Tonometric catheter combination

• US 5,174,290 A
• Filed: 06/20/1991
• Issued: 12/29/1992
• Est. Priority Date: 03/22/1982
• Status: Expired due to Term

• Current Assignee: Instrumentarium Dental Incorporated (Envista Holdings Corporation)
• Original Assignee: Mountpelier Investments, S.A.
• Inventors: Fiddian-Green, Richard G.
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): Lacyk, John P.
• Application Number:
  US07/719,098
• Time in Patent Office: 558 Days
• Field of Search: 128/632, 128/635, 128/691, 128/672, 128/673, 128/736, 128/748, 128/749, 128/774, 128/778, 128/780, 128/782, 204/407, 204/415, 204/433
• US Class Current: 600/364
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/1459 invasive, e.g. introduced into the body by a catheter A61B5/1464 takes precedence
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence
• CPC Class Codes: A61B 5/6853 with a balloon
• CPC Class Codes: A61M 2025/0177 having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
• CPC Class Codes: A61M 2025/1061 having separate inflations tubes, e.g. coaxial tubes or tubes otherwise arranged apart from the catheter tube
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters

Abstract

A tonometric device for use in hollow viscus tonometry and remote sensing of patient fluid parameters is disclosed. The device is capable of monitoring certain critical fluid properties of interest, such as oxygen gases and carbon dioxide gases in the wall tissue itself of the patient'"'"'s organ, rather than monitoring such properties in a lumen of the organ. A walled sampling chamber, which is preferably an inflated balloon member, is provided on an elongated tube, with provisions for positioning the sampling chamber in direct contact with a wall portion of the patient'"'"'s internal organ.

Claims

1. A combination tonometric catheter and urinary catheter apparatus for measuring a liquid fluid or gaseous fluid property indicative of the condition of an internal organ of a human or other mammal in vivo, comprising:

(a) an elongated tube having a first lumen extending longitudinally therethrough, a portion of said tube being composed of a first elastomeric material that is substantially impermeable to one or more liquid fluids or gaseous fluids of interest, said fluids of interest including oxygen gases and carbon dioxide gases;

(b) at least one walled sampling chamber on said tube in fluid communication with the interior of said first lumen, the wall of said sampling chamber being composed of a second elastomeric material that is freely and selectively permeable to said one or more liquid fluids or gaseous fluids of interest, said second material being substantially impermeable to other liquid fluids or gaseous fluids;

(c) means for positioning said walled sampling chamber substantially in direct contact with a wall portion of said internal organ in order to allow at least one of said liquid fluids or gaseous fluids of interest from the tissue of the wall portion of the internal organ to permeate said walled sampling chamber; and

(d) a second lumen extending longitudinally through said tube and being adapted for the delivery or draining of a fluid to or from the internal organ.

2. An apparatus according to claim 1, wherein said walled sampling chamber is defined by a balloon member composed of said second material generally surrounding a portion of said tube and sealingly interconnected therewith, said balloon member being inflated for forming an interior space between said balloon member and said tube and for selectively positioning a portion of said balloon member substantially in direct contact with a wall portion of the internal organ.

3. An apparatus according to claim 1, wherein said second lumen extends longitudinally to a distal location in the internal organ beyond that of said first lumen and beyond that of said walled sampling chamber in order to be longitudinally spaced therefrom, said second lumen including means at its longitudinally distal end for providing fluid communication between the internal organ and the interior of said second lumen.

4. An apparatus according to claim 1, wherein said walled sampling chamber is resiliently inflated.