Pressure sensing syringe
First Claim
Patent Images
1. A pressure sensing syringe, said syringe having a syringe barrel having an open end and a closed end with an aperture therethrough, syringe piston, and pressure responsive member located in said syringe barrel capable of indicating the change of pressure of a fluid in said syringe during the injection of said fluid into a patient, said syringe comprising:
- a syringe barrel having a portion thereof being translucent to observe the interior of the syringe barrel;
a syringe piston sealingly slidingly engaging the interior of the syringe barrel; and
a pressure responsive member located in the syringe barrel in the portion of the syringe barrel between the syringe piston and the closed end of the syringe barrel, the pressure responsive member including;
a compressible material including open cell foam having a plurality of open cells therein, and an impermeable coating on the compressible material to prevent said fluid from permeating the compressible material or being absorbed by the compressible material, the compressible material being visible through the translucent portion of the syringe barrel for indicating said change of pressure of said fluid in the syringe barrel during said injection of said fluid wherein the compressible material is retained within said syringe barrel by said syringe piston.
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Accused Products
Abstract
A pressure sensing syringe comprising a syringe barrel, a syringe piston and a compressible material.
66 Citations
6 Claims
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1. A pressure sensing syringe, said syringe having a syringe barrel having an open end and a closed end with an aperture therethrough, syringe piston, and pressure responsive member located in said syringe barrel capable of indicating the change of pressure of a fluid in said syringe during the injection of said fluid into a patient, said syringe comprising:
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a syringe barrel having a portion thereof being translucent to observe the interior of the syringe barrel; a syringe piston sealingly slidingly engaging the interior of the syringe barrel; and a pressure responsive member located in the syringe barrel in the portion of the syringe barrel between the syringe piston and the closed end of the syringe barrel, the pressure responsive member including; a compressible material including open cell foam having a plurality of open cells therein, and an impermeable coating on the compressible material to prevent said fluid from permeating the compressible material or being absorbed by the compressible material, the compressible material being visible through the translucent portion of the syringe barrel for indicating said change of pressure of said fluid in the syringe barrel during said injection of said fluid wherein the compressible material is retained within said syringe barrel by said syringe piston. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification