1
Bryan E Loomas, John P Lunsford, Edwin J Hlavka: Gas-tight seal accommodating surgical instruments with a wide range of diameters. Origin Medsystems, Ian Limbach & Limbach Hardcastle, May 2, 1995: US05411483 (210 worldwide citation)

A seal for use in a surgical instrument to provide a gas-tight seal with an instrument passed through the seal. The seal can form a gas-tight seal with an instrument having a diameter within a wide range of diameters. The seal comprises a seal body, an instrument seal, and a laterally-compliant seal ...


2
John T To, Charles Gresl, John P Lunsford, John Davis, Tim J Kovac, Thomas Kramer: Reusable cannula with disposable seal. Applied Medical Resources Corporation, Richard L Myers, September 26, 2000: US06123689 (175 worldwide citation)

A disposable seal assembly for use with a reusable cannula preferably includes a flapper valve fluid seal and at least one instrument seal. The instrument seal has a sacrificial flange and a sealing flange that protrude from an inner baffle connected to the assembly's main body by a flexible outer b ...


3
Peter Callas, John P Lunsford, Albert K Chin, Michael Wei: Endoscopic surgical access port and method. Origin Medsystems, Fenwick & West, October 2, 2007: US07276075 (140 worldwide citation)

A sliding gas-tight seal on an access port promotes insufflation of an anatomical space formed in tissue at a surgical site only during insertion of an endoscopic instrument through the access port into the anatomical space, and promotes deflation of the inflated space upon removal of the endoscopic ...


4
Albert K Chin, John P Lunsford: Endoscopic inflatable retraction devices for separating layers of tissue. Origin Medsystems, Ian Hardcastle, Limbach & Limbach, November 21, 1995: US05468248 (121 worldwide citation)

A system for separating a first layer of tissue from a second layer of tissue and for maintaining separation of the first layer of tissue from the second layer of tissue while providing access to at least one of the layers of tissue. The system comprises a main envelope which defines a main inflatab ...


5
Peter Callas, John P Lunsford, Albert K Chin, Michael Wei: Endoscopic surgical access port and method. Origin Medsystems, Fenwick & West, November 2, 2004: US06811546 (106 worldwide citation)

A sliding gas-tight seal on an access port promotes insufflation of an anatomical space formed in tissue at a surgical site only during insertion of an endoscopic instrument through the access port into the anatomical space, and promotes deflation of the inflated space upon removal of the endoscopic ...


6
John P Lunsford, Charles Gresl, Jeffrey A Smith, Daniel T Wallace, Albert K Chin: Method and inflatable chamber apparatus for separating layers of tissue. Origin Medsystems, Limbach & Limbach L, July 14, 1998: US05779728 (92 worldwide citation)

An apparatus for tissue dissection and instrument anchoring, including a dissection balloon having a viewing window (preferably a rigid, transparent window) at its distal end, or including an anchoring or dissection balloon having nonuniform elasticity selected to achieve desired inflated shape and ...


7
John P Lunsford, Edwin J Hlavka, Edmund J Roschak, Daniel T Wallace, Charles Gresl Jr, David B McCallum, Dana G Mead: Flexible lifting apparatus. Origin Medsystems, Limbach & Limbach L, October 28, 1997: US05681341 (82 worldwide citation)

A lifting apparatus for deployment through a laparoscopic incision in a body wall to apply an external lifting force over a large area of the body wall. The apparatus provides a broad lifting surface that is capable of applying a lifting force of at least 40 pounds (180 Newtons) to an area of a body ...


8
John P Lunsford, Michael C Stewart: Electrocautery surgical scissors. Origin Medsystems, Fenwick & West, March 18, 2008: US07344536 (82 worldwide citation)

Surgical apparatus includes bipolar electrodes and tissue-shearing blades configured to electrically contact tissue for electrocauterization thereof prior to shearing contact of the cutting blades with the tissue over wide angles of presentation of the tissue to the electrodes and blades. Extensions ...


9
John P Lunsford, Michael C Stewart: Electrocautery scissors. Origin Medsystems, Fenwick & West, June 15, 2004: US06749609 (79 worldwide citation)

Surgical apparatus includes bipolar electrodes and tissue-shearing blades configured to electrically contact tissue for electrocauterization thereof prior to shearing contact of the cutting blades with the tissue over wide angles of presentation of the tissue to the electrodes and blades. Extensions ...


10
Albert K Chin, John P Lunsford, Tenny Chang, Jeffrey W Baxter: Cannula-based irrigation system and method. Origin Medsystems, Fenwick & West, January 23, 2001: US06176825 (68 worldwide citation)

A retractor and a surgical tool are positioned within a cannula, and a dissection cradle of the retractor is positioned at the distal end of the cannula. The retractor includes a first portion with an axis approximately parallel to the axis of the cannula and a second portion with an axis skewed rel ...