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Department of Anesthesiology, Perioperative and Pain Medicine Brigham and Womens Hospital Boston, MA 02115
I read with great interest the case report by Bucklin et al. (1). The authors describe an uncommon situation and very intelligently discuss its management. I would like to point out, however, that one valuable option was missed in the Discussion, namely insertion of the intrathecal catheter at the time inadvertent dural puncture was recognized.
On insertion of the intrathecal catheter, analgesia/anesthesia is provided with a reduced rate of infusion, and the catheter is removed 24 h postinsertion. It has been speculated that foreign body inflammation around the catheter facilitates the closure of the dural defect, thus decreasing headache. This practice was described for obstetric patients (2,3) and was recently accepted at our institution. Maintenance of the intrathecal catheter for a period of 24 h allowed us to reduce the requirement for epidural blood patch by half (4).
Because this practice requires maintenance of the catheter for only 816 additional hours, the risk of infection complications seems to be minimal, making it worth considering even in immunocompromised patients.
References
Department of Anesthesiology University of Nebraska Medical Center Omaha, NE 68198-4455
Department of Obstetrics and Gynecology University of Nebraska Medical Center Omaha, NE 68198-4455
We appreciate Malovs comments regarding our article (1). Because the initial epidural attempt was not difficult and subarachnoid catheter insertion after accidental dural puncture is often reserved for patients with difficult placement or those at risk of repeat dural puncture, continuous spinal analgesia was not considered. Norris and Leighton (2) reported no difference in the incidence of headache in patients receiving either continuous spinal or epidural analgesia after accidental dural puncture. However, a retrospective review (3) suggested a decreased incidence of postdural puncture headache in obstetric patients after indwelling subarachnoid catheterization for >24 h. In addition, anecdotal reports (4) suggest a benefit of postoperative subarachnoid catheterization in patients undergoing cesarean section. Additional prospective, controlled studies are required to confirm the safety and efficacy of prolonged subarachnoid catheterization.
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