Method of making a hand access laparoscopic device
View Patent ↗The invention relates to a hand access laparoscopy device having a gelcap, a retainer, a sleeve and a retention ring. The gelcap includes gel that is bonded to a cap. The cap includes an inner cylindrical wall to which the gel in bonded, thereby providing a sealing area between the device and the wound in a body wall. By securing the gel to the inner cylindrical wall, the thickness of the gel and corresponding cap is minimized along with the overall footprint of the device. With the gel thickness reduced and able to be substantially flush, the “doming” phenomenon produced by insufflation of a patient's abdomen is reduced.
1. A method of making a gelcap, comprising:
providing a cap having a wall comprising a plurality of apertures, wherein the wall defines an opening through the cap;
providing a casting mold having a mold cavity;
providing an oil;
providing a triblock copolymer;
mixing the oil and the triblock copolymer to form a slurry;
degassing the slurry;
filling the mold cavity with slurry;
heating the slurry and the mold until the slurry attains a temperature within a range between about 130° C. and about 250° C. and maintaining the mold and slurry within the range until the slurry transforms into gel;
cooling the gel to about ambient room temperature; and
removing the cured gel from the mold.
2. The method of claim 1 , the providing an oil including providing mineral oil.
3. The method of claim 1 , the degassing step including stirring the slurry while degassing the slurry.
4. The method of claim 1 , further comprising degassing the slurry while the slurry is in the mold.
5. The method of claim 1 , further comprising preheating the slurry prior to filling the mold cavity with slurry.
6. The method of claim 1 , the cooling step including immersing the gel in water.
7. The method of claim 1 , the cooling step including air cooling the gel.
8. The method of claim 1 , further comprising inserting a plurality of gas-filled balloons into the slurry in the mold cavity.
9. The method of claim 8 , the inserting step including inserting the balloons into the slurry substantially around the center of the mold cavity.
10. The method of claim 8 , the inserting step including dispersing the balloons in the slurry randomly about the mold cavity throughout the region beyond the center of the mold cavity.
11. The method of claim 1 , further comprising:
inserting a plurality of solid objects into the slurry in the mold cavity; and
removing the plurality of solid objects after the gel is cured.
12. The method of claim 11 , the inserting step including inserting at least one sphere into the slurry around the center of the mold cavity.
13. The method of claim 11 , the inserting step including inserting the solid objects in the slurry substantially around the center of the mold cavity.
14. The method of claim 11 , the inserting step including, dispersing the solid objects in the slurry randomly about the mold cavity throughout the region beyond the center of the mold cavity.
15. The method of claim 1 , further comprising sterilizing the gelcap with gamma sterilization.
16. The method of claim 1 , further comprising mixing the slurry in a centrifuge while heating the slurry and the mold.
17. The method of claim 1 , further comprising coupling the gel to the cap.
18. The method of claim 17 , the coupling step including bonding the gel to the cap with an adhesive.
19. The method of claim 17 , the providing a cap step including providing a cap made of a plastic material.
20. The method of claim 19 , the coupling step including:
applying a solvent to the gel to melt polystyrene in the gel;
applying a solvent to the cap to melt the plastic of the cap; and
placing the gel in contact with the cap to allow a bond to form between the gel and the cap.
21. The method of claim 17 , wherein:
the providing a cap having a wall step including providing a cap having an inner wall, the cap being made of a polymeric material; and
the coupling step including coupling the cured gel to the inner wall of the cap.
22. The method of claim 21 , the providing a casting mold step including providing a mold configured to produce a gel slug having a smaller periphery than the inner wall of the cap and a height higher than a height of the inner wall of the cap.
23. The method of claim 22 , further comprising placing the gel slug within the inner wall of the cap.
24. The method of claim 23 , the coupling step including compression molding the gel slug to the inner wall of the cap.
25. The method of claim 23 , the coupling step including heating the gel slug and the cap to a temperature sufficient for polystyrene of the gel and the polymer of the cap to form bonds.
