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Stereotactic instrument guided placement

  • US 5,300,080 A
  • Filed: 11/01/1991
  • Issued: 04/05/1994
  • Est. Priority Date: 11/01/1991
  • Status: Expired due to Fees
First Claim
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1. A ventriculostomy procedure for a human patient, utilizing a catheter guide having opposed point members disposed on a common linear axis, comprising the steps of substantially sequentially:

  • (a) marking the proposed position of a burr hole on the patient'"'"'s skull;

    (b) deciding upon the location of a ventricle, desired to be drained, within the patient'"'"'s skull, to define an intraventricular target point;

    (c) effecting coordinate multiplanar tomographic imaging of the patient'"'"'s skull and brain;

    (d) utilizing data from step (c), calculating a coordinate line between said burr hole proposed position and said intraventricular target point;

    (e) utilizing the calculated coordinate line, determining a fixing point on the patient'"'"'s skull opposite the proposed position of the burr hole, and marking that fixing point on the patient'"'"'s skull;

    (f) forming a burr hole in the patient'"'"'s skull at the marked proposed burr hole position;

    (g) placing the catheter guide into operative association with the patient'"'"'s skull so that the opposed point members engage the burr hole and the fixing point;

    (h) passing a catheter into the burr hole, positively guided by the catheter guide, along the common linear axis of the opposed point members, until the catheter tip reaches the intraventricular target point; and

    (i) draining fluid from the area of the patient'"'"'s brain around the intraventricular target point.

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