pipeline product; and a drug injector and a negative pressure bottle are additionally arranged on the multi-way valve; and the invention also provides a manufacturing method, wherein the manufacturing method comprises steps of mixing, reacting, extrusion-molding, injection-molding, disinfecting, thinning, covering and the like. The drug injector disclosed by the invention is conducive to succession of the branch drainage pipelines as well as access of the drug injector in a drainage process, and is convenient to fix the branch drainage pipelines; and the drug injector is smooth and soft in pipeline, low in irritation to wounds, low in cost and good in drainage effect.
Description
Technical field
The present invention relates to medical field, particularly anus negative pressure drainage medicine injecting device and manufacture method thereof.
Background technology
Negative pressure drainage is the technology that a kind of VSD material, semipermeable membrane, three-way valve and vacuum extractor carry out vacuum suction.Along with socioeconomic growth, the patient with difficult miscellaneous diseases also increases gradually, therefore, is also increased gradually by the patient of drainage treatment.
Now current, Colon and rectum operation and operation on anus are very common operations, Post operation, need to carry out drain to Colon and rectum and anus, ensure certain pressure in anal orifice and rectal intestine and intestinal juice, secretions draws smoothly, the drainage tube drain that current drainage system many employings bi-directional negative pressure bottle connects, may occur the situation of the medicine injecting device shunting or access multiple different liquid medicine in drainage process, original three-way valve can not satisfy the demands.
Current small-bore drainage tube makes and need carry out punching or boring by the means of machinery, electricity, optics and chemistry, and goods complete the step of certain boring, particularly makes the drainage pipe be convenient to branched pipe and continued, very difficult.
Summary of the invention
Based on this, for technical problem, be necessary to propose anus negative pressure drainage medicine injecting device and manufacture method thereof, be convenient to continuing and shunting of pipeline, with low cost, need not repeatedly take out and be inserted into injection process, stimulate little to wound, drainage effect is good.
Technical scheme of the present invention is: anus negative pressure drainage medicine injecting device, comprise at least one for dredging the piping articles of liquid communication, described piping articles is provided with small-diameter fluid conduction, described piping articles is provided with multiple capping successively along on pipe centerline, capping has the thin skin layer be convenient to branch's drainage pipe and inserted, the port of described piping articles is provided with the puncture tip of inclination, and one end of described piping articles is provided with multiway valve, and multiway valve is also provided with medicine injecting device and negative pressure bottle.
This unique design of the present invention, be convenient to continuing of branch's drainage pipe, only need with capping root for basic point, raise the non-close face of capping, the puncture tip of branch's drainage pipe is inserted the thin skin layer below capping, again capping is fitted on branch's drainage tube, wraps up with medical proof fabric, convenient and practical.
Preferably, described capping is transparent arc capping, the root of capping is connected with the outer surface of piping articles, the end of capping is the non-close face of circular arc, and the non-close face around root takes the shape of the letter U, and this design is convenient to branch's drainage tube from non-close face insertion thin skin layer, the twisting force of capping root, make whole capping be close to branch's drainage tube, then by the capping of medical proof fabric looping and branch's drainage tube, play fixation.
Preferably, described piping articles is provided with the arrangements for speed regulation controlling flow rate of liquid, is convenient to the flow speed control of fluid.
Preferably, medicine injecting device and multiway valve clamping, medicine injecting device is provided with the opening for fill medicine, can fill Chinese medicine, liquid Western medicine or powdered drug.
Preferably, the diameter range d of the small-diameter fluid conduction of described piping articles is 0.02cm ~ 0.25cm, and the thickness of draining hole is in the scope of 0.008cm to 0.03cm.
