US5577993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trocar facilitator for endoscopic surgery and method of using the same
Assignee: Loma Linda University
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Filing: 1995-01-13
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Granted: 1996-11-26
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Expires: 2015-01-13
Abstract
Abstract A trocar system for assisting in the generation of endosurgical ports is disclosed in which a trocar facilitator 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 facilitator is of a corkscrew-like design, with an attached support ring and a removable guide piece having a hollow, cylindrical passageway which aids in the insertion and support of the trocar, cannula, and other endoscopic surgical instruments. In another embodiment, the facilitator is configured to aid in the introduction of carbon dioxide gas into the abdominal cavity of the patient. An improved curved tip of the blade of the trocar facilitator is also disclosed.
Inventors
- 👤 Yong H. Zhu
- 👤 Wolff M. Kirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:00
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3462; A61B17/02; A61B17/0281; A61B17/3417; A61B17/3474; A61B2017/348; A61B2017/3482; A61B2017/349
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
146 words
A trocar facilitator adapted for use with a trocar and a cannula for assisting in the establishment of a port for endoscopic surgery through the superficial tissue and peritoneum of a patient's body in said body, said facilitator comprising: a guide portion comprising first and second releasably engageable halves which form a hollow channel for slidably receiving said trocar and said cannula such that said trocar, said cannula, and said guide portion remain slidable relative to one another; and a corkscrew-like blade portion extending distally past said guide portion and removably connected to said guide portion for rotatably engaging said tissue to allow said tissue to be lifted away from vital organs of said patient and for penetrating said peritoneum of said patient, wherein said corkscrew-like blade portion forms a passageway axially aligned with said channel to allow said trocar and said cannula to pass therethrough.
Claim 2
Dependent Claim
146 words
A trocar facilitator adapted for use with a trocar and a cannula for assisting in the establishment of a port for endoscopic surgery through the superficial tissue and peritoneum of a patient's body in said body, said facilitator comprising: a guide portion comprising first and second releasably engageable halves which form a hollow channel for slidably receiving said trocar and said cannula such that said trocar, said cannula, and said guide portion remain slidable relative to one another; and a corkscrew-like blade portion extending distally past said guide portion and removably connected to said guide portion for rotatably engaging said tissue to allow said tissue to be lifted away from vital organs of said patient and for penetrating said peritoneum of said patient, wherein said corkscrew-like blade portion forms a passageway axially aligned with said channel to allow said trocar and said cannula to pass therethrough.
Claim 3
Dependent Claim
22 words
The trocar facilitator of claim 1, further comprising at least one handle on said guide portion to facilitate lifting of said tissue.
Claim 4
Dependent Claim
40 words
The trocar facilitator of claim 1, wherein said corkscrew-like blade portion terminates in a sharp tip which is angled upwardly to protect said vital organs from injury when said corkscrew-like blade portion is inserted into the body of said patient.
Claim 5
Dependent Claim
18 words
The trocar facilitator of claim 1, wherein said corkscrew-like blade portion is threadably engaged with said guide portion.
Claim 6
Dependent Claim
24 words
The trocar facilitator of claim 1, wherein said corkscrew-like blade portion includes a support ring having threads formed therein for threadably engaging said cannula.
Claim 7
Independent Claim
187 words
A method of establishing a port for endoscopic surgery through the peritoneum in a patient's body utilizing a trocar facilitator, wherein said facilitator includes a guide portion comprising first and second releasably engageable halves which form a hollow channel for slidably receiving a trocar and a cannula, said facilitator further including a corkscrew-like blade portion threadably engaged with said guide portion and extending distally past said guide portion, wherein said corkscrew-like blade portion forms a passageway axially aligned with said channel to allow said trocar and said cannula to pass therethrough, said method comprising the steps of: incising superficial tissue of said body; inserting a tip of said corkscrew-like blade portion into said incision; rotating said facilitator to thread tissue onto said corkscrew-like blade portion such that said corkscrew-like blade portion remains imbedded in said tissue and a distal end of said corkscrew-like blade portion penetrates said peritoneum of said patient; applying counter-traction to said facilitator to lift said tissue away from vital organs of said patient; and sliding said trocar and then said cannula through said guide portion and through said peritoneum to establish said port.
Claim 8
Independent Claim
187 words
A method of establishing a port for endoscopic surgery through the peritoneum in a patient's body utilizing a trocar facilitator, wherein said facilitator includes a guide portion comprising first and second releasably engageable halves which form a hollow channel for slidably receiving a trocar and a cannula, said facilitator further including a corkscrew-like blade portion threadably engaged with said guide portion and extending distally past said guide portion, wherein said corkscrew-like blade portion forms a passageway axially aligned with said channel to allow said trocar and said cannula to pass therethrough, said method comprising the steps of: incising superficial tissue of said body; inserting a tip of said corkscrew-like blade portion into said incision; rotating said facilitator to thread tissue onto said corkscrew-like blade portion such that said corkscrew-like blade portion remains imbedded in said tissue and a distal end of said corkscrew-like blade portion penetrates said peritoneum of said patient; applying counter-traction to said facilitator to lift said tissue away from vital organs of said patient; and sliding said trocar and then said cannula through said guide portion and through said peritoneum to establish said port.
Claim 9
Dependent Claim
43 words
The method of claim 6, further comprising the steps of: removing said trocar from said guide portion; and unscrewing said guide portion from said corkscrew-like blade portion and disengaging said halves of said guide portion to remove said guide portion of said facilitator.
Claim 10
Dependent Claim
46 words
The method of claim 6, wherein said tip of said corkscrew-like blade portion is angled upward and wherein said inserting step comprises: holding said facilitator such that said tip is angled downward; advancing said facilitator into said tissue; and returning the facilitator to a vertical position.
Claim 11
Dependent Claim
29 words
The method of claim 6 wherein said facilitator includes at least one handle and wherein said step of applying counter-traction comprises lifting upwardly on said at least one handle.
Claim 12
Independent Claim
222 words
A method of establishing a port for endoscopic surgery through the peritoneum in a patient's body, said port being established by use of a trocar and a cannula, said method comprising the steps of: incising superficial tissue of said body; inserting a trocar facilitator into said incision, said trocar facilitator comprising: a guide portion which forms a hollow channel for slidably receiving said trocar and said cannula such that said trocar, cannula, and guide portion remain slidable relative to one another; and a corkscrew-like blade portion extending distally past said guide portion and removably connected to said guide portion for rotatably engaging said tissue to allow said tissue to be lifted away from vital organs of said patient and for penetrating said peritoneum of said patient, wherein said corkscrew-like blade portion forms a passageway axially aligned with said channel to allow said trocar and said cannula to pass therethrough; rotating said facilitator to thread tissue onto said corkscrew-like blade portion such that said corkscrew-like blade portion remains imbedded in said tissue and a distal end of said corkscrew-like blade portion penetrates said peritoneum of said patient; applying counter-traction to said facilitator to lift said tissue away from vital organs of said patient; and sliding said trocar and then said cannula through said guide portion and through said peritoneum to establish said port.
Claim 13
Independent Claim
222 words
A method of establishing a port for endoscopic surgery through the peritoneum in a patient's body, said port being established by use of a trocar and a cannula, said method comprising the steps of: incising superficial tissue of said body; inserting a trocar facilitator into said incision, said trocar facilitator comprising: a guide portion which forms a hollow channel for slidably receiving said trocar and said cannula such that said trocar, cannula, and guide portion remain slidable relative to one another; and a corkscrew-like blade portion extending distally past said guide portion and removably connected to said guide portion for rotatably engaging said tissue to allow said tissue to be lifted away from vital organs of said patient and for penetrating said peritoneum of said patient, wherein said corkscrew-like blade portion forms a passageway axially aligned with said channel to allow said trocar and said cannula to pass therethrough; rotating said facilitator to thread tissue onto said corkscrew-like blade portion such that said corkscrew-like blade portion remains imbedded in said tissue and a distal end of said corkscrew-like blade portion penetrates said peritoneum of said patient; applying counter-traction to said facilitator to lift said tissue away from vital organs of said patient; and sliding said trocar and then said cannula through said guide portion and through said peritoneum to establish said port.
Claim 14
Dependent Claim
35 words
The method of claim 10, further comprising the steps of: removing said trocar from said guide portion; and disconnecting said guide portion from said corkscrew-like blade portion and removing said guide portion of said facilitator.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |