Abstract A catheter placement unit primarily useful with equipment for monitoring central venous pressure comprises a length of flexible hollow tubing having a female fitting at one end for attachment to the equipment and a male fitting adjacent the other end for attachment to the hub of a flexible intravenous plastic catheter that has been introduced into the vein of a patient. The male fitting has an axial opening through which the tubing passes and across the opening is positioned an elastomeric diaphragm having a slit which tightly engages the outer periphery of the tubing to form a seal between the male fitting and the tubing and to yieldingly resist the movement of the tubing relative to the male fitting. A stylet is preferably provided within the lumen of the tubing and a flexible plastic sheath preferably covers the tubing to provide a sterile procedure for feeding the tubing through the male fitting and plastic catheter.
A catheter placement unit for use with an intravenous catheter having a hub with an internal tapered surface and a terminal flange, an elongated flexible length of hollow tubing; a first fitting secured to the proximal end of said tubing; and a second fitting slidably mounted adjacent the distal end of said tubing, said second fitting having an axial opening therethrough and an elastomeric diaphragm secured across said opening and having an aperture for the passage of said tubing, defining a means to cause said diaphragm to tightly engage the outer periphery of said tubing, said second fitting further having a tapered male connector extending axially from its distal end for mating with the internal tapered surface of the intravenous catheter hub and a threaded locking element encompassing said tapered connector defining a means for coacting with said terminal flange on said catheter hub to securely lock said second fitting to said catheter hub.
Claim 2
Dependent Claim
154 words
A catheter placement unit for use with an intravenous catheter having a hub with an internal tapered surface and a terminal flange, an elongated flexible length of hollow tubing; a first fitting secured to the proximal end of said tubing; and a second fitting slidably mounted adjacent the distal end of said tubing, said second fitting having an axial opening therethrough and an elastomeric diaphragm secured across said opening and having an aperture for the passage of said tubing, defining a means to cause said diaphragm to tightly engage the outer periphery of said tubing, said second fitting further having a tapered male connector extending axially from its distal end for mating with the internal tapered surface of the intravenous catheter hub and a threaded locking element encompassing said tapered connector defining a means for coacting with said terminal flange on said catheter hub to securely lock said second fitting to said catheter hub.
Claim 3
Dependent Claim
16 words
The catheter assembly of claim 1 wherein said aperture is a slit formed in said diaphragm.
Claim 4
Dependent Claim
34 words
The catheter assembly of claim 1 further comprising a flexible plastic sheath secured to said second fitting and being of sufficient length to enclose the entire length of said tubing and said first fitting.
Claim 5
Dependent Claim
17 words
The catheter assembly of claim 3 wherein said sheath has a frangible connection to said second fitting.
Claim 6
Dependent Claim
17 words
The catheter assembly of claim 4 further comprising a stylet completely filling the lumen of said tubing.