Valvulotome: Difference between revisions
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{{confusing|date=July 2014|reason=Much more detail is needed to explain significance of this device and how/when it is used}} |
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A '''valvulotome''' is a catheter-based controllable surgical instrument used for cutting or disabling the [[venous valves]].<ref>{{Cite web |title=Valvulotome |url=https://starfishmedical.com/projects/valvulotome/ |access-date=2022-11-15 |website=StarFish Medical |language=en-US}}</ref> This is needed to enable an in situ bypass in patients with an occluded artery (especially femoral artery), where the saphenous vein is disconnected from the venous system and connected to arteries above and below the occluded segment to allow blood to flow to the lower leg. |
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A '''valvulotome''' is a medical device used to destroy the [[venous valves]] in especially the [[Great saphenous vein|GSV]] to allow for arterial flow. |
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Since the leg veins usually contain a number of valves that direct flow towards the heart, they cannot directly be used as graft, but if vein valves are removed the arterial blood can flow via the [[Great saphenous vein|GSV]] to the lower leg - this is called an in situ graft procedure, a type of [[vascular bypass]].<ref>Donaldson MC, Mannick JA, Whittemore AD., "Femoral-distal bypass with in situ greater saphenous vein. Long-term results using the Mills valvulotome", ''Ann. Surg.'' 1991 May; 213(5): 457-64; discussion 464-5.</ref><ref>Dardik H, Vazquez R, Silvestri F, Ibrahim IM, Sussman B, Kahn M, Wolodiger F., "Experience with a new valvulotome for lower-extremity revascularization procedures by the in situ method", ''Cardiovasc Surg.'' 1995 Apr; 3(2): 193-7.</ref> |
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The valvulotome itself is a long, flexible catheter with a recessed cutting blade at its end for the destruction of venous valves. The valvulotome is inserted at the distal end of the vein, guided to the proximal end, then withdrawn. It is during withdrawal that the valves are destroyed. The blade is designed to prevent exposure of the vein intima to the sharp cutting surface to avoid damage to the vessel wall. It is often designed resembling a hook, with a blunt outer surface and a sharp inner surface that makes contact with the venous valve as the device is withdrawn, but not during insertion.<ref>{{cite patent|title=Valvulotome and method of using|pubdate=Dec 17, 1996|inventor2-last=Howell|inventor3-last=Wicherski|inventor-first=Thomas J.|inventor2-first=Thomas A.|inventor3-first=Jan R.|country=US|number=5584842}}</ref> |
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==References== |
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{{Reflist}} |
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Since the leg veins usually contain a number of valves that direct flow towards the heart, they cannot directly be used as graft, but if vein valves are removed the arterial blood can flow via the great saphenous vein to the lower leg - this is called an in situ graft procedure, a type of [[vascular graft]]. |
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<ref> Donaldson MC1, Mannick JA, Whittemore AD. |
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Femoral-distal bypass with in situ greater saphenous vein. Long-term results using the Mills valvulotome. |
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Ann Surg. 1991 May;213(5):457-64; discussion 464-5. |
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</ref> |
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[[Category:Medical devices]] |
[[Category:Medical devices]] |
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{{medical-equipment-stub}} |
{{medical-equipment-stub}} |
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Latest revision as of 20:37, 15 November 2022
 | This article may be confusing or unclear to readers. In particular, Much more detail is needed to explain significance of this device and how/when it is used. (July 2014) |
A valvulotome is a catheter-based controllable surgical instrument used for cutting or disabling the venous valves.[1] This is needed to enable an in situ bypass in patients with an occluded artery (especially femoral artery), where the saphenous vein is disconnected from the venous system and connected to arteries above and below the occluded segment to allow blood to flow to the lower leg.
Since the leg veins usually contain a number of valves that direct flow towards the heart, they cannot directly be used as graft, but if vein valves are removed the arterial blood can flow via the GSV to the lower leg - this is called an in situ graft procedure, a type of vascular bypass.[2][3]
The valvulotome itself is a long, flexible catheter with a recessed cutting blade at its end for the destruction of venous valves. The valvulotome is inserted at the distal end of the vein, guided to the proximal end, then withdrawn. It is during withdrawal that the valves are destroyed. The blade is designed to prevent exposure of the vein intima to the sharp cutting surface to avoid damage to the vessel wall. It is often designed resembling a hook, with a blunt outer surface and a sharp inner surface that makes contact with the venous valve as the device is withdrawn, but not during insertion.[4]
References
[edit]- ^ "Valvulotome". StarFish Medical. Retrieved 2022-11-15.
- ^ Donaldson MC, Mannick JA, Whittemore AD., "Femoral-distal bypass with in situ greater saphenous vein. Long-term results using the Mills valvulotome", Ann. Surg. 1991 May; 213(5): 457-64; discussion 464-5.
- ^ Dardik H, Vazquez R, Silvestri F, Ibrahim IM, Sussman B, Kahn M, Wolodiger F., "Experience with a new valvulotome for lower-extremity revascularization procedures by the in situ method", Cardiovasc Surg. 1995 Apr; 3(2): 193-7.
- ^ US 5584842, "Valvulotome and method of using", published Dec 17, 1996
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