System for distending body tissue cavities by continuous flow irrigation
First Claim
1. A system for distending body tissue cavities of subjects by continuous flow irrigation during endoscopic procedures the said system comprising:
- a fluid source reservoir containing a non viscous physiologic fluid meant for cavity distension;
a fluid supply conduit tube connecting the fluid source reservoir to an inlet port of a variable speed positive displacement inflow pump and an outlet port of the said inflow pump being connectable to an inflow port of an endoscope instrument through an inflow tube for pumping the fluid at a controlled flow rate into the cavity, the flow rate of the said inflow pump being termed as the inflow rate;
an inflow pressure transducer being located anywhere in the inflow tube between the outlet port of the inflow pump and the inflow port of the endoscope;
an outflow port of the endoscope being connectable to an inlet port of a variable speed positive displacement outflow pump through a outflow tube for removing the fluid from the cavity at a controlled flow rate, the flow rate of the said outflow pump being termed as the outflow rate, an outlet port of the outflow pump being connected to a waste fluid collecting container, and characterized in that a housing tube having a controllable constriction site is being provided between the fluid source reservoir and the inflow tube such that the same by-passes the inflow pump;
wherein housing tube provides a route for any excess fluid being pumped by the inflow pump to bypass the inflow pump and go back to the fluid supply tube or the fluid source reservoir.
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Abstract
The present invention provides a system and a method for distending a body tissue cavity of a subject by continuous flow irrigation such that minimal or negligible fluid turbulence is present inside the cavity, such that any desired cavity pressure can be created and maintained for any desired outflow rate. The present invention also provides a method for accurately determining the rate of fluid loss, into the subject'"'"'s body system, during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation or flow rate sensor. The system and the methods of the present invention described above can be used in any endoscopic procedure requiring continuous flow irrigation few examples of such endoscopic procedures being hysteroscopic surgery, arthroscopic surgery, trans uretheral surgery, endoscopic surgery of the brain and endoscopic surgery of the spine.
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Citations
4 Claims
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1. A system for distending body tissue cavities of subjects by continuous flow irrigation during endoscopic procedures the said system comprising:
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a fluid source reservoir containing a non viscous physiologic fluid meant for cavity distension;
a fluid supply conduit tube connecting the fluid source reservoir to an inlet port of a variable speed positive displacement inflow pump and an outlet port of the said inflow pump being connectable to an inflow port of an endoscope instrument through an inflow tube for pumping the fluid at a controlled flow rate into the cavity, the flow rate of the said inflow pump being termed as the inflow rate;
an inflow pressure transducer being located anywhere in the inflow tube between the outlet port of the inflow pump and the inflow port of the endoscope;
an outflow port of the endoscope being connectable to an inlet port of a variable speed positive displacement outflow pump through a outflow tube for removing the fluid from the cavity at a controlled flow rate, the flow rate of the said outflow pump being termed as the outflow rate, an outlet port of the outflow pump being connected to a waste fluid collecting container, and characterized in that a housing tube having a controllable constriction site is being provided between the fluid source reservoir and the inflow tube such that the same by-passes the inflow pump;
wherein housing tube provides a route for any excess fluid being pumped by the inflow pump to bypass the inflow pump and go back to the fluid supply tube or the fluid source reservoir. - View Dependent Claims (2, 3)
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4-25. -25. (canceled)
Specification