Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1994-03-14
1995-08-22
Thaler, Michael H.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
606185, A61B 1734
Patent
active
054434840
ABSTRACT:
A trocar system for assisting in the generation of ports for endoscopic surgery is disclosed in which a retractor is used to place the peritoneum in counter-traction to facilitate the penetration of the trocar. Peritoneal counter-traction results in increased surface tension which reduces the force and downward momentum necessary to achieve trocar penetration, thereby eliminating the risk of excess penetration and injury to internal organs. The retractor can taken on a variety of configurations, such as a half-cylinder design in which a distal blade is inserted beneath the deeper fascial tissues and rotated into position for releasable connection and articulation with a similar half-cylinder. The two retractor halves are then joined to form a combined guide and retractor to receive the trocar for countertraction and penetration. In another embodiment, the retractor is of an integral cylindrical design with lateral distal hooks for gripping the fascial tissues obliquely. In this embodiment, the gripping is so superior that several such retractors can be used to elevate the tissues of the patient without the need for pneumoperitoneum. An improved conical trocar tip is also disclosed.
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Kirsch Wolff M.
Zhu Yong H.
Loma Linda University Medical Center
Thaler Michael H.
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