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Intracranial pressure monitoring catheter

  • US 4,114,603 A
  • Filed: 08/06/1976
  • Issued: 09/19/1978
  • Est. Priority Date: 08/06/1976
  • Status: Expired due to Term
First Claim
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1. An intracranial pressure monitoring catheter, said catheter having a flexible, ribbon-like distal portion providing flat front and back surfaces, there being a recess in the flat front surface of said portion near the tip thereof and a sealing surface about said recess so that, when the tip of the catheter is inserted through an aperture in a patient'"'"'s skull and placed between the dura mater and the arachnoid membrane with the back face of the catheter supported by the patient'"'"'s skull and dura mater, the arachnoid membrane will bridge the recess in the front surface and a seal will be formed between said sealing surface and the arachnoid membrane,said catheter having a longitudinal lumen for providing a fluid couple between said recess and a pressure measuring device, said ribbon-like portion being of essentially constant cross-sectional shape apart from said recess and being of sufficient length to permit the catheter to pass through an incision in the patient'"'"'s scalp at a point substantially spaced along the skull from said aperture, whereby the catheter may be removed by being drawn longitudinally from the point of exit from the scalp, and spreading of infection from the site of the scalp incision to the skull aperture is inhibited.

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