Catheter, a balloon catheter and a method and apparatus for monitoring the transverse cross-section of a stoma
First Claim
1. A balloon catheter comprising:
- an elongated catheter extending between a proximal end and a distal end,an inflatable element defining a hollow interior region located on the catheter,a first lumen extending along the catheter from the proximal end to the inflatable element communicating with the inflatable element for accommodating an inflating medium to the inflatable element,a non-deformable elongated tubular protective housing having a chamber formed therein located within a cavity formed in the catheter adjacent the inflatable element, the cavity in the catheter communicating with the hollow interior region of the inflatable element, the protective housing terminating at one end in a communicating opening, the communicating opening communicating the chamber of the protective housing with the hollow interior region of the inflatable element,a pressure sensing element located in the chamber of the protective housing and being free floating therein and communicating with the hollow interior region of the inflatable element through the communicating opening in the protective housing and the cavity in the catheter for sensing pressure of an inflating medium in the inflatable element.
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Accused Products
Abstract
A balloon catheter comprises a catheter and a balloon located on the distal end of the catheter. A pair of stimulating electrodes for receiving a constant current stimulating signal when the balloon is inflated with an electrically conductive medium and a plurality of sensing electrodes for producing voltage response signals are located on the catheter. The voltage response signals are indicative of the values of the transverse cross-sectional area of the balloon adjacent the sensing electrodes. A first lumen accommodates the inflating medium to and from the balloon, and a second lumen accommodates electrically conductive wires to the stimulating and sensing electrodes. A pressure sensing element is located in a protective housing in the second lumen, and communicates through a communicating opening in the protective housing and through a communicating port in the catheter with a hollow interior region of the balloon. The balloon catheter may also be provided with a guide wire engaging element for engaging a guide wire externally of the balloon catheter.
25 Citations
16 Claims
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1. A balloon catheter comprising:
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an elongated catheter extending between a proximal end and a distal end, an inflatable element defining a hollow interior region located on the catheter, a first lumen extending along the catheter from the proximal end to the inflatable element communicating with the inflatable element for accommodating an inflating medium to the inflatable element, a non-deformable elongated tubular protective housing having a chamber formed therein located within a cavity formed in the catheter adjacent the inflatable element, the cavity in the catheter communicating with the hollow interior region of the inflatable element, the protective housing terminating at one end in a communicating opening, the communicating opening communicating the chamber of the protective housing with the hollow interior region of the inflatable element, a pressure sensing element located in the chamber of the protective housing and being free floating therein and communicating with the hollow interior region of the inflatable element through the communicating opening in the protective housing and the cavity in the catheter for sensing pressure of an inflating medium in the inflatable element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification