Catheter for monitoring pressure
A catheter insertable into a patient for monitoring pressure having an expandable outer balloon. An expandable inner balloon is positioned within the lumen of the catheter and has having a second outer wall and forms a gas chamber to monitor pressure within the patient. In response to pressure exerted on the outer wall of the outer balloon, fluid within the outer balloon enters an opening in the wall of the catheter lumen to exert a pressure on the outer wall of the expanded inner balloon to deform the inner balloon and compress the gas within the inner balloon. A pressure sensor communicates with the gas containing chamber for measuring pressure based on compression of gas caused by deformation of the expanded inner balloon resulting from deformation of the expanded outer balloon.
1 . A catheter insertable into a patient comprising:
a first lumen;
a second lumen independent of the first lumen;
an expandable pressure balloon in fluid communication the second lumen;
a pressure sensor positioned within the pressure balloon for measuring pressure within a bladder of the patient;
an expandable stabilizing balloon positioned proximal of a distalmost end of the catheter and proximal of the pressure balloon, the stabilizing balloon communicating with the first lumen for expansion from a first configuration to a second expanded configuration to stabilize a position of the catheter, the stabilizing balloon expanding radially outwardly with respect to the catheter; and
an oxygen sensor measuring oxygen levels in urethral tissue, wherein an entirety of the oxygen sensor is positioned proximal of the stabilizing balloon and the expandable pressure balloon and adapted for positioning in a urethra of the patient.
2 . The catheter of claim 1 , further comprising a drainage lumen drainage of the bladder, the drainage lumen independent of the first lumen.
3 . The catheter of claim 2 , further comprising a side opening in a wall of the catheter in communication with the drainage lumen, the side opening positioned distal of the stabilizing balloon and distal of the oxygen sensor.
4 . The catheter of claim 1 , wherein the catheter includes a temperature sensor positioned within another lumen of the catheter to measure core body temperature.
5 . The catheter of claim 1 , wherein the catheter is configured for insertion into the bladder.
6 . The catheter of claim 1 , further comprising a drainage lumen and a side opening in a wall of the catheter communicating with the drainage lumen.
7 . A catheter insertable into a patient comprising:
a first lumen;
first pressure balloon positioned at a distal region of the catheter, the first balloon communicating with the first lumen for expansion from a first configuration to a second expanded configuration, the balloon expanding radially outwardly with respect to the catheter,
a pressure sensor positioned within the first balloon, wherein pressure is measured based on compression of gas caused by deformation of the expanded balloon; and
an oxygen sensor measuring oxygen levels in urethral tissue, wherein an entirety of the oxygen sensor is positioned proximal of the pressure balloon and adapted for positioning in a urethra of the patient.
8 . The catheter of claim 7 , further comprising a drainage lumen communicating with a body cavity to remove fluid from the body cavity, the drainage lumen independent of the first lumen.
9 . The catheter of claim 7 , wherein the catheter includes a temperature sensor positioned within another lumen of the catheter to measure core body temperature.
10 . The catheter of claim 7 , wherein the catheter is configured for insertion into a bladder of the patient.
11 . The catheter of claim 9 , further comprising a drainage lumen and a side opening in a wall of the catheter communicating with the drainage lumen.
12 . The catheter of claim 1 , wherein the pressure balloon is partially inflated during use.
13 . The catheter of claim 7 , wherein pressure balloon is partially inflated during use.
14 . The catheter of claim 1 , wherein the stabilizing balloon has a greater cross-sectional dimension than the pressure balloon.
15 . The catheter of claim 14 , wherein the pressure balloon has a different configuration than the stabilizing balloon.
16 . The catheter of claim 1 , wherein the pressure as a different configuration than the stabilizing balloon.
17 . The catheter of claim 11 , wherein the oxygen sensor is positioned proximal of the side opening.