Canadian journal of anaesthesia = Journal canadien d'anesthésie
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Case Reports
Anaesthetic management of a neonate with prenatally diagnosed cervical tumour and upper airway obstruction.
We report the anaesthetic management of a mother, and airway management of a neonate with a prenatal diagnosis of cervical cystic hygroma causing upper airway obstruction. The mortality of such neonates due to upper airway obstruction is reported to exceed 20% following deliveries. Elective Caesarean section was performed under general anaesthesia, and in utero tracheal intubation of the neonate was accomplished under uninterrupted maternal-fetal circulation. ⋯ We believe that it is important that a multidisciplinary approach be initiated for planning of airway management of the neonate soon after the diagnosis is made. Laryngoscopy blades larger than normal for neonates, and a portable Doppler to monitor the viability of the neonate were found to be useful in the management of the neonate during in utero tracheal intubation. Although estimated blood loss was not increased, nor did uterine atony occur postoperatively despite the use of ritodrine during Caesarean section, the efficacy and safety of ritodrine to delay placental detachment have not been proved.
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Randomized Controlled Trial Comparative Study Clinical Trial
Oral premedication for paediatric ambulatory anaesthesia: a comparison of midazolam and ketamine.
To compare the clinical characteristics of two oral premedicants, midazolam and ketamine, 40 healthy children, one to six years of age, who were scheduled for ambulatory dental surgery, were assigned to receive either oral midazolam 0.5 mg.kg-1 or oral ketamine 5.0 mg.kg-1 in a double-blind, randomized study. Sedation and anxiolysis scores before induction, cooperation at induction of anaesthesia and recovery times and complications were assessed. We found that both drugs effectively sedated the children within 20 min of administration. ⋯ No important side effects were attributable to either premedication. The time until the children were fit for discharge from the hospital after midazolam was approximately 20 min less than after ketamine. In conclusion, midazolam and ketamine offer similar clinical characteristics when used as oral premedications for children undergoing ambulatory surgery, although the time to discharge from hospital may be more rapid after midazolam than after ketamine.
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Randomized Controlled Trial Comparative Study Clinical Trial
Epidural sufentanil does not attenuate the central haemodynamic effects of caesarean section performed under epidural anaesthesia.
The effect of sufentanil 30 micrograms added to the epidural local anaesthetic solutions used for anaesthesia during elective Caesarean section on central haemodynamic variables was studied. Haemodynamic measurements made by thoracic electrical bioimpedance (TEB) monitoring were compared in 21 healthy parturients undergoing Caesarean section under epidural anaesthesia with and without the addition of epidural sufentanil. The patients were randomized to control (Group C) and study (Group S) groups. ⋯ Cardiac index was increased throughout the intraoperative period in Group S but was less frequently elevated in Group C. Ejection fraction was increased throughout the perioperative period in Group S but not in Group C. End-diastolic index increased following iv preloading in both groups and returned to baseline with induction of epidural block.(ABSTRACT TRUNCATED AT 250 WORDS)
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Randomized Controlled Trial Comparative Study Clinical Trial
Hydromorphone patient-controlled analgesia (PCA) after coronary artery bypass surgery.
We conducted a study to compare the effectiveness of patient-controlled analgesia (PCA) technique to conventional analgesic therapy (CAT) after coronary artery bypass graft (CABG). The PCA group received hydromorphone 0.1 mg.hr-1 basal infusion and bolus doses of 0.2 mg Q 5 min (maximum 1.2 mg.hr-1) while the CAT group received morphine 2.5 mg iv Q 30 min prn until extubation followed by prn meperidine 1 mg.kg-1 im Q 4 hr or acetaminophen 325 mg with codeine 30 mg po (1 or 2 tablets) when oral intake was possible. The degree of pain was assessed using a Visual Analogue Scale (VAS) starting after extubation and every 6-8 hr for the next 60 hr. ⋯ During the third postoperative day, the PCA group had a lower VAS pain score, a lower incidence of severe pain defined as a score > 5 on the VAS scale, and a reduced incidence of myocardial ischaemia (P < 0.01). However, there was no difference in the duration, severity, area under the curve (AUC), or heart rate during ischaemic events. Postoperative pulmonary function was abnormal in both groups (NS) with minimal recovery by the fourth day.(ABSTRACT TRUNCATED AT 250 WORDS)