Microsurgical training apparatus

• US 5,320,537 A
• Filed: 03/16/1993
• Issued: 06/14/1994
• Est. Priority Date: 03/16/1993
• Status: Expired due to Fees

• Current Assignee: Pyramid Technologies International Incorporated
• Original Assignee: Gulf Research and Development Company
• Inventors: Watson, Neil A.
• Primary Examiner(s): Mancene, Gene
• Assistant Examiner(s): Smith, Jeffrey A.
• Application Number:
  US08/033,562
• Time in Patent Office: 455 Days
• Field of Search: 434/272, 434/268, 434/267, 434/262
• US Class Current: 434/272
• CPC Class Codes: G09B 23/28 for medicine

Abstract

The invention relates to a disposable, life-like module for use in training physicians and surgeons in the techniques of both human and veterinary microsurgical anastomosis. The module comprises a housing defining a cavity. A pair of spaced apart connectors are connected to the housing and extend therethrough. Each of the connectors includes a bore defining an internal channel for allowing the movement of a fluid through the housing. Each of the channels includes a first end external of the cavity adapted to be in fluid communication with a reservoir and a second end internal of the cavity. A first layer simulates muscle tissue and spans the cavity. An elongate simulated vascular or neurovascular bundle having proximal ends and distal ends spans the chamber and is connected to the respective second connector ends. A pump pumps a fluid simulated blood through a fluid circuit and an optional controller provides pulsatile flow.

Claims

1. A disposable, life-like, module for use in training physicians in the techniques of microsurgical anastomosis adapted for use in a system including a reservoir that holds a fluid simulating blood, a pump for pumping the simulated blood, tubing connecting the reservoir to the pump to the module and providing a fluid circuit, the module comprising:

a housing defining a cavity;

a pair of spaced-apart connector means connected to said housing and extending therethrough, each of said connector means includes a bore defining an internal channel for allowing the movement of a fluid through the housing, each of said channels including a first end external of said cavity adapted to be in fluid communication with a reservoir and a second end internal of said cavity;

a first layer simulating the surface of human muscle tissue spanning said cavity;

an elongate simulated human circulatory organ having a proximal end and a distal end and spanning said cavity and overlying said first layer, said organ having a hollow core, the proximal end and the distal end of said organ being connected to a respective one of the connector means adjacent said second channel ends,

and further wherein said human circulatory organ comprises a first hollow layer of a first consistency and texture and a second layer surrounding and adhering to said first hollow layer, and wherein said second layer has a different consistency and texture from said first layer;

whereby when the simulated blood is flowing through the human circulatory organ, the human circulatory organ may be transected to produce an injury site and microsurgical anastomosis can be performed under life-like conditions.

2. The module for training microsurgical anastomosis according to claim 1 wherein said first layer comprises an absorbent cellulose pad.

3. The module for training microsurgical anastomosis according to claim 2 wherein said cellulose pad is treated with a non-reflective dye to create a life-like background for practicing microvascular anastomosis.

4. The module for training microsurgical anastomosis according to claim 1 wherein said first hollow layer and said second layer are formed from different combinations selected from the group consisting of urethanes and polyurethanes and a plasticizer.

5. The module for training microsurgical anastomosis according to claim 1 further including a base means for elevating and supporting the module said base means comprising:

a casing having a bottom adapted to be placed in contact with a support and a top adapted to contactingly receive said module;

a first plug means and a second plug means operatively associated with the top of said base means, each of said plug means having one end adapted to matingly receive the respective external end of said connector and an opposite end adapted to be in fluid communication with said reservoir.

6. The module according to claim 1 wherein said human circulatory organ has an external diameter of approximately 1.00 mm.