Further, the manufacture method of anus negative pressure drainage medicine injecting device, comprises the following steps:
A, by polypropylene 40% ~ 70%, Tissuemat E 8% ~ 10%, polyurethane 8% ~ 10%, polyester thermoplastic elastomer 5% ~ 8%, nanometer silver powder 2% ~ 3%, methacrylate 0.5% ~ 1%, paraffin 0.2% ~ 0.5%, butyl acrylate 0.5% ~ 2%, alkyl starches ester 1% ~ 3%, ammonium hydroxide 0.2% ~ 0.8%, sodium bicarbonate 0.1% ~ 0.2%, sodium lauryl sulfate 0.4% ~ 2%, titanium dioxide 0.5% ~ 3%, the weight ratio proportioning of glycerol 1% ~ 3%, stirs after mixing;
B, each component mixture is put into reactor, under ammonia condition, be heated to 75 DEG C ~ 85 DEG C, stirring reaction 45 ~ 60 minutes;
C, reacted mixture is sent into extrusion molding in extruding machine, be divided into three temperature stage in extruding machine, first temperature stage is 160 DEG C ~ 200 DEG C, and second temperature stage is 210 DEG C ~ 240 DEG C, and the 3rd temperature stage is 240 DEG C ~ 270 DEG C;
D, controlled pressure value at 5KPA ~ 15KPA, and progressively reduce within the scope of temperature to 120 DEG C ~ 150 DEG C, obtain extruded mixture;
E, mixture is sent into injection machine carry out injection mo(u)lding, obtain piping articles;
F, thin desired location by laser, and the upper cover that bonds.
The method is controlled by the temperature of different phase, and the temperature of material is controlled more accurate, melt viscosity is reduced and is conducive to plasticizing, the flow rate of the volume of melt increases, and extruded velocity is accelerated, and production efficiency improves; Before extrusion molding, be suitable for the temperature reducing reactant mixture, contribute to the moulding of extrudate, the too high stability that can affect extrudate shape of temperature, the shrinkage factor of extrudate increases, and even makes extrusion normally not carry out time serious.
Preferably, it comprises the step increasing branch's drainage pipe, specific as follows:
A, the arrangements for speed regulation screwed on piping articles and the second drainage pipe;
B, by the puncture tip spray disinfectant liquid medicine of the second drainage pipe, push capping aside, puncture in piping articles along thin skin layer;
C, use band colligation puncture position, and the arrangements for speed regulation on piping articles and the second drainage pipe of outwarding winding.
The connecting method of this branch's drainage pipe, only need insert the thin skin layer of former pipeline by the puncture tip of lateral, convenient and swift, avoids the phenomenon needing frequently to change pipeline.
Preferably, the liquid medicine that in medicine injecting device, fill is pre-configured, it comprises medicinal liquid, ointment and powdery medicine, and the Chinese medicine etc. as boiled all delivers to injury place by this medicine injecting device, its fill and easy for installation, avoids tradition to bring pathogenic bacteria into by medicinal cotton swab wiping.
Preferably, the step that described laser thins, specific as follows:
A, with 15% iodine disinfection piping articles surface;
B, setting laser power are 1 ~ 2KW, and laser beam scanning speed is 10 ~ 20mm/s, and spot diameter is that the desired location of 1 ~ 3mm to piping articles thins process;
C, thinning the capping that to bond above position.
The method utilizes laser to polish, efficient quick, avoids traditional grinding technology to bring the shortcoming of a large amount of pathogenic bacteria into piping articles simultaneously, simultaneously thinning position bonding capping, using band colligation, make two pipeline no leakage, not fluids after being beneficial to branch connection.
Preferably, after mold pressing makes piping articles, also comprise piping articles alcohol disinfecting or high-temperature sterilization.
The invention has the beneficial effects as follows:
(1) be provided with capping and thin skin layer, be conducive to continuing and the access of medicine injecting device of branch's drainage pipe in drainage process;
(2) design of capping be convenient to drainage pipe continue after wrapping fix, the flow rate of liquid of two pipelines after continuing is consistent, the impact do not continued;
(3) adopt injection molding forming method to make drainage pipe, pipeline is smooth, soft, little to the stimulation of wound, with low cost, and drainage effect is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of inventive embodiments;
In figure, 10-piping articles, 20-capping, 30-thin skin layer, 40-punctures tip, 50-multiway valve.
Detailed description of the invention
Below embodiments of the invention are described in detail.
Embodiment 1:
As shown in Figure 1, present embodiments provide a kind of anus negative pressure drainage medicine injecting device, this medicine injecting device comprises at least one for dredging the piping articles 10 of liquid communication, described piping articles 10 is provided with small-diameter fluid conduction, along pipe centerline being provided with successively multiple capping 20 on described piping articles 10, capping 20 has the thin skin layer 30 be convenient to branch's drainage pipe and inserted, the port of described piping articles 10 is provided with the puncture tip 40 of inclination, one end of described piping articles 10 is provided with multiway valve 50, and multiway valve 50 is also provided with medicine injecting device and negative pressure bottle.
In the present embodiment, described capping 20 is transparent arc capping, the root of capping 20 is connected with the outer surface of piping articles 10, the end of capping 20 is the non-close face of circular arc, and the non-close face around root takes the shape of the letter U, and this design is convenient to branch's drainage tube from non-close face insertion thin skin layer 30, the twisting force of capping 20 root, make whole capping 20 be close to branch's drainage tube, then by medical proof fabric looping capping 20 and branch's drainage tube, play fixation.
In the present embodiment, described piping articles 10 is provided with the arrangements for speed regulation controlling flow rate of liquid, is convenient to the flow speed control of fluid.
In the present embodiment, medicine injecting device and multiway valve 50 clamping, medicine injecting device is provided with the opening for fill medicine, can fill Chinese medicine, liquid Western medicine or powdered drug.
In the present embodiment, the diameter range d of the small-diameter fluid conduction of described piping articles 10 is 0.02cm ~ 0.25cm, and the thickness of draining hole is in the scope of 0.008cm to 0.03cm.
In the present embodiment, for the patient of crissum subcutaneous abscess drain, in concrete therapeutic process, first determine patient data, then determine drainage material according to patient profiles, described drainage material comprises 1. foam dressing, adopt white foam type synthetic dressing, be generally nonirritant, tension stress is strong, has the material of good plasticity, water penetration and biocompatibility; 2. pad pasting, has fine air permeability, energy waterproof, to the pad pasting of no skin irritation, and the general transparent pad pasting of 3M adopting Minnesota Mining and Manufacturing Company to produce; 3. drainage tube, i.e. piping articles 10, adopt tube chamber not subside, do not block, can ensure the drainage tube that drain is unobstructed, generally select the cheap Applied Materials such as stomach tube, sputum aspirator tube, extension tube or Oxygen tube according to wound area and drain range size; 4. negative pressure bottle, adopts bottle good springiness, unidirectional negative pressure bottle easy to carry, and the negative pressure value scope that this negative pressure bottle produces is: 125-450mmHg.
In general, the size of negative pressure can the weight of extrusion bottle regulate, the negative pressure persistent period is long, negative pressure can be produced equally by exogenous machine drawn, the main external connecting negative pressure suction pump of adjustment of negative pressure regulates, and the observation of force value, normally by the scale of vacuum table, also can be judged by the extruding degree of negative pressure bottle simultaneously, when drain hydroful, bottle cap of can outwarding winding removes liquid.Reliable anti-backflow device extrusion bottle, when aerofluxus, gas, liquid all adverse current can not enter drainage pipe goods.The one end of the Y shape union joint be connected with drainage pipe goods 10 is also connected to medicine injecting device, while drainage process, can open medicine injecting device valve, injection of medicine in wound surface.According to the situation of patient, repeatedly can inject different pharmaceutical, guarantee that patient's drain is after surgery unobstructed, avoid repeatedly inserting anal canal in medication process simultaneously, dampen wound surface, alleviate tissue edema.
Preferably, in drainage process, available second drainage pipe continues, and utilizes puncture tip 40 through the thin skin layer of former drainage pipe goods 10, then seizes with medical proof fabric.Similar, when needs separately connect medicine injecting device, need not access from original three-way valve, can directly continue from piping articles 10, need after access to keep the pressure in medicine injecting device, refluence phenomenon can not be caused.
