Rocuronium versus succinylcholine: are they equally effective during rapid-sequence induction of anesthesia? A large simple randomized trial of rocuronium versus succinylcholine in rapid-sequence induction of anaesthesia along with propofol. Rocuronium versus succinylcholine for rapid sequence induction of anesthesia and endotracheal intubation: a prospective, randomized trial in emergent cases. Double-blind comparison of two doses of rocuronium and succinylcholine for rapid-sequence intubation. A mixture of mivacurium and rocuronium is comparable in clinical onset to succinylcholine. Rocuronium versus succinylcholine for rapid-sequence induction using a variation of the timing principle. Rocuronium is not associated with more vocal cord injuries than succinylcholine after rapid-sequence induction: a randomized, prospective, controlled trial. Rocuronium combined with i.v. lidocaine for rapid tracheal intubation. Comparison of rocuronium and mivacurium to succinylcholine during outpatient laparoscopic surgery.
The purpose of our study was to assess the onset and quality of muscle paralysis and intubation conditions with succinylcholine (Sch) or rocuronium (Roc) during rapid-sequence induction. Patients were randomly assigned to receive thiopental (5 mg/kg) and Sch (1.5 mg/kg) or thiopental (5 mg/kg) and Roc (1.2 mg/kg). The anesthesiologists performing the endotracheal intubation were blinded by standing with their back to the patient. Thirty seconds after drug administration, laryngoscopy was performed. Intubating conditions were scored, the clinical onset of apnea was noted, and a train-of-four monitor recorded data. All patients were ASA physical status I-III and scheduled for emergency procedures; both groups were demographically similar. Thirteen patients received Roc and 13 received Sch. There was no significant difference between the two groups in the number of patients receiving excellent intubating scores (P = 0.41) or in the combined number of patients receiving good and excellent scores (P = 1.0). There was no significant difference in time of onset of apnea for Sch (22+/-13 s) versus Roc (16+/-8s). The return of the first twitch response was significantly faster with Sch (5.05+/-2.5 min) compared with Roc (17.3+/-21.7 min) (P = 0.0001).
                In pediatric patients scheduled for emergency surgery, thiopental 5 mg/kg and rocuronium 1.2 mg/kg provided conditions for the completion of intubation in <60 s comparable to those provided by thiopental 5 mg/kg and succinylcholine 1.5 mg/kg. We conclude that rocuronium is a reasonable substitute for succinylcholine in children for rapid-sequence intubation when a rapid return to spontaneous respiration is not desired. Rocuronium has an onset of action more rapid than other non-depolarizing neuromuscular blocking agents, but it is unclear whether it and succinylcholine give equivalent intubating conditions during rapid-sequence induction of anaesthesia. We performed this study to answer the question--are there clinically relevant differences between the use of rocuronium and succinylcholine to secure acceptable intubating conditions during rapid-sequence induction of anaesthesia with propofol?
                Anaesthesia was induced using propofol 2.5 mg/kg in 349 ASA physical status grade I-IV patients who were undergoing either elective or emergency surgery. Propofol was followed immediately by either rocuronium 0.6 or 1 mg/kg or succinylcholine 1.0 mg/kg (randomly selected). Fifty seconds after the end of muscle relaxant injection laryngoscopy was performed and intubating conditions were graded by an experienced anaesthetist blind to the muscle relaxant allocation. This study design was selected so that a 10% difference in clinically acceptable intubating conditions between drugs would be detectable.
                In this setting rocuronium 1.0 mg/kg provided superior intubating conditions compared with rocuronium 0.6 mg/kg. The incidence of clinically acceptable intubating conditions with rocuronium 1.0 mg/kg and succinylcholine 1.0 mg/kg was 93.2% and 97.1% respectively, the difference being -3.9% (95% C.I. -9.7% to 1.9%).
                Rocuronium 1.0 mg/kg given along with propofol in a rapid-sequence induction of anaesthesia is clinically equivalent to succinylcholine 1.0 mg/kg. When anesthesia is induced with propofol in elective cases, endotracheal intubation conditions are not different between succinylcholine and rocuronium approximately 60 s after the injection of the neuromuscular relaxant. In the present study, we investigated whether, in emergent cases, endotracheal intubation conditions obtained at the actual moment of intubation under succinylcholine differ from those obtained 60 s after the injection of rocuronium. One-hundred-eighty adult patients requiring rapid sequence induction of anesthesia for emergent surgery received propofol (1.5 mg/kg) and either rocuronium (0.6 mg/kg; endotracheal intubation 60 s after injection) or succinylcholine (1 mg/kg; endotracheal intubation as soon as possible). The time from beginning of the induction until completion of the intubation was shorter after the administration of succinylcholine than after rocuronium (median time 95 s versus 130 s; P < 0.0001). Endotracheal intubation conditions, rated with a 9-point scale, were better after succinylcholine administration than after rocuronium (8.6 +/- 1.1 versus 8.0 +/- 1.5; P < 0.001). There was no significant difference in patients with poor intubation conditions (7 versus 12) or in patients with failed first intubation attempt (4 versus 5) between the groups. We conclude that during rapid sequence induction of anesthesia in emergent cases, succinylcholine allows for a more rapid endotracheal intubation sequence and creates superior intubation conditions compared with rocuronium. To compare the pharmacodynamics of two commonly recommended doses of rocuronium bromide (0.7 mg/kg and 0.9 mg/kg) and succinylcholine (1.5 mg/kg) when used for rapid-sequence intubation.
