Anatomical simulator for videoendoscopic surgical training

• US 5,951,301 A
• Filed: 12/05/1997
• Issued: 09/14/1999
• Est. Priority Date: 06/09/1995
• Status: Expired due to Term

• Current Assignee: Simulab Corporation
• Original Assignee: Simulab Corporation
• Inventors: Younker, Scott B.
• Primary Examiner(s): Hirsch, Paul J.
• Application Number:
  US08/985,480
• Time in Patent Office: 648 Days
• Field of Search: 434/262, 434/267, 434/268, 434/273, 434/272
• US Class Current: 434/272
• CPC Class Codes: G09B 23/28 for medicine
• CPC Class Codes: G09B 23/285 for injections, endoscopy, bronchoscopy, sigmoidscopy, insertion of contraceptive devices or enemas

Abstract

An anatomical simulator system (10) includes a synthetic anatomical torso (12) resting on a base (14). The torso includes an internal cavity (18) and a pneumoperitoneum wall (16). A selected one of a variety of procedure packs (20, 30) is placed inside the cavity for use in training in videoendoscopic surgical techniques. The torso includes a plurality of trocar apertures (22) which permit insertion of videoendoscopic instruments for manipulation, incision, dissection and suturing of synthetic anatomic structure included in the procedure packs. Each procedure pack includes simulated anatomic structures (34,36,38,40) that have a realistic appearance and density, that provide realistic tactile feedback during manipulation and incision, and that are suturable and/or electrocauterizable using endoscopic instruments. The anatomic structures included within the procedure packs are joined together with synthetic connective tissue that is severable to allow dissection of structures without damaging the underlying structures. Pressurized vessels (36) containing synthetic bodily fluids are included to simulate dissectable blood vessels, bile ducts and the like.

Claims

1. An anatomical simulator for surgical training, comprising:

a synthetic anatomical structure including at least one vessel having a resilient wall, the vessel being filled with a fluid; and

a synthetic connective tissue bonding the vessel wall to the synthetic anatomical structure and defining a tissue plane having a predetermined thickness and tear strength, the connective tissue being incisable to permit selective dissection of the vessel from the anatomical structure while maintaining the integrity of the vessel wall.

2. The anatomical simulator of claim 1, wherein the vessel is pressurized by the fluid contained therein to flow from the vessel if the resilient wall is cut during surgical training.

3. The anatomical simulator of claim 2, including a fluid reservoir in fluid communication with the vessel.

4. The anatomical simulator of claim 2, wherein the vessel is pressurized to a static pressure by the force of the resilient wall.

5. The anatomical simulator of claim 1, further comprising:

a fluid reservoir containing the fluid that is connected in fluid flow communication with the vessel; and

a pump connected in fluid flow connection with the fluid reservoir for supplying a continuous flow of fluid from the fluid reservoir to the vessel for a finite period of time following cutting the wall of the vessel to simulate blood flow.

6. The anatomical simulator of claim 5, wherein the vessel defines both an inlet port and an outlet port, both the inlet port and outlet port being in fluid flow communication with the fluid reservoir, so that fluid is continuously circulated by the pump from the fluid reservoir through the vessel and back to the fluid reservoir during surgical training.

7. The anatomical simulator of claim 6, further comprising an orifice valve connected in fluid flow communication with the inlet or outlet port of the vessel to regulate the flow rate of fluid through the vessel.

8. The anatomical simulator of claim 7, wherein the orifice valve is connected between the outlet port of the vessel and the fluid reservoir, so that flow of fluid through the vessel is restricted to a first flow rate until such time that the vessel wall is cut, after which fluid is able to flow into the vessel from the fluid reservoir at a second flow rate that is greater than the first flow rate, exiting the vessel through the outlet port and a cut portion of the vessel wall.

9. An anatomical simulator for surgical training, comprising:

a synthetic liver; and

a synthetic gall bladder adhered by an incisable synthetic tissue plane having a predetermined thickness and tear strength to the synthetic liver for selective dissection therefrom while preserving the integrity of the gall bladder.

10. The anatomical simulator of claim 9, wherein the synthetic gallbladder is pressurized with a synthetic bile fluid.

11. The anatomical simulator of claim 9, further comprising rigid synthetic gallstones contained within the synthetic gallbladder.

12. The anatomical simulator of claim 9, further comprising a synthetic tissue base defining a channel, wherein the synthetic gallbladder extends into a synthetic common bile duct that is received within the channel and joined thereto by the synthetic tissue plane.

13. An anatomical simulator for surgical training, comprising:

a synthetic stomach portion extending into a synthetic esophagus portion; and

a synthetic spleen adhered by an incisable synthetic tissue plane having a predetermined thickness and tear strength to the stomach portion for selective dissection therefrom while preserving the integrity of the spleen and stomach portion.

14. The anatomical simulator of claim 13, comprising a synthetic diaphragm adhered by an incisable synthetic tissue plane to the esophagus portion for selective dissection therefrom while preserving the integrity of the esophagus.

15. The anatomical simulator of claim 13, further comprising a synthetic gastric artery adhered by an incisable synthetic tissue plane to the spleen for selective dissection therefrom while preserving the integrity of the spleen and gastric artery.

16. An anatomical simulator for surgical training, comprising:

a resilient synthetic penile portion; and

a synthetic prostate portion formed from an incisable soft tissue material and replaceably mounted to the penile portion to allow insertion of instruments through the penile portion to practice surgical procedures on the prostate portion.

17. An anatomical simulator comprising:

a plurality of synthetic anatomical structures; and

a resilient synthetic connective tissue bonding the synthetic anatomical structures together and defining a synthetic tissue plane having a predetermined thickness and tear strength, the connective tissue being incisable to permit dissection of the anatomical structures while maintaining the integrity of individual dissected anatomical structures.

18. The anatomical simulator of claim 17, wherein the resilient synthetic connective tissue is made from an elastomer having a maximum elongation and tear strength equivalent to that of a corresponding living connective tissue.

19. The anatomical simulator of claim 17, wherein the synthetic anatomical structures include a vessel having a resilient wall, further comprising a synthetic bodily fluid contained within the vessel, the fluid being pressurized so that it exudes from the vessel if the vessel wall is cut.

20. The anatomical simulator of claim 17, wherein the synthetic connective tissue is formed from an elastomeric composition comprising:

a liquid elastomer base that is curable to form a resilient elastomer; and

a jelling agent that is miscible with the liquid elastomer base, wherein the jelling agent is admixed with the liquid elastomer base in a quantity sufficient to reduce the tear strength and maximum elongation of the cured resilient elastomer by at least 50% to mimic the elongation and the strength of corresponding living anatomical connective tissue that joins living anatomical structures.