BODILY FLUID SPACE ENTRY DETECTION
First Claim
Patent Images
1. A bodily fluid space entry detection system comprising:
- a cannula having a proximal end and a distal end, the distal end defining a sharp tip adapted to enter a bodily fluid space;
a pair of electrical contacts in non-conductive relationship associated with the cannula;
an electrically energizable alert source; and
an alert circuit in electrical communication with the pair of electrical contacts and adapted to cause the alert source to be electrically energized in response to bodily fluid establishing electrical conduction between the pair of electrical contacts whereby to provide an indication that the cannula tip is in a bodily fluid space.
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Abstract
A bodily fluid space entry detection system includes electrical contacts in non-conducting relationship and associated with a needle cannula. Entry of the distal, sharp tip of the cannula into a bodily fluid space such as a blood vessel or epidural space allows bodily fluid such as blood or spinal fluid to make a conduction path between the contacts which, in turn, causes an alert source to be energized to indicate entry into the bodily fluid space. The alert source could be an LED and/or a buzzer.
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Citations
79 Claims
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1. A bodily fluid space entry detection system comprising:
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a cannula having a proximal end and a distal end, the distal end defining a sharp tip adapted to enter a bodily fluid space;
a pair of electrical contacts in non-conductive relationship associated with the cannula;
an electrically energizable alert source; and
an alert circuit in electrical communication with the pair of electrical contacts and adapted to cause the alert source to be electrically energized in response to bodily fluid establishing electrical conduction between the pair of electrical contacts whereby to provide an indication that the cannula tip is in a bodily fluid space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A catheter introducer device comprising:
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a catheter hub and a catheter tube extending therefrom;
a cannula having a proximal end and a distal end, the distal end defining a sharp tip adapted to enter a bodily fluid space, the cannula extending through the catheter tube with the cannula tip projecting out therefrom;
a pair of electrical contacts in non-conductive relationship associated with cannula;
an electrically energizable alert source; and
an alert circuit in electrical communication with the pair of electrical contacts and adapted to cause the alert source to be electrically energized in response to body fluid establishing electrical conduction between the pair of electrical contacts whereby to provide an indication that the cannula tip is in a bodily fluid space. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70)
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- 71. A method of detecting entry of a cannula into a bodily fluid space comprising inserting a tip of a cannula into the bodily fluid space and energizing an alert source in response to body fluid in the bodily fluid space establishing electrical conduction along the cannula.
Specification