Embodiment 2:
Present embodiments provide a kind of manufacture method of anus negative pressure drainage medicine injecting device, comprise the following steps:
Step one, by polypropylene 50%, Tissuemat E 10%, polyurethane 10%, polyester thermoplastic elastomer 8%, nanometer silver powder 3%, methacrylate 1%, paraffin 0.5%, butyl acrylate 2%, alkyl starches ester 3%, ammonium hydroxide 0.8%, sodium bicarbonate 0.2%, sodium lauryl sulfate 2%, titanium dioxide 3%, the weight ratio proportioning of glycerol 3%, stirs after mixing;
Step 2, puts into reactor by each component mixture, is heated to 75 DEG C under ammonia condition, stirring reaction 45 minutes;
Step 3, reacted mixture is sent into extrusion molding in extruding machine, and be divided into three temperature stage in extruding machine, first temperature stage is 160 DEG C, and second temperature stage is 210 DEG C, and the 3rd temperature stage is 240 DEG C;
Step 4, controlled pressure value at 5KPA, and progressively reduces temperature to 120 DEG C, obtains extruded mixture;
Step 5, sends into injection machine and carries out injection mo(u)lding, obtain piping articles by mixture;
Step 6, thins desired location by laser, and the upper cover that bonds.
Embodiment 3:
The present embodiment provides a kind of manufacture method of anus negative pressure drainage medicine injecting device, comprises the following steps:
Step one, by polypropylene 60%, Tissuemat E 8%, polyurethane 9%, polyester thermoplastic elastomer 7%, nanometer silver powder 2%, methacrylate 0.8%, paraffin 0.4%, butyl acrylate 1%, alkyl starches ester 2%, ammonium hydroxide 0.5%, sodium bicarbonate 0.2%, sodium lauryl sulfate 1%, titanium dioxide 2%, the weight ratio proportioning of glycerol 2%, stirs after mixing;
Step 2, puts into reactor by each component mixture, is heated to 80 DEG C under ammonia condition, stirring reaction 50 minutes;
Step 3, reacted mixture is sent into extrusion molding in extruding machine, and be divided into three temperature stage in extruding machine, first temperature stage is 180 DEG C, and second temperature stage is 220 DEG C, and the 3rd temperature stage is 250 DEG C;
Step 4, controlled pressure value at 8KPA, and progressively reduces within the scope of temperature to 130 DEG C, obtains extruded mixture;
Step 5, sends into injection machine and carries out injection mo(u)lding, obtain piping articles by mixture;
Step 6, thins desired location by laser, and the upper cover that bonds.
Embodiment 4:
The present embodiment provides a kind of manufacture method of anus negative pressure drainage medicine injecting device, comprises the following steps:
Step one, by polypropylene 70%, Tissuemat E 8%, polyurethane 8%, polyester thermoplastic elastomer 7%, nanometer silver powder 2.5%, methacrylate 0.8%, paraffin 0.4%, butyl acrylate 1%, alkyl starches ester 2.5%, ammonium hydroxide 0.5%, sodium bicarbonate 0.1%, sodium lauryl sulfate 1.5%, titanium dioxide 2.5%, the weight ratio proportioning of glycerol 2.5%, stirs after mixing;
Step 2, puts into reactor by each component mixture, is heated to 85 DEG C under ammonia condition, stirring reaction 60 minutes;
Step 3, reacted mixture is sent into extrusion molding in extruding machine, and be divided into three temperature stage in extruding machine, first temperature stage is 200 DEG C, and second temperature stage is 240 DEG C, and the 3rd temperature stage is 270 DEG C;
Step 4, controlled pressure value at 15KPA, and progressively reduces within the scope of temperature to 150 DEG C, obtains extruded mixture;
Step 5, sends into injection machine and carries out injection mo(u)lding, obtain piping articles by mixture;
Step 6, thins desired location by laser, and the upper cover that bonds.
Above embodiment is all further comprising the steps of:
Increase the step of branch's drainage pipe, specific as follows:
A, the arrangements for speed regulation screwed on piping articles and the second drainage pipe;
B, by the puncture tip spray disinfectant liquid medicine of the second drainage pipe, push capping aside, puncture in piping articles along thin skin layer;
C, use band colligation puncture position, and the arrangements for speed regulation on piping articles and the second drainage pipe of outwarding winding.
The connecting method of this branch's drainage pipe, only need insert the thin skin layer of former pipeline by the puncture tip of lateral, convenient and swift, avoids the phenomenon needing frequently to change pipeline.
Further, can the pre-configured liquid medicine of fill in medicine injecting device, it comprises medicinal liquid, ointment and powdery medicine, and the Chinese medicine etc. as boiled all delivers to injury place by this medicine injecting device, its fill and easy for installation, avoids tradition to bring pathogenic bacteria into by medicinal cotton swab wiping.
The step that laser thins, specific as follows:
A, with 15% iodine disinfection piping articles surface;
B, setting laser power are 1 ~ 2KW, and laser beam scanning speed is 10 ~ 20mm/s, and spot diameter is that the desired location of 1 ~ 3mm to piping articles thins process;
C, thinning the capping that to bond above position.
The method utilizes laser to polish, efficient quick, avoids traditional grinding technology to bring the shortcoming of a large amount of pathogenic bacteria into piping articles simultaneously, simultaneously thinning position bonding capping, using band colligation, make two pipeline no leakage, not fluids after being beneficial to branch connection.
Sterilisation step, after mold pressing makes piping articles, also comprises piping articles alcohol disinfecting or high-temperature sterilization.
The above embodiment only have expressed the specific embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. anus negative pressure drainage medicine injecting device, comprise at least one for dredging the piping articles of liquid communication, described piping articles is provided with small-diameter fluid conduction, it is characterized in that, described piping articles is provided with multiple capping successively along on pipe centerline, and capping has the thin skin layer be convenient to branch's drainage pipe and inserted, and the port of described piping articles is provided with the puncture tip of inclination, one end of described piping articles is provided with multiway valve, and multiway valve is also provided with medicine injecting device and negative pressure bottle.
2. anus negative pressure drainage medicine injecting device according to claim 1, it is characterized in that, described capping is transparent arc capping, and the root of capping is connected with the outer surface of piping articles, the end of capping is the non-close face of circular arc, and the non-close face around root takes the shape of the letter U.
3. anus negative pressure drainage medicine injecting device according to claim 1, is characterized in that, described piping articles is provided with the arrangements for speed regulation controlling flow rate of liquid.
4. anus negative pressure drainage medicine injecting device according to claim 1, it is characterized in that, medicine injecting device and multiway valve clamping, medicine injecting device is provided with the opening for fill medicine.
5. anus negative pressure drainage medicine injecting device according to claim 1, it is characterized in that, the diameter range d of the small-diameter fluid conduction of described piping articles is 0.02cm ~ 0.25cm.
6. the manufacture method of anus negative pressure drainage medicine injecting device, is characterized in that, comprises the following steps:
A, by polypropylene 40% ~ 70%, Tissuemat E 8% ~ 10%, polyurethane 8% ~ 10%, polyester thermoplastic elastomer 5% ~ 8%, nanometer silver powder 2% ~ 3%, methacrylate 0.5% ~ 1%, paraffin 0.2% ~ 0.5%, butyl acrylate 0.5% ~ 2%, alkyl starches ester 1% ~ 3%, ammonium hydroxide 0.2% ~ 0.8%, sodium bicarbonate 0.1% ~ 0.2%, sodium lauryl sulfate 0.4% ~ 2%, titanium dioxide 0.5% ~ 3%, the weight ratio proportioning of glycerol 1% ~ 3%, stirs after mixing;
B, each component mixture is put into reactor, under ammonia condition, be heated to 75 DEG C ~ 85 DEG C, stirring reaction 45 ~ 60 minutes;
C, reacted mixture is sent into extrusion molding in extruding machine, be divided into three temperature stage in extruding machine, first temperature stage is 160 DEG C ~ 200 DEG C, and second temperature stage is 210 DEG C ~ 240 DEG C, and the 3rd temperature stage is 240 DEG C ~ 270 DEG C;
D, controlled pressure value at 5KPA ~ 15KPA, and progressively reduce within the scope of temperature to 120 DEG C ~ 150 DEG C, obtain extruded mixture;
E, mixture is sent into injection machine carry out injection mo(u)lding, obtain piping articles;
F, thin desired location by laser, and the upper cover that bonds.
