Evaluation of pre-procedure ultrasound examination as a screening tool for difficult spinal anaesthesia*.

We performed a pre-procedure ultrasound examination of the spine on 60 patients undergoing lower extremity orthopaedic surgery under spinal anaesthesia. We hypothesised that the inability to identify the posterior longitudinal ligament or vertebral body easily with ultrasound would be associated with difficulty placing a spinal anaesthetic. Clinicians blinded to the ultrasound scan performed the injections using the traditional landmark technique. The spinal procedure was videotaped and subsequently reviewed by independent investigators. We defined procedure difficulty by total procedure time (> 400 s) and number of needle passes (≥ 10) required to achieve return of cerebrospinal fluid, or abandonment of the procedure due to unsuccessful dural puncture. When images of the posterior longitudinal ligament were poor (low score group), the mean (SD) number of passes was 21.2 (30.6), compared with 4.8 (7.5) with good ultrasound images (high score group) (p < 0.01). The mean (SD) time for placement was 420 (300) s in the low score group vs 176 (176) s in the high score group (p < 0.01). You can respond to this article at http://www.anaesthesiacorrespondence.com.

Gender affects report of pain and function after arthroscopic anterior cruciate ligament reconstruction.

BACKGROUND: Gender-related differences in pain have been clearly shown in experimental settings. Clinical studies of such differences have produced conflicting findings. No studies have shown a significant difference in pain experience associated with differences in functional outcomes. Arthroscopic anterior cruciate ligament reconstruction (AACLR) produces pain of moderate intensity and provides a useful setting for examining gender-related differences in pain and function. METHODS: This study was a retrospective review of prospectively gathered data collected for a continuous quality improvement program and involved all patients who underwent AACLR at a single outpatient facility since June 1992. Anesthetic, surgical, and perioperative management techniques were standardized. Using a questionnaire, all patients were routinely asked to record pain scores, narcotic consumption, and whether they were able to perform a standardized straight leg-raising maneuver on each of the first 5 postoperative days. RESULTS: A total of 736 patients were enrolled for surgery, 58% of whom completed the entire 5-day questionnaire. Women reported higher pain scores at rest as well as with activity on postoperative day 1 compared with men (P < 0.005). In addition, fewer women were able to perform the straight leg-raising maneuver on postoperative day 1 (P = 0.002) and postoperative day 2 (P = 0.004). There was no difference in the amount of narcotics consumed at any time during the study period. CONCLUSIONS: Women seem to experience greater intensity of pain after AACLR that is associated with a decrease in an intermediate measure of functional outcome. These differences may result from differences in either response to analgesics or neuroprocessing.