Lumbar Punctures at an Academic Level 4 NICU: Indications for a New Curriculum

Pediatric residents commonly perform lumbar punctures during their clinical training. The objective of this study was to assess residents' rate of nontraumatic lumbar punctures, examine the adequacy of samples, and implement proper documentation of the procedure in an academic Level 4 Neonatal Intensive Care Unit. We hypothesize that traumatic taps are common and that documentation of the procedure is poor.

A retrospective chart review was done of infants admitted to the neonatal intensive care unit from January 2011 to November 2011 who underwent a lumbar puncture. Procedure notes were evaluated for completion of proper documentation, the lab specimen was assessed for red blood cell count less than 1,000 cells/mm(3), and individuals were assessed for their ability to obtain a cerebrospinal fluid sample to send to the lab for analysis (i.e., sample of adequate volume and not clotted) and the total number of attempts to obtain a sample. A total of 184 charts were reviewed. Procedure notes were incomplete (58%) and lacked pertinent details. Eight percent of samples obtained had no record of the procedure being preformed. There was inadequate sample acquisition in 23% of the lumbar punctures. More than three attempts were noted in 14% of lumbar punctures performed. Many specimens contained very high red blood cell counts. Seventy-five percent of lumbar punctures with full documentation (n = 60), resulted in cerebrospinal fluid with more than 1,000 red blood cells/mm(3) and 55% of underdocumented lumbar punctures resulted in cerebrospinal fluid with more than 1,000 red blood cells/mm(3) (n = 71).

We found that poorly documented lumbar punctures are common and the ability of residents to obtain satisfactory cerebrospinal fluid is low. The inability of residents to consistently perform nontraumatic lumbar punctures is likely a common phenomenon. New educational methods and evaluation criteria must be developed to address this gap in resident education.