Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1998-01-27
1999-11-09
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604168, 604900, A61M 5178
Patent
active
059804920
ABSTRACT:
A blood containment, visualization and tactile confirmation device is provided for use with a vascular entry needle. The device includes a visualization channel and/or a compliant outer wall portion which indicates whether a needle connected to the device has entered a selected blood vessel. The visualization channel is optionally vented to the outside to allow displaced air to escape, but has a gas permeable member to prevent blood from escaping. Alternatively, the visualization channel is substantially sealed such that it is not significantly vented. Preferably, a compliant outer wall portion defining the visualization channel pulses with changes in blood pressure, thereby providing a tactile indication that the needle tip is properly positioned. The device has a guideway with a barrier of elastomeric material which prevents blood from passing therethrough, but which allows passage of an elongated medical instrument such as catheterization apparatus. A flange may optionally be disposed within the compliant membrane to prevent excess depression of the compliant membrane.
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Hillstead Richard A.
Larsen Charles E.
Rosen Jonathan J.
Weldon Thomas D.
Williams David O.
Merit Medical Systems Inc.
Yasko John D.
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