Jason J Porter

US Patent:

6588432, Jul 8, 2003

Filed:

Feb 15, 2001

Appl. No.:

09/784289

Inventors:

Carey D. Rehder - Woodbury MN
Jason P. Porter - Mound MN
Deron J. Singer - Burnsville MN

Assignee:

PMT Corporation - Chanhassen MN

International Classification:

A61B 1900

US Classification:

128899, 128898, 623 8

Abstract:

A magnetic injection port assembly for a tissue expander system or similar inflatable medical device. The injection port assembly includes an injection port body having a cavity, a needle guard assembly, and a magnetic material therein. The needle guard assembly is positioned to prevent a hypodermic needle from passing through the medical device or interfering with the magnetic material. The magnetic material is affixed to the injection port body outside the cavity and the needle guard assembly. The magnetic material is spatially aligned with the region of the body into which the needle should be inserted so that this region may be located by locating the magnet with an external, non-invasive magnetic detection device.

US Patent:

6755199, Jun 29, 2004

Filed:

Feb 15, 2001

Appl. No.:

09/784582

Inventors:

Carey D. Rehder - Woodbury MN
Jason P. Porter - Mound MN
Deron J. Singer - Burnsville MN

Assignee:

PMT Corporation - Chanhassen MN

International Classification:

A61B 1900

US Classification:

128899, 128898

Abstract:

A sensing probe assembly and method for locating a magnetic field emitted by an implanted medical device. The assembly has a housing containing a magnetic field sensor circuit having an indicator light and a magnetic switch. The assembly further has a structure for marking the location of the magnetic field. The method utilizes a marking system whereby at least four points forming at least two perpendicularly intersecting line segments are located and marked above the magnetic field. The intersection is then used as a reference point for performing a medical procedure on the implanted medical device.