Pneumoneedle with removable stylet assembly
First Claim
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1. A pneumoneedle comprising:
- a) a handle having a longitudinal bore;
b) a hollow needle secured to the handle and opening into the bore, said needle being adapted for penetrating a body cavity and providing a conduit into the cavity;
c) a housing engagable with the handle in alignment with the bore;
d) a stylet slidably received within the housing and for extension through the needle upon engagement of the housing with the handle;
e) biasing means within the housing to resiliently urge the stylet outwardly relative to the housing;
f) interengagable means on the housing and handle to releasably secure the housing in engagement with the handle and maintain the stylet in a condition extending through the needle;
g) valve means carried by the housing for selectively opening and closing the housing to fluid flow therethrough; and
,h) seal means to establish a sealed connection between the needle and valve means when the handle and housing are engaged.
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Accused Products
Abstract
An improved pneumoneedle wherein the stylet forms part of an assembly removably received within the needle housing. The assembly carries a valve to selectively open or close the needle to fluid flow. The stylet is slidably carried by the assembly and resiliently biased to extend through the needle. Removal of the assembly opens the needle. A septum is engagable with the housing to seal the needle when the assembly is removed. A viewable indicator carried by the stylet signals when the needle has completed penetration.
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Citations
22 Claims
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1. A pneumoneedle comprising:
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a) a handle having a longitudinal bore; b) a hollow needle secured to the handle and opening into the bore, said needle being adapted for penetrating a body cavity and providing a conduit into the cavity; c) a housing engagable with the handle in alignment with the bore; d) a stylet slidably received within the housing and for extension through the needle upon engagement of the housing with the handle; e) biasing means within the housing to resiliently urge the stylet outwardly relative to the housing; f) interengagable means on the housing and handle to releasably secure the housing in engagement with the handle and maintain the stylet in a condition extending through the needle; g) valve means carried by the housing for selectively opening and closing the housing to fluid flow therethrough; and
,h) seal means to establish a sealed connection between the needle and valve means when the handle and housing are engaged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pneumoneedle comprising:
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a) a handle having a longitudinal bore; b) a hollow needle secured to the handle and opening into the bore, said needle being adapted for penetrating a body cavity and providing a conduit into the cavity; c) a stylet assembly removably receivable within bore, said assembly comprising a housing and a stylet carried by the housing for longitudinal movement relative thereto and extension through the needle; d) biasing means within the housing to resiliently urge the stylet outwardly relative to the housing; e) interengagable means on the handle and the stylet assembly to releasably secure the assembly within the bore and maintain the stylet in a condition extending through the needle; f) valve means carried by the assembly for selectively opening and closing the assembly to fluid flow therethrough; and g) seal means to establish sealed communication between the stylet assembly and needle when the assembly is received within the bore. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification