Choice of anaesthesia for category-1 caesarean section in women with anticipated difficult tracheal intubation: the use of decision analysis.

A predicted difficult airway is sometimes considered a contra-indication to rapid sequence induction of general anaesthesia, even in an urgent case such as a category-1 caesarean section for fetal distress. However, formally assessing the risk is difficult because of the rarity and urgency of such cases. We have used decision analysis to quantify the time taken to establish anaesthesia, and probability of failure, of three possible anaesthetic methods, based on a systematic review of the literature. We considered rapid sequence induction of general anaesthesia with videolaryngoscopy, awake fibreoptic intubation and rapid spinal anaesthesia. Our results show a shorter mean (95% CI) time to induction of 100 (87-114) s using rapid sequence induction compared with 9 (7-11) min for awake fibreoptic intubation (p < 0.0001) and 6.3 (5.4-7.2) min for spinal anaesthesia (p < 0.0001). We calculate the risk of ultimate failed airway control after rapid sequence induction to be 21 (0-53) per 100,000 cases, and postulate that some mothers may accept such a risk in order to reduce potential fetal harm from an extended time interval until delivery. Although rapid sequence induction may not be the anaesthetic technique of choice for all cases in the circumstance of a category-1 caesarean section for fetal distress with a predicted difficult airway, we suggest that it is an acceptable option.

To proceed or not to proceed: ENT surgery in paediatric patients with acute upper respiratory tract infection.

BACKGROUND: Upper respiratory tract infection is the most common non-preventable cause of surgery cancellation. Consequently, surgeons and anaesthesiologists involved in elective ENT surgical procedures frequently face a dilemma of whether to proceed or to postpone surgery in affected children. METHODS: A literature review was conducted and a practical assessment algorithm proposed. CONCLUSION: The risk-benefit assessment should take into consideration the impact of postponing the surgery intended to bring relief to the child and the risks of proceeding with general anaesthesia in an inflamed airway. The suggested algorithm for assessment may be a useful tool to support the decision of whether to proceed or to postpone surgery.

Postoperative analgesia with tramadol and indomethacin for diagnostic curettage and early termination of pregnancy.

BACKGROUND: The postoperative analgesic effects of rectal indomethacin and tramadol were compared in patients undergoing elective termination of first trimester pregnancy and diagnostic dilatation and curettage. METHODS: Eighty-one American Society of Anesthesiologists class I and II women undergoing first trimester termination of pregnancy or diagnostic dilation and curettage were randomly allocated to receive rectal suppositories of either tramadol 100 mg (n=41) or indomethacin 100 mg (n=40) 90 min before induction of anesthesia. Pain scores and side effects were evaluated until discharge. Intraoperative anesthetic and postoperative analgesic consumption was also recorded. Intravenous metamizole 1 g was employed for postoperative rescue analgesia. RESULTS: When compared to the indomethacin group, the tramadol group required less intraoperative propofol [136 mg ±28 vs. 160 mg ±35 (P=0.001)], less rescue analgesia [2.4% vs. 22% (P=0.005)] and lower visual analogue pain scores [2.4 ±8 vs. 23 ±22 (P=0.005)]. The incidence of postoperative nausea and vomiting was similar in both groups. CONCLUSION: When compared to indomethacin 100 mg, preoperative administration of tramadol 100 mg provides superior postoperative analgesia with minimal adverse effects.

Cuffed oropharyngeal airway (COPA) placement is delayed by wearing antichemical protective gear.

BACKGROUND: Airway management, the first step in resuscitation, may entail special difficulties in mass casualty situations, even in experienced hands. Of the available airway devices, the cuffed oropharyngeal airway (COPA) appears the easiest one to insert, allowing a hands-free anaesthesiologist. A study was undertaken to evaluate the success of airway control with COPA when anaesthetists wore either surgical attire or antichemical protective gear. METHODS: Twelve anaesthetists with 2-5 years of residency inserted COPA in 24 anaesthetised patients in a random crossover prospective manner. The duration of airway management was measured from the time the device was grasped to obtaining a normal capnography recording; time to proper fixation was also recorded. RESULTS: Time to COPA placement was significantly shorter when the anaesthetists wore surgical attire than when they wore protective gear (28 (10) s vs 56 (34) s, p<0.05). Time to proper fixation of the COPA to patients' faces also differed significantly (19 (14) s with surgical attire vs 34 (16) s with protective gear, p<0.05). First-time COPA insertion failure was statistically similar in both groups. There was no hypoxaemia. CONCLUSIONS: Antichemical protective gear slowed proper placement of COPA and its fixation compared with surgical attire. COPA may be a temporarily useful device in non-conventional settings, but functional reassessment is required when injured patients reach medical facilities.

Magnetic acupressure for management of postoperative nausea and vomiting: a preliminary study.

BACKGROUND: To assess the efficacy of magnetic acupressure in the prevention of postoperative nausea and vomiting (PONV). METHODS: Fifty-eight patients were included in this randomized, double blind, preliminary prospective study. Thirty-three underwent ear, nose, and throat (ENT) procedures and twenty-five underwent gynaecological procedures. A magnet patch (M) or a placebo patch (P) was applied to patients in each group randomly. The patch was applied 15 min before surgery to P6 a point situated above the wrist, on the medial aspect of the arm between the palmaris longus and flexor carpi radicis (REF point). Anaesthesia was standardized for all patients. Primary study endpoints included PONV scores and number of rescue antiemetic administrations. Secondary endpoints included pain scores, percentage of patients who required rescue analgesics and satisfaction scores. Study variables were measured on arrival in the PACU and 8, 16 and 24 h after surgery. RESULTS: The global incidence of PONV was 50%. We found no significant difference in the incidence of PONV between ENT patients (46%) and gynaecology patients (56%), and no difference between patients who received magnet treatment (47%) and those that did not (54%). Patients receiving the magnet had a similar satisfaction level (75% satisfied) to those receiving placebo (73% satisfied). In addition, magnet-treated patients had similar pain and PONV scores, and a similar percentage of patients in each groups received postoperative rescue analgesics. Finally, there was no difference in the number of rescue antiemetic administrations between the two groups. CONCLUSION: The use of magnetic acupressure as a prophylactic antiemetic treatment prior to ENT or gynaecology surgeries produced no benefit when compared to placebo.