                Prospective, double-blind, randomized study.
                Operating rooms at a university hospital.
                45 ASA physical status I and II adult patients scheduled for elective surgeries under general anesthesia.
                Nonpremedicated patients were anesthetized with fentanyl 2 mcg/kg followed by thiopental sodium 4 to 5 mg/kg and muscle relaxant using rapid-sequence technique. Group 1 (n = 15) received rocuronium bromide 0.7 mg/kg. Group 2 (n = 16) received rocuronium bromide 0.9 mg/kg, and Group 3 (n = 14) received succinylcholine 1.5 mg/kg. Intubation was performed 60 seconds after the administration of muscle relaxant.
                The case of intubation was scored using a scale of 1 to 4. Blood pressure and heart rate were measured beginning one minute before induction of anesthesia up to 5 minutes after intubation. Intubation scores were similar in groups 2 and 3 and were noted as good or excellent in all patients. Group 1 displayed a significantly lower intubation score than the other two groups; 60% were rated as poor. No significant differences in hemodynamic data were seen among the three groups.
                Rocuronium bromide at a dose of 0.9 mg/kg provides intubating conditions similar to succinylcholine 1.5 mg/kg at 1 minute. Intubating conditions at 1 minute following a 0.7 mg/kg dose of rocuronium are not as good as those following a 0.9 mg/kg dose of rocuronium or a 1.5 mg/kg dose of succinylcholine. To compare the clinical onset and duration of a combination of mivacurium and rocuronium with succinylcholine, and to determine the efficacy of this mixture for rapid tracheal intubation.
                Observer-blind prospective study.
                Teaching hospital.
                70 ASA status I and II patients having general anesthesia for elective surgery.
                After induction of general anesthesia, patients randomly received succinylcholine 1.0 mg/kg, rocuronium 0.6 mg/kg, or a combination of rocuronium 0.6 mg/kg and mivacurium 0.15 mg/kg. Evoked muscular response at the adductor pollicis was measured by mechanomyography. The time from injection of muscle relaxant(s) to ablation of T1 (clinical onset) and recovery of T1 to 25% of control height (clinical duration) was recorded. Intubating conditions 45 seconds after administration of muscle relaxants were assessed. There was no significant difference in clinical onset time between succinylcholine (mean +/- SD, 47.4 +/- 6.5 seconds) and the combination of mivacurium-rocuronium (51.2 +/- 13.4 seconds). Intubating conditions with mivacurium-rocuronium were comparable to those of succinylcholine. The clinical duration of rocuronium 0.6 mg/kg (38.9 +/- 12.3 minutes) was prolonged by the addition of mivacurium (49.0 +/- 9.6 minutes).
                This combination of mivacurium and rocuronium is comparable to succinylcholine in both clinical onset time and quality of intubating conditions. When rapid onset of dense neuromuscular blockade and intermediate clinical duration is desirable, this mixture may be an acceptable alternative to succinylcholine. To determine if, using a variation of the "timing" principle, 0.6 mg/kg of rocuronium can achieve an onset time and intubating conditions similar to those achieved with succinylcholine.
                Prospective, randomized, double-blind clinical comparison.
                Operating room in a university medical center.
                42 ASA physical status I and II patients undergoing general anesthesia for elective surgery.
                All patients were fitted with a Grass FT-10 force transducer attached to the thumb. Supramaximal stimulation was applied to the ulnar nerve with a variable current peripheral nerve stimulator. 22 patients (succinylcholine group) received a placebo bolus injection followed 20 seconds later by thiopental 4 to 5 mg/kg and succinylcholine 1 mg/kg; 20 additional patients (rocuronium group) received a bolus dose of rocuronium 0.6 mg/kg followed 20 seconds later by thiopental 4 to 5 mg/kg and a placebo bolus injection.
                We measured the onset time from administration of the muscle relaxant to 95% twitch reduction and assessed the quality of intubating conditions 60 seconds after the induction of anesthesia. There was a significant difference in the mean onset time of rocuronium (72 sec) versus succinylcholine (42 sec, p < 0.0001). However, there was no significant difference in intubating conditions 60 seconds after administration of thiopental.