7. A model for use in the training of microsurgical anastomosis techniques, characterized by its life-like appearance and texture, comprising:

a housing defining a cavity;

a pair of spaced apart connector means connected to said housing and extending therethrough, each of said connector means including an internal channel for allowing the movement of a fluid through said housing, each of said channels including a first end external of said cavity in fluid communication with a reservoir and a second end disposed within said cavity;

a first layer simulating human muscle tissue spanning said chamber;

an elongate simulated human circulatory organ having a proximal end and a distal end and spanning said chamber and overlying said first layer, the respective ends of said organ being connected to the respective connector means adjacent said internal channel second ends;

and further wherein said human circulatory organ comprises a first hollow layer of a first consistency and texture and a second a second layer surrounding and adhering to said first hollow layer, and wherein said second layer has a different consistency and texture from said first layer;

a reservoir adapted to hold a fluid simulating blood;

a fluid simulating blood;

a pump for pumping said simulated blood;

tubing connecting said reservoir to said pump to the respective first ends of said connector means and providing a fluid circuit,

whereby when the simulated blood is flowing through the circulatory organ, the organ may be transected to produce an injury site and microsurgical anastomosis can be performed under life-like conditions.

8. The model according to claim 7 wherein said first layer comprises cellulose.

9. The model according to claim 7 wherein said first layer comprises cellulose impregnated with dye to produce a non-reflective background.

10. The model according to claim 7 wherein said pump includes a control means for controlling the pump so as to create a life-like pulsatile flow within said organ.

11. A disposable, life-like, module for use in training physicians in the techniques of microsurgical anastomosis adapted to be used in combination with a system including a reservoir that holds a fluid simulating blood, a pump for pumping the simulated blood, tubing connecting the reservoir to the pump to the module and providing a fluid circuit, the module comprising:

a housing defining a cavity;

a pair of spaced apart connector means connected to said housing and extending therethrough, each of said connector means includes a bore defining an internal channel for allowing the movement of a fluid through the housing;

each of said channels including a first end external of said cavity adapted to be in fluid communication with the reservoir and a second end internal of said cavity;

a layer simulating the surface of human muscle tissue spanning said cavity;

an elongated simulated human neurovascular organ means comprising first and second hollow simulated blood vessels, each having an external diameter of approximately 1.0 mm, the first of said blood vessels simulating an artery and the second of said blood vessels having a thinner vessel wall than the first end simulating a vein, each of said blood vessels having proximal and distal ends and spanning said cavity, and the respective proximal ends and distal ends of said first and second blood vessels being connected to a respective one of said connector ends so that the first and second blood vessels lie in side by side relation forming two parallel fluid channels, a simulated human neural organ comprising three elongate strands of simulated neural material encased in a simulated epineurium, said neural organ having an external diameter of approximately 1.2 mm,

whereby when the simulated blood is flowing through the simulated blood vessels and the simulated blood vessels may be transected to produce an injury site wherein end-to-end anastomosis of artery and vein, end-to-side anastomosis and interpositional vein grafting may be performed under life-like conditions and transection of the simulated neural organ produces an injury site wherein end to end anastomosis of the simulated neural organ may be performed.

12. The module according to claim 11 wherein said simulated artery comprises a first hollow layer of a first consistency and texture and a second layer surrounding and adhering to said first hollow layer, and wherein said second layer has a different consistency and texture from said first layer.

13. The module for training microsurgical anastomosis according to claim 12 wherein said simulated vein comprises a first hollow layer of a third consistency and texture and a fourth layer surrounding and adhering to said third hollow layer, and wherein said third and fourth layers have different consistency from each other and from the first and second layers.

14. The module for training microsurgical anastomosis according to claim 13 wherein said simulated human neural organ comprises simulated neural material having a consistency different than that of said simulated epineurium.

15. The module for training microsurgical anastomosis according to claim 14 wherein said simulated neural material and said simulated epineurium are formed from different combinations of urethanes and polyurethanes and a plasticizer.

16. The module for training microsurgical anastomosis according to claim 13 wherein said first, second, third and fourth layers are formed from different combinations of urethanes and polyurethanes and a plasticizer.