Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-09-12
1997-05-20
Millin, Vincent
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604158, 604264, A61M 5178
Patent
active
056308051
ABSTRACT:
A method for accessing the peritoneal cavity without using a trocar. A cannula is provided having screw threads on its outer surface, a distal end, a proximal end, a body portion between the distal and proximal ends, a centrally positioned lumen extending throughout the length of the cannula and a hook. A small incision is made in the skin and underlying tissues down to the anterior fascia and a smaller opening is made in the anterior fascia to receive the hook. The hook is inserted through the opening in the anterior fascia and the proximal end of the cannula is rotated in the same direction in which the point of the hook is directed so that the cannula stretches the opening in the anterior fascia enough to accommodate the body portion of the cannula while maintaining an airtight seal around the body portion of the cannula. During rotation, the body portion of the cannula passes through the layers of the abdominal wall until the distal end of the cannula is disposed within the peritoneal cavity. A laparoscopy needle may be used to pierce the anterior fascia and the peritoneal cavity insufflated with distending gas before withdrawal of the needle and insertion of the cannula.
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Millin Vincent
Rodriguez Cris
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