Method for measuring blood pressure in an animal or human using a percutaneous access port

• US 5,120,313 A
• Filed: 03/20/1990
• Issued: 06/09/1992
• Est. Priority Date: 03/28/1986
• Status: Expired due to Term

• Current Assignee: Cosmos Commodity, Inc.
• Original Assignee: Nancy W. Elftman
• Inventors: Elftman, Nancy W.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): Lewis, Ralph A.
• Application Number:
  US07/749,755
• Time in Patent Office: 812 Days
• Field of Search: 604/51, 604/52, 604/174, 604/175, 604/891.1, 128/637, 128/645, 128/672, 128/673, 128/692, 128/675, 128/748
• US Class Current: 604/175
• CPC Class Codes: A61M 2039/0267 comprising sensors or electrical contacts
• CPC Class Codes: A61M 2039/0282 with implanted tubes connected to the port
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276
• CPC Class Codes: A61M 39/0247 Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053

Abstract

A percutaneous access port for providing access to a selected organ in an animal which includes a base assembly and a septum assembly. The base assembly has a fluid chamber formed in a portion thereof generally between an upper and a lower end of the base assembly with an inlet port being formed in a portion in the base assembly gnerally near the lower end of the base assembly. The inlet port is adapted to be connected to the selected organ to provide communication between the fluid chamber in the base assembly and the selected organ. At least one access port is formed through the upper end of the base assembly with each access port extending a distance through the base assembly and intersecting the fluid chamber to provide communication between the upper end of the base assembly and the fluid chamber. The septum assembly includes a portion which extends across each access port in the base assembly to resealably seal each access port, each access port providing resealable access to the fluid chamber. A transducer is disposed in the fluid chamber of the base assembly and the transducer is adapted to detect the pressure of the fluid within the fluid chamber and to provide an output transducer signal indicative of the pressure of the fluid in the fluid chamber, the transducer providing output signal continuously providing an output indication of fluid pressure in an implanted condition of the base assembly with the transducer connected thereto.

Claims

1. A method for monitoring blood pressure in a human or an animal, comprising the steps of:

implanting in the human or animal a portion of a percutaneous access port, wherein said portion of the percutaneous access port is implanted into a selected body organ in the human or animal, comprising;

a base assembly having an upper end, a lower end, and an outer peripheral surface;

a fluid chamber formed within a portion of the base assembly;

a transducer disposed within a portion of the upper end of the base assembly in fluidic communication with the fluid chamber;

an inlet port formed in a portion of the lower end of the base assembly in communication with the fluid chamber and connectable to the selected body organ;

wherein the inlet port and at least a portion of the lower end of the base assembly is percutaneously implanted in the selected body organ of the human or animal;

connecting the selected body organ of the human or animal capable of indicating blood pressure having fluid flowing therethrough to the inlet port of the percutaneous access port so that fluid contained in the selected body organ is in communication with the fluid chamber in the percutaneous access port, the transducer sensing pressure of the fluid in the fluid chamber of the percutaneous access port wherein the fluid is from the selected body organ and outputing signals indicative of the pressure of the fluid in the fluid chamber of the percutaneous access port;

wherein the fluid chamber and the transducer are not disposed in the selected body organ of the human or animal; and

measuring the blood pressure from the transducer which senses the pressure of the fluid in the fluid chamber of the percutaneous access port.

2. The method of claim 1 wherein the selected body organ comprises a portion of the cardiovascular system.