Intracranial ventricular catheter assembly

Claim 1

An intracranial ventricular catheter assembly for determining cranial ventricular pressure, for introducing a sterile isolated fluid into a cranium ventricle and for withdrawing cerebrospinal fluid from a cranium ventricle, said catheter assembly comprising: an elongate elastomeric catheter body having a proximal end, a distal end, an outer wall surface, a first passageway extending from a location distal of said proximal end to said distal end of said catheter body and opening onto said distal end, and a second passageway extending from the proximal end of said catheter body to a port at said distal end of said catheter body opening onto said outer wall surface; a connector at said proximal end of said catheter body in fluid communication with said second passageway for providing a connection to a pressure transducer or for providing a withdrawal port; a stopcock mechanism in fluid communication with said first passageway for allowing or preventing fluid flow of the sterile isolated fluid; inflatable means permanently mounted at the distal end of said catheter body and communicating only with said open end of said first passageway for receiving and containing sterile isolated fluid introduced into said first open passageway through said stopcock mechanism; and said port being in fluid communication with said second passageway adjacent the distal end of said catheter body and in fluid communication with a cranium ventricle for communicating cranial vetricular pressure to a pressure transducer or for withdrawing cerebrospinal fluid.

Claim 3

A method for utilizing an intracranial ventricular catheter assembly comprising a catheter body having a proximal end and a distal end, a connector located at said proximal end of said catheter body, inflatable means mounted at said distal end of said cathether body, a stopcock mechanism mounted along said catheter body at a position distal to said proximal connector, said catheter body having at least one port in the sidewall thereof at a position just proximal to said inflatable means, said catheter body having a first passageway extending from said stopcock mechanism to an interior space of said inflatable means, and said catheter body having a second passageway extending from said port to and through said proximal connector, said method comprising the steps of: (a) connecting pressure sensing means to the proximal connector of said catheter assembly; (b) connecting a syringe having up to 5.0 cc saline therein to the stopcock mechanism by means of a syringe adapter mounted on said stopcock mechanism; (c) forming a drill hole in a skull; (d) appropriately positioning through the drill hole and within the ventricular system of the brain the distal end of the catheter assembly; (e) reading the intracranial pressure; (f) inflating the inflatable means up to 5.0 cc by the addition of 0.5 cc aliquots of saline from the syringe; (g) manipulating said stopcock mechanism to lock said inflatable means in an inflated condition; (h) monitoring the increase of intracranial pressure produced by inflation of the inflatable means; (i) manipulating the stopcock mechanism to unlock the inflatable means from the inflated condition for deflation thereof; (j) deflating the inflatable means be drawing the saline back into the syringe; (k) monitoring the decrease in the intracranial pressure; and (l) continuing to monitor the intracranial pressure.

Claim 4

A method for utilizing an intracranial ventricular catheter assembly comprising a catheter body having a proximal end and a distal end, a connector located at said proximal end of said catheter body, inflatable means mounted at said distal end of said cathether body, a stopcock mechanism mounted along said catheter body at a position distal to said proximal connector, said catheter body having at least one port in the sidewall thereof at a position just proximal to said inflatable means, said catheter body having a first passageway extending from said stopcock mechanism to an interior space of said inflatable means, and said catheter body having a second passageway extending from said port to and through said proximal connector, said method comprising the steps of: (a) connecting pressure sensing means to the proximal connector of said catheter assembly; (b) connecting a syringe having up to 5.0 cc saline therein to the stopcock mechanism by means of a syringe adapter mounted on said stopcock mechanism; (c) forming a drill hole in a skull; (d) appropriately positioning through the drill hole and within the ventricular system of the brain the distal end of the catheter assembly; (e) reading the intracranial pressure; (f) inflating the inflatable means up to 5.0 cc by the addition of 0.5 cc aliquots of saline from the syringe; (g) manipulating said stopcock mechanism to lock said inflatable means in an inflated condition; (h) monitoring the increase of intracranial pressure produced by inflation of the inflatable means; (i) manipulating the stopcock mechanism to unlock the inflatable means from the inflated condition for deflation thereof; (j) deflating the inflatable means be drawing the saline back into the syringe; (k) monitoring the decrease in the intracranial pressure; and (l) continuing to monitor the intracranial pressure.

Claim 5

A method for monitoring intracranial pressure in a ventricular system in a brain utilizing a ventricular catheter assembly comprising an elastomeric catheter body having a proximal end and a distal end, a connector located at said proximal end of said catheter body, inflatable means mounted at said distal end of said catheter body, a stopcock mechanism mounted along said catheter body at a position distal to said proximal connector, said catheter body having at least one port in the sidewall thereof at a position just proximal to said inflatable means, said catheter body having a first passageway extending from said stopcock means to an interior space of said inflatable means, and said catheter body having a second passageway therein for the sensing of pressure extending from said portion to and through said proximal connector, said method including the steps of: (a) inserting said catheter assembly into a ventricular system of a brain; (b) inflating said inflatable means; (c) monitoring any change in pressure sensed in said second passageway; (d) deflating said inflatable means; and (e) monitoring any change in pressure sensed in said second passageway.

Claim 6

A method for monitoring intracranial pressure in a ventricular system in a brain utilizing a ventricular catheter assembly comprising an elastomeric catheter body having a proximal end and a distal end, a connector located at said proximal end of said catheter body, inflatable means mounted at said distal end of said catheter body, a stopcock mechanism mounted along said catheter body at a position distal to said proximal connector, said catheter body having at least one port in the sidewall thereof at a position just proximal to said inflatable means, said catheter body having a first passageway extending from said stopcock means to an interior space of said inflatable means, and said catheter body having a second passageway therein for the sensing of pressure extending from said portion to and through said proximal connector, said method including the steps of: (a) inserting said catheter assembly into a ventricular system of a brain; (b) inflating said inflatable means; (c) monitoring any change in pressure sensed in said second passageway; (d) deflating said inflatable means; and (e) monitoring any change in pressure sensed in said second passageway.