CN1227091A - Vena cavae cannula with snare - Google Patents
Vena cavae cannula with snare Download PDFInfo
- Publication number
- CN1227091A CN1227091A CN 98124873 CN98124873A CN1227091A CN 1227091 A CN1227091 A CN 1227091A CN 98124873 CN98124873 CN 98124873 CN 98124873 A CN98124873 A CN 98124873A CN 1227091 A CN1227091 A CN 1227091A
- Authority
- CN
- China
- Prior art keywords
- snare
- vena cavae
- cannula
- umbrella
- caval vein
- 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.)
- Pending
Links
- 239000008280 blood Substances 0.000 claims abstract description 5
- 210000004369 blood Anatomy 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000741 silica gel Substances 0.000 claims abstract description 3
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 3
- 230000000903 blocking effect Effects 0.000 claims abstract 2
- 210000003462 vein Anatomy 0.000 claims description 15
- 229960001866 silicon dioxide Drugs 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 239000012567 medical material Substances 0.000 claims 1
- 238000010992 reflux Methods 0.000 claims 1
- 235000019994 cava Nutrition 0.000 abstract description 8
- 230000034994 death Effects 0.000 abstract description 3
- 231100000517 death Toxicity 0.000 abstract description 3
- 210000003516 pericardium Anatomy 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 210000005245 right atrium Anatomy 0.000 abstract 2
- 210000002620 vena cava superior Anatomy 0.000 description 8
- 238000001356 surgical procedure Methods 0.000 description 4
- 208000032843 Hemorrhage Diseases 0.000 description 3
- 238000007675 cardiac surgery Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 206010003211 Arteriosclerosis coronary artery Diseases 0.000 description 1
- 208000002330 Congenital Heart Defects Diseases 0.000 description 1
- 208000020128 Mitral stenosis Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000000709 aorta Anatomy 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 208000028831 congenital heart disease Diseases 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 208000026758 coronary atherosclerosis Diseases 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000002837 heart atrium Anatomy 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 208000018578 heart valve disease Diseases 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 208000006887 mitral valve stenosis Diseases 0.000 description 1
- 206010030899 opisthotonus Diseases 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 210000001631 vena cava inferior Anatomy 0.000 description 1
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- Prostheses (AREA)
Abstract
The present invention relates to a biomedical technology and is umbrella-like snare and vena cavae cannula made of medical soft elastic silica gel. During heart operation, the present invention is used to avoid adhesion between free heart vena cavae, right atrium cordis and pericardium as well as the sleeve between the upper and the lower vena cavaes can block vena cavae for operation. The present invention solves the problem of making vena cavae free and be sleeved. Blocking the vena cavae blood from returning to right atrium cordis can simplify the operation process, shorten operation period, reduce the complication and death rate of heart operation.
Description
The present invention relates to clinical treatment, particularly the cardiac surgery operation biomedical engineering technology.
Along with the raising of department of cardiac surgery aggregate level, some patients repeatedly accept cardiac surgery operation possibly, as rescuing of complicated congenital heart disease by stages; Bypass surgery once more or repeatedly after the coronary atherosclerosis type heart disease row coronary bypass (bypass surgery): change lobe or the capable valve replacement postoperative of valvular heart disease after the mitral stenosis row enclosed dilatation once more and valve occurs and damage (damaging) and valve surgery related complication (as perivalvular leakage, valve thrombosis etc.) and need to go once more valve replacement surgery etc. as bioprosthetic valve.These patients are because own operation, extensive adhesion, the especially atrium-caval vein place in the pericardial cavity of accepting of heart.Operation need be set up extracorporeal circulation once more.When setting up extracorporeal circulation, need free fully superior vena cava, postcava and right room so that superior vena cava, inferior vena cava cannula and cover band.Because upper and lower caval vein and the extensive adhesion in place, right room, need to separate and dissect with shears, the sharp property separation of electric knife+passivity, unusual effort, time-consuming, and,, may cause massive hemorrhage just in case break in above-mentioned position because of not setting up extracorporeal circulation, death is restrained very high.Often appear at when separating these positions the cause a disease situation of people's injures and deaths of atrium or trauma of vena cava and massive hemorrhage in the clinical practice.So for a long time, reach repeatedly the preceding preparation of extracorporeal circulation of operation on heart once more, become a thorny and dangerous job.The technical solution adopted in the present invention still is not reported both at home and abroad.
The intubate of the said novel zone circle cover of the present invention can avoid extensively separating superior vena cava, postcava and right room.As long as can see right room, then cut an osculum in right room, the intubate of this novel zone circle cover is sent into right room after, further send into caval vein again.At this moment, thus the snare of umbrella can prop up caval vein inwall block venous blood in caval vein flow into right room.
The present invention is mainly used in and plans to implement the secondary or the patient of operation on heart repeatedly, and also can being used for superior vena cava, postcava, to go into right room short or thick and be difficult to free venacaval patient with operation.
Cannulation of venae cava can utilize the umbrella snare to implement blocking-up in superior vena cava, postcava, thereby has avoided being the adhesion between the extensively free right room of blocking-up superior vena cava, postcava, superior vena cava, postcava and the pericardium.
The cannulation of venae cava of zone circle cover is in two sub-sections: the umbrella sample snare made from soft elasticity medical silica-gel (Fig. 1-1., 2-1., 3,4,5,6); Cannulation of venae cava (Fig. 1-2., 2-2.).Two parts can be made an integral body when producing, or separately produce, and are assembled as required on operating-table by the cardiac surgeon.Its operation principle is: its umbrella mouth of umbrella sample snare is opened the distal end to intubate, in use, because the umbrella external diameter is greater than the caval vein internal diameter, and certain force of strain is arranged, when intubate enters caval vein by right room, can in caval vein, prop up the intravenous wall, thus the backflow of block venous blood.Also can be after intubate, behind the blocking-up aorta, cut right room, with the opening direction of umbrella proximal part opisthotonos, make the umbrella opening to caval vein and block venous blood passes back into right room towards intubate.
The present invention compared with prior art has following advantage:
1, saved this operating procedure of adhesion that separates between right room, caval vein, the pericardium;
2, save free superior vena cava, postcava and cover blocking-up and be with this operating procedure.
Thereby ask when farthest having shortened operation, greatly reduced the chance of heart and injury, reduced
Give birth to the danger of massive hemorrhage, reduced mortality rate.
Description of drawings:
Fig. 1: zone circle cover cannulation of venae cava side-looking graphics
Wherein: 1.-umbrella sample snare
2.-cannulation of venae cava
Fig. 2: the whole cutaway view in side position
Fig. 3: umbrella sample snare side-looking graphics
Fig. 4: umbrella sample snare side sectional view
Fig. 5: zone circle cover cannulation of venae cava figure is looked whole at the end
Fig. 6: overlook whole zone circle cover cannulation of venae cava figure
Claims (4)
1, a kind of vena cavae cannula with snare is characterized in that this device is made up of umbrella sample snare (Fig. 1 1.) and intubate (Fig. 1 2.) two parts, and the umbrella mouth is opened to the intubate distal end, and during use, because the umbrella external diameter is greater than the caval vein internal diameter, thereby block venous blood refluxes.
2, according to the described a kind of vena cavae cannula with snare of claim 1, it is characterized in that this intubate can separately produce, assemble during use, also can be used as an integral body and produce.
3, according to the described a kind of vena cavae cannula with snare of claim 1, it is characterized in that blocking way, both available snare is directly blocked caval vein in caval vein, also can it is folding, thereby cover the inlet of caval vein, play from the venacaval effect of the inner blocking-up of caval vein to right room.
4,, it is characterized in that this intubate and umbrella sample snare thereof can adopt soft elasticity medical silica-gel or other to be suitable for medical material and make according to claims 1 described a kind of vena cavae cannula with snare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98124873 CN1227091A (en) | 1998-11-27 | 1998-11-27 | Vena cavae cannula with snare |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98124873 CN1227091A (en) | 1998-11-27 | 1998-11-27 | Vena cavae cannula with snare |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1227091A true CN1227091A (en) | 1999-09-01 |
Family
ID=5228873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98124873 Pending CN1227091A (en) | 1998-11-27 | 1998-11-27 | Vena cavae cannula with snare |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1227091A (en) |
-
1998
- 1998-11-27 CN CN 98124873 patent/CN1227091A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |