Anesthesia and analgesia
-
Anesthesia and analgesia · Aug 1989
Letter Case ReportsInability to thread epidural catheter through epidural needle.
-
Anesthesia and analgesia · Aug 1989
Randomized Controlled Trial Clinical TrialNormovolemic hemodilution and lumbar epidural anesthesia.
This randomized study was designed to determine the cardiovascular effects of normovolemic hemodilution and lumbar epidural anesthesia in patients scheduled for vascular surgery. The patients were randomly assigned to three different groups: group 1 (N = 10) included patients undergoing lumbar epidural anesthesia without hemodilution; group 2 (N = 10) consisted of patients with normovolemic hemodilution without epidural anesthesia; and in group 3 (N = 10) normovolemic hemodilution was produced during lumbar epidural anesthesia. The three groups included several patients with a history of either myocardial infarction or stable mild angina or treated and controlled hypertension. ⋯ After normovolemic hemodilution, hemoglobin concentration decreased significantly (15%), whereas cardiac index increased significantly (15%) without significant changes either in mean arterial pressure or in heart rate. Systemic oxygen transport and total body oxygen consumption did not change significantly. No patient experienced chest pain or electrocardiographic evidence of myocardial ischemia.(ABSTRACT TRUNCATED AT 250 WORDS)
-
Anesthesia and analgesia · Aug 1989
Effects of succinylcholine at the masseter and adductor pollicis muscles in adults.
The effect of succinylcholine on baseline tension and evoked twitch height was measured at the masseter and the adductor pollicis muscles in ten adults undergoing elective surgery. During thiopental-nitrous oxide-enflurane (end-tidal concentration less than 0.25%) anesthesia, supramaximal stimulation was applied to both the ulnar nerve and the nerve to the masseter. Baseline tension and the isometric force of contraction were measured at the jaw and the thumb. ⋯ In six of the ten patients, baseline tension at the jaw was found to increase by a mean of 80 +/- 24 g (range 25-188 g). It is concluded that in adults, masseter neuromuscular blockade can be achieved with succinylcholine doses approximately equal to those required to block the adductor pollicis. In addition, the drug may cause increased tension in the muscles of the jaw.