Electronic Syringe with Safety System for Spinal Injection
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United States of America Patent
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N/A
Issued Date -
May 21, 2009
app pub date -
Nov 20, 2008
filing date -
Nov 20, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A device for locating an epidural space. The device includes a connector for forming a hermetically sealed connection with a needle. An air vessel is formed by an air tank, a diaphragm, and a space in the needle when the needle is attached to the connector. The device includes a pressure sensor configured to detect the air pressure in the air vessel. An actuator is coupled to a switch and positioned adjacent to the diaphragm to compress the diaphragm when the switch is actuated by a user causing a reduction in volume in the air vessel. A circuit coupled to the pressure sensor and to an alarm detects a signal indicative of the air pressure sensed by the pressure sensor. The circuit compares the signal to a threshold and outputs a first state to the alarm when the pressure is above the threshold, and outputs a second state to the alarm when the pressure falls below the threshold.
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