Andrew Branch Dr Freeman

US Patent:

50840169, Jan 28, 1992

Filed:

Oct 23, 1990

Appl. No.:

7/602165

Inventors:

Andrew B. Freeman - Dallas TX
H. A. Tillmann Hein - Dallas TX

International Classification:

A61M 2500

US Classification:

604103

Abstract:

A dual lumen catheter member having distal and proximal end portions is configured to be longitudinally passed entirely through a hollow needle member insertable into the epidural space of a patient, and is provided on its distal end with an inflatable balloon element. With the needle member inserted, the distal catheter end is passed therethrough into the epidural space. The needle member is then withdrawn and removed from the catheter member past its proximal end. The proximal end of the catheter member is then removably inserted into an inlet fitting and frictionally locked therein. The installed inlet fitting defines sealingly separated outward extensions of the lumen inlets which are spaced longitudinally apart on the proximal catheter end portion. Pressurized fluid is injected into one of these inlet extensions to inflate the balloon element, and an anesthetic fluid is flowed into the other extension, and through its associated lumen, into the epidural space through the distal catheter end therein. The inflated balloon element prevents dislodgement of the distal catheter end from the epidural space and also inhibits its migration therein into, for example, adjacent blood vessels, the subarachnoid space, or out a nerve root sleeve.

US Patent:

50246550, Jun 18, 1991

Filed:

Sep 5, 1989

Appl. No.:

7/403107

Inventors:

Andrew B. Freeman - Dallas TX
H. A. Tillmann Hein - Dallas TX

International Classification:

A61M 2500

US Classification:

604 53

Abstract:

A dual lumen catheter member having distal and proximal end portions is configured to be longitudinally passed entirely through a hollow needle member insertable into the epidural space of a patient, and is provided on its distal end with an inflatable balloon element. With the needle member inserted, the distal catheter end is passed therethrough into the epidural space. The needle member is then withdrawn and removed from the catheter member past its proximal end. The proximal end of the catheter member is then removably inserted into an inlet fitting and frictionally locked therein. The installed inlet fitting defines sealingly separated outward extensions of the lumen inlets which are spaced longitudinally apart on the proximal catheter end portion. Pressurized fluid is injected into one of these inlet extensions to inflate the balloon element, and an anesthetic fluid is flowed into the other extension, and through its associated lumen, into the epidural space through the distal catheter end therein. The inflated balloon element prevents dislodgement of the distal catheter end from the epidural space and also inhibits its migration therein into, for example, adjacent blood vessels, the subarachnoid space, or out a nerve root sleeve.

Address:

5008 Sea Pne Dr, Dallas, TX 75287

Phone:

9722488982

VIN:

JTDKB20U377596174

Make:

TOYOTA

Model:

PRIUS

Year:

2007