Repeated spinal drainage has proved advantageous in the treatment of meningitis. It occurred to me that the discomfort of repeated lumbar and cisternal punctures could be avoided by introducing a ureteral catheter, through a specially constructed spinal cannula, into the subarachnoid space and leaving the catheter in place for continuous drainage.
For several years, in the neurosurgical service at the Mayo Clinic, a ureteral catheter frequently has been introduced into one of the lateral ventricles, either to secure gradual decompression in cases of internal hydrocephalus or to control the increased intracranial pressure associated with hydrocephalus, of patients who had inoperable neoplasms of the brain, while they were undergoing roentgen therapy. The ureteral catheter is threaded through a flanged ventricular cannula, previously introduced into the ventricle, with its obturator, through a burr hole placed over the posterior horn of one of the lateral ventricles. The ventricles tolerate well the presence of a ureteral