CPC A61M 25/0606 (2013.01) [A61M 25/09041 (2013.01); A61M 2205/273 (2013.01); A61M 2205/3538 (2013.01); A61M 2205/3553 (2013.01); A61M 2205/3653 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01); A61M 2205/583 (2013.01); A61M 2205/6027 (2013.01)] | 18 Claims |
1. A catheter insertion system, comprising:
a disposable catheter unit comprising a needle, a guidewire passing through the needle, and a deployable catheter disposed over the needle; and
a detection unit coupled to the catheter unit, the detection unit comprising circuitry electrically coupled to the needle and to the guidewire such that the needle acts as a first electrode and the guidewire acts as a second electrode, the detection unit being configured to measure resistance between the guidewire and the needle while the catheter unit is inserted into a patient and configured to determine an anatomical space within which an end portion of the catheter unit is located within the patient based on the measured resistance; and
wherein a portion of the guidewire within the needle is coated with an electrically insulating material, and an end of the guidewire is left bare.
|