초록 ▼

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 vis

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 vented to the outside to allow displaced air to escape, but has a gas permeable member to prevent blood from escaping. The visualization channel may have one, two, or more stages, with a first stage chamber which indicates initial penetration of a selected blood vessel, and a second stage chamber which fills more slowly and indicates that the needle remains positioned within the blood vessel. A third stage chamber with entrapped air which compresses slightly due to the heartbeat may also be used. Preferably, a compliant outer wall portion 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 also be disposed within the compliant membrane to prevent excess depression of the compliant membrane.

대표청구항 ▼

[ What is claimed is:] [1.] A blood containment device for use with a vascular entry needle, comprising:a main body portion including distal opening and a proximal opening and a guideway extending therebetween, said distal opening being adapted to communicatively connect to a vascular entry needle,

[ What is claimed is:] [1.] A blood containment device for use with a vascular entry needle, comprising:a main body portion including distal opening and a proximal opening and a guideway extending therebetween, said distal opening being adapted to communicatively connect to a vascular entry needle, and said proximal opening being adapted to receive an elongated medical instrument for passage through said guideway and said vascular entry needle;a barrier disposed in said guideway between said proximal and distal openings which prevents passage of blood through said guideway but allows passage therethrough of an elongated medical instrument;said main body portion including a touch accessible compliant membrane in fluid communication with said distal opening of the device such that blood pressure at said distal opening is transmitted to said compliant membrane, thereby causing said compliant membrane to move responsively to changes in blood pressure at said distal opening; anda support member disposed internally of said compliant membrane to prevent excess depression of said compliant membrane.