7. the manufacture method of anus negative pressure drainage medicine injecting device according to claim 6, is characterized in that, also comprises the step increasing branch's drainage pipe, specific as follows:
A, the arrangements for speed regulation screwed on piping articles and the second drainage pipe;
B, by the puncture tip spray disinfectant liquid medicine of the second drainage pipe, push capping aside, puncture in piping articles along thin skin layer;
C, use band colligation puncture position, and the arrangements for speed regulation on piping articles and the second drainage pipe of outwarding winding.
8. the manufacture method of anus negative pressure drainage medicine injecting device according to claim 6, it is characterized in that, the liquid medicine that in medicine injecting device, fill is pre-configured, it comprises medicinal liquid, ointment and powdery medicine.
9. the manufacture method of anus negative pressure drainage medicine injecting device according to claim 6, is characterized in that, in step e, and the step that described laser thins, specific as follows:
A, with 15% iodine disinfection piping articles surface;
B, setting laser power are 1 ~ 2KW, and laser beam scanning speed is 10 ~ 20mm/s, and spot diameter is that the desired location of 1 ~ 3mm to piping articles thins process;
C, thinning the capping that to bond above position.
10. the manufacture method of anus negative pressure drainage medicine injecting device according to claim 6 or 9, is characterized in that, after injection mo(u)lding piping articles, also comprise piping articles alcohol disinfecting or high-temperature sterilization.
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| CN201510483655.3A CN105148388B (en) | 2015-08-07 | 2015-08-07 | Anus negative pressure drainage medicine injecting device and its manufacturing method |
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| CN201510483655.3A CN105148388B (en) | 2015-08-07 | 2015-08-07 | Anus negative pressure drainage medicine injecting device and its manufacturing method |
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Citations (6)
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|---|---|---|---|---|
| EP0011795A1 (en) * | 1978-11-22 | 1980-06-11 | Intermedicat GmbH | Method for the fabrication of plastic tubes serving as drainage probes for wounds, in particular tubes provided with an antithrombogenic skin, and plastic tubes obtained |
| WO2000069498A1 (en) * | 1999-05-14 | 2000-11-23 | Boston Scientific Limited | Drainage catheter delivery system |
| CN101259029A (en) * | 2008-04-16 | 2008-09-10 | 林平 | Disposable thoracic drainage needle |
| CN201631886U (en) * | 2010-04-20 | 2010-11-17 | 温州医学院附属口腔医院 | Negative-pressure closed drainage device |
| US20130023842A1 (en) * | 2010-03-23 | 2013-01-24 | Wuhan Vsd Medical Science & Technology Co., Ltd. | Medical vacuum sealing drainage device |
| CN204134011U (en) * | 2014-09-30 | 2015-02-04 | 姚学华 | A kind of biliary tract anti-reflux drainage catheter |
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2015
- 2015-08-07 CN CN201510483655.3A patent/CN105148388B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0011795A1 (en) * | 1978-11-22 | 1980-06-11 | Intermedicat GmbH | Method for the fabrication of plastic tubes serving as drainage probes for wounds, in particular tubes provided with an antithrombogenic skin, and plastic tubes obtained |
| WO2000069498A1 (en) * | 1999-05-14 | 2000-11-23 | Boston Scientific Limited | Drainage catheter delivery system |
| CN101259029A (en) * | 2008-04-16 | 2008-09-10 | 林平 | Disposable thoracic drainage needle |
| US20130023842A1 (en) * | 2010-03-23 | 2013-01-24 | Wuhan Vsd Medical Science & Technology Co., Ltd. | Medical vacuum sealing drainage device |
| CN201631886U (en) * | 2010-04-20 | 2010-11-17 | 温州医学院附属口腔医院 | Negative-pressure closed drainage device |
| CN204134011U (en) * | 2014-09-30 | 2015-02-04 | 姚学华 | A kind of biliary tract anti-reflux drainage catheter |
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