                Rocuronium given 20 seconds prior to thiopental provides intubating conditions equivalent to thiopental-succinylcholine for rapid-sequence inductions, circumventing rocuronium's longer onset time to 95% neuromuscular blockade. Postoperative hoarseness (PH), sore throat (ST), and vocal cord injuries (VCI) are common complications after general anesthesia. Excellent endotracheal intubating conditions are associated with less laryngeal morbidity than good or poor intubating conditions. Thus, we tested the hypothesis that a rapid-sequence induction (RSI) with succinylcholine would lead to less PH and VCI than with rocuronium. In this prospective trial, 160 patients were randomized in 2 groups to receive thiopental 5.0 mg/kg, fentanyl 3.0 microg/kg, succinylcholine 1.0 mg/kg, or rocuronium 0.6 mg/kg during RSI. PH and ST were assessed at 24, 48, and 72 h after surgery, VCI were examined by stroboscopy in those patients who had PH >3 days. Excellent and clinically acceptable intubating conditions were significantly increased in the succinylcholine group compared with the rocuronium group: 57% versus 21% and 89% versus 59%, respectively (P < 0.001). The incidence and severity of PH, and VCI between the succinylcholine and the rocuronium groups did not differ significantly: PH: 50% versus 51% (P = 0.99) and VCI: 3% versus 1% (P = 0.98), respectively. Similar findings were found for ST, 39% versus 28% (P = 0.22), and postoperative myalgia, 39% versus 29% (P = 0.25), respectively. Intubating conditions were significantly better in the succinylcholine group compared with the rocuronium group. The incidence and severity of ST and myalgia were not increased in the patients receiving succinylcholine. However, the rate of PH and VCI was similar to the rocuronium group. Rocuronium (ORG 9426) has been shown to have an onset of action more rapid than other nondepolarizing neuromuscular blocking agents and to provide intubating conditions similar to those of succinylcholine 60-90 s after administration. We compared the intubating conditions and hemodynamic changes after the administration of rocuronium 0.6 mg kg(-1) and lidocaine 1.5 mg kg(-1) with rocuronium alone and succinylcholine 60 and 90 s after administration.
                One hundred and twenty-five adult patients of ASA physical status I or II scheduled for elective surgery were randomly divided into five groups. After propofol administration in all patients, patients in group Su (succinylcholine), group R60 (rocuronium) and group RL60 (rocuronium-lidocaine) were intubated within 60 s, while groups RL90 and R90 were intubated 90 s after the administration of rocuronium and succinylcholine. Laryngoscopy was performed and intubating conditions were graded by an experienced anesthetist blind to the muscle relaxant allocation.
                In this study, groups Su, RL60, R90 and RL90 had similar intubation scores, which were significantly better than that for group R60. Heart rate did not increase after intubation in groups Su, RL60 and RL90.
                The combination of lidocaine (1.5 mg kg(-1)) and low-dose rocuronium (0.6 mg kg(-1)) along with propofol is clinically equivalent to succinylcholine, improves intubating conditions in 60 s and effectively blocks increases in heart rate after intubation. Tracheal intubating conditions and neuromuscular effects of succinylcholine, rocuronium, and mivacurium were studied in 100 healthy women undergoing outpatient laparoscopic surgery. After a standardized fentanyl-thiopental induction, tracheal intubation was facilitated with succinylcholine 1 mg/kg in Groups I (n = 23) and II (n = 25), rocuronium 0.6 mg/kg in Group III (n = 27), or mivacurium 0.2 mg/kg in Group IV (n = 25). If clinically indicated, bolus doses of rocuronium 5-10 mg (Groups I and III) or mivacurium 2-4 mg (Groups II and IV) were administered during the maintenance period. Anesthesia was maintained with desflurane and nitrous oxide 60% in oxygen. At the end of the surgery, residual neuromuscular block was reversed with edrophonium 0.5 mg/kg and atropine 10 micrograms/kg, if needed. The neuromuscular function was assessed using electromyography with a train-of-four mode of stimulation every 10 s at the wrist. Intubating conditions 90 s after succinylcholine and rocuronium were significantly better than after mivacurium. The onset time (from the end of injection until 95% suppression of the first twitch [T1]) for succinylcholine (63 +/- 21 s and 62 +/- 17 s in Groups I and II, respectively) were significantly shorter than for rocuronium (158 +/- 76 s) or mivacurium (210 +/- 93 s). Moreover, the onset times for rocuronium were significantly shorter than mivacurium. The recovery times (of T1 to 25% of the control value) were significantly shorter with succinylcholine and mivacurium than rocuronium. Significantly fewer patients needed reversal of residual neuromuscular blockade after mivacurium compared to rocuronium. One patient in Group I and six patients in Group IV displayed erythema on the upper body. Postoperative myalgia were experienced by 16% of the patients in Groups I and II compared to none in Groups III and IV. There was on difference in the incidence of postoperative nausea and vomiting among the four groups. In conclusion, rocuronium appears to be an acceptable alternative to succinylcholine for tracheal intubation. However, rocuronium's longer duration of action increases the need for reversal drugs. When rapid tracheal intubation is unnecessary, mivacurium is also an acceptable alternative to succinylcholine and is associated with a more rapid spontaneous recovery than rocuronium.
Succinylcholine created superior intubation conditions to rocuronium when comparing both excellent and clinically acceptable intubating conditions.