There is a dearth of evidence-based practice regarding the differential diagnosis, natural history, and management of post-craniotomy headache. The etiology of post-craniotomy headache is typically multifactorial, with patients' medical history, type of craniotomy, and perioperative management all playing a role. Post-craniotomy headaches are often undertreated, yet available evidence supports a multimodal approach for both prophylaxis and management. Many therapeutic techniques that aim to treat or prevent post-craniotomy headache require more robust validation than clinical evidence currently imparts. Pre- and intraoperative locoregional anesthesia should be the mainstay of prophylaxis; the role of opiates co-administered with analgesics, corticosteroids, and antiepileptic therapy in the acute perioperative phase is of paramount importance. Treatment of chronic PCH is less well-defined but should involve trials of analgesic, antineuropathic, and antiepileptic medications before enlisting experimental treatments. Comorbid psychiatric, musculoskeletal, or seizure disorders should be managed distinctly from post-craniotomy headaches. In patients failing all extant therapies, experimental approaches should be considered. These include subanesthetic ketamine infusion or surgical site injection with local anesthetics, corticosteroids, or botulinum toxin. Post-craniotomy headache is a complex phenomenon with many underutilized treatment options available, and many more under investigation. Nonetheless, further research is required to differentiate the efficacy of contemporary treatment strategies and to elucidate the applicability of novel therapies.
Background. Although anesthesia providers may plan for moderate sedation, the depth of sedation is rarely quantified. Using processed electroencephalography (EEG) to assess the depth of sedation, this study investigates the incidence of general anesthesia with variable burst suppression in patients receiving propofol for outpatient colonoscopy. The lessons learned from neuromonitoring can then be used to guide institutional best sedation practice. Methods. This was a prospective observational study of 119 outpatients undergoing colonoscopy at Thomas Jefferson University Hospital (TJUH). Propofol was administered by CRNAs under anesthesiologists’ supervision. The Patient State Index (PSi™) generated by the Masimo SedLine® Brain Root Function monitor (Masimo Corp., Irvine, CA) was used to assess the depth of sedation. PSi data correlating to general anesthesia with variable burst suppression were confirmed by neuroelectrophysiologists’ interpretation of unprocessed EEG. Results. PSi values of <50 consistent with general anesthesia were attained in 118/119 (99.1%) patients. Of these patients, 33 (27.7%) attained PSi values <25 consistent with variable burst suppression. The 118 patients that reached PSi <50 spent a significantly greater percentage (53.1% vs. 42%) of their case at PSi levels <50 compared to PSi levels >50 (p=0.001). Mean total propofol dose was significantly correlated to patient PSi during periods of PSi <25 (R=0.406, p=0.021). Conclusion. Although providers planned for moderate to deep sedation, processed EEG showed patients were under general anesthesia, often with burst suppression. Anesthesiologists and endoscopists may utilize processed EEG to recognize their institutional practice patterns of procedural sedation with propofol and improve upon it.
BACKGROUND: Delayed bowel function (DBF) following intra-abdominal surgery is a common problem that contributes to postoperative complications and prolonged length of stay. Use of a handheld gastric point-of-care ultrasound (GPOCUS) can identify a full vs empty stomach in the postoperative period. We hypothesized that the findings of a full stomach identified on a postoperative day 1 (POD1) GPOCUS exam would predict an increased risk of delayed bowel function. STUDY DESIGN: A blinded, prospective cohort study was performed. Postoperative colorectal surgery patients were identified as having either a full or empty stomach based on previously published definitions. GPOCUS examinations were performed on POD1 using a handheld ultrasound device, and the clinicians were blinded to the results. Demographic and perioperative data were collected. The primary outcome variable was gastrointestinal-3 (GI-3) recovery, defined as time to tolerance of diet and either flatus or bowel movement. RESULTS: Fifty-six patients agreed to participate in the study; fifty were eligible and included. Eighteen patients’ stomachs were identified as full on POD1 GPOCUS examination, and thirty-two were identified as empty. No significant demographic or perioperative differences existed between groups. Patients with full stomachs had significantly delayed GI-3 recovery (4 vs 1 days, p < 0.0001) and longer length of stay (5 vs 3 days, p < 0.0001). Full-stomach patients also had significantly more emesis and nasogastric tube (NGT) placement (both p < 0.05). CONCLUSIONS: GPOCUS performed on POD1 can predict DBF, length of stay, likelihood of emesis, and NGT placement. Use of handheld devices for GPOCUS showed promise for the identification of patients at high risk for DBF and could provide an opportunity for pre-emptive intervention.
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