26. The method of claim 1 , further comprising:
placing the cap into the mold cavity,
wherein the filling step including filling the mold cavity having the cap with slurry such that the slurry is in contact with the cap,
the heating step including heating the slurry, the cap and the mold until the slurry transforms into gel, the gel being coupled to the cap, thereby forming a gelcap,
the cooling step including cooling the gelcap, and
the removing step including removing the gelcap from the mold.
27. The method of claim 26 , wherein:
the providing a cap step including providing a cap including styrene-ethylene/butylene-styrene; and
the heating step including heating the slurry, cap and mold to above about 130° C. and maintaining the temperature above about 130° C. until a bond is formed between the cap and gel.
28. The method of claim 26 , wherein:
the providing a cap step including providing a cap including polycarbonate; and
the heating step including heating the slurry, cap and mold to about 150° C. and maintaining that temperature until a bond is formed between the cap and gel.
29. A method of making a gelcap, comprising:
providing a cap having an opening;
providing a casting mold having a mold cavity;
providing mineral oil;
providing a triblock copolymer;
mixing the mineral oil and the triblock copolymer to form a slurry;
degassing the slurry in a vacuum chamber by stirring the slurry and applying a vacuum of about one atmosphere to the slurry;
preheating the slurry prior to filling the mold cavity with slurry;
filling the mold cavity with slurry;
heating the slurry and the mold until the slurry attains a temperature within a range between about 130° C. and about 250° C. and maintaining the mold and slurry within the range until the slurry transforms into gel;
degassing the slurry further while the slurry is in the mold;
cooling the gel to about ambient room temperature;
removing the cured gel from the mold; and
coupling the gel to the cap, thereby forming the gelcap.
30. The method of claim 29 , the coupling step including bonding the gel to the cap with an adhesive.
31. The method of claim 29 , wherein:
the providing a cap step including providing a cap made of a plastic material; and
the coupling step including applying a solvent to the gel to melt polystyrene in the gel, applying a solvent to the cap to melt the plastic of the cap, and placing the gel in contact with the cap to allow a bond to form between the gel and the cap.
32. The method of claim 29 , wherein:
the providing a cap step including providing a cap having an inner wall, the opening of the cap being defined by the inner wall, the cap being made of a polymeric material;
the providing a casting mold step including providing a mold configured to produce a gel slug having a smaller periphery than the inner wall of the cap and a height higher than the height of the inner wall of the cap; and
the coupling step including coupling the cured gel to the inner wall of the cap.
33. The method of claim 32 , further comprising placing the gel slug within the inner wall of the cap.
34. The method of claim 33 , the coupling step including compression molding the gel slug to the inner wall of the cap.
35. The method of claim 33 , the coupling step including heating the gel slug and the cap to a temperature sufficient for polystyrene of the gel and the polymer of the cap to form bonds.
36. A method of making a gelcap, comprising:
providing a cap having an opening therethrough;
providing a casting mold having a mold cavity;
providing mineral oil;
providing a triblock copolymer;
mixing the mineral oil and the triblock copolymer to form a slurry;
degassing the slurry in a vacuum chamber by stirring the slurry and applying a vacuum of about one atmosphere to the slurry;
preheating the slurry prior to filling the mold cavity with slurry;
placing the cap into the mold cavity;
filling the mold cavity having the cap with slurry such that the slurry is in contact with the cap;
heating the slurry, the cap, and the mold until the slurry attains a temperature within a range between about 130° C. and about 250° C. and maintaining the mold and slurry within the range until the slurry transforms into gel, the gel being coupled to the cap and forming a gelcap;
degassing the slurry further while the slurry and the cap are in the mold;
cooling the gelcap to about ambient room temperature; and
removing the gelcap from the mold.
37. The method of claim 36 , wherein:
the providing a cap step including providing a cap including styrene-ethylene/butylene-styrene; and
the heating step including heating the slurry, cap and mold to above about 130° C. and maintaining the temperature above about 130° C. until a bond is formed between the cap and gel.
38. The method of claim 36 , wherein:
the providing a cap step including providing a cap including polycarbonate; and
the heating step including heating the slurry, cap and mold to about 150° C. and maintaining that temperature until a bond is formed between the cap and gel.
39. The method of claim 1 , the degassing step including applying a vacuum of about one atmosphere to the slurry.