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PubMed2006

Melatonin premedication and the induction dose of propofol.

BACKGROUND AND OBJECTIVES: Melatonin (N-acetyl-5-methoxytryptamine) is the main indolamine secreted by the pineal gland. Many studies showed that premedication with melatonin is associated with preoperative anxiolysis and sedation without impairment of cognitive and psychomotor skills and without prolonging recovery. We hypothesized that melatonin decreases the amount of propofol required to produce an adequate depth of hypnosis at induction time. METHODS: After approval from the research committee of the anaesthesia department, informed written consent was taken from 45 adult patients undergoing different surgical procedures. They were allocated randomly into three groups according to the premedication. At 100 min preoperatively, premedication was given in the form of oral melatonin 3 mg (M3 group), oral melatonin 5 mg (M5 group) or no premedication (P group). After preoxygenation an anaesthesiologist who was blinded to the premedication injected propofol 10 mg over 5 s every 15 s until the bispectral index (BIS) score fell to 45. The total dose of propofol required to achieve a BIS score of 45 was recorded. Response to verbal commands and eyelash reflex was evaluated and correlated to the BIS score and propofol dosage. When a BIS score of 45 was reached, tracheal intubation was accomplished after administration of a narcotic and muscle relaxant. RESULTS: The mean (standard devitation (SD)) induction dose of propofol producing a BIS score of 45 was 134 (25) mg in the placebo group vs. 115 (19.5) and 114 (20.9) mg in the M3 and M5 groups, respectively (P < 0.05). The propofol dose required to achieve loss of eyelash reflex and loss of response to verbal commands was more in the placebo group. Anxiety score as assessed by visual analogue scale (VAS) scored more in the placebo group than both melatonin groups. Time spent in the recovery room did not differ between the three groups. CONCLUSION: Melatonin premedication, in an oral dose of either 3 or 5 mg, reduced the required dose of propofol to achieve a BIS score of 45, reflecting a sufficient level of hypnosis for tracheal intubation without prolongation of postoperative recovery room stay.

Adolescent↗
PubMed1999

Is sestamibi-guided parathyroidectomy really cost-effective?

BACKGROUND: Sestamibi-guided limited neck explorations are an alternative to the standard bilateral neck exploration for patients with primary hyperparathyroidism. A recently published meta-analysis by Denham and Norman (JACS vol.186, 1998) suggested that a sestamibi-directed approach offers a cost benefit because it decreases operative and recovery room times, hospital stay, and the number of frozen sections needed. METHODS: We reviewed 41 bilateral neck explorations for primary hyperparathyroidism and compared our results with those reported by the meta-analysis to determine whether a sestamibi-directed approach is cost effective. RESULTS: Operative and recovery room times averaged 60.3 +/- 19.3 and 45 minutes, respectively. Forty six percent of the patients were treated as outpatients, and 1.21 +/- 0.57 frozen sections were obtained per case. Our standard bilateral exploration cost 47% less than the bilateral approach and 17% less than the sestamibi-directed operation calculated in the meta-analysis. There were no cases of nerve injury or permanent hypocalcemia, 98% of patients were cured, and 61% of patients did not require narcotics postoperatively. CONCLUSIONS: Sestamibi-guided parathyroidectomy may not offer any advantage over the standard bilateral exploration. In our experience, a bilateral neck exploration can be performed on an outpatient basis and at low cost, with a high success rate and minimal morbidity. Most patients do not require narcotics, and the cosmetic results are excellent.

Ambulatory Surgical Procedures↗
PubMed1997

Spinal anesthesia versus intravenous sedation for transvaginal oocyte retrieval: reproductive outcome, side-effects and recovery profiles.

Transvaginal ultrasonically guided oocyte retrieval is commonly performed as part of in vitro fertilization efforts. The impact of anesthetic management on patient outcome from this procedure has not been well characterized. At our institution, patients are offered a choice of either heavy intravenous sedation or spinal anesthesia with minimal or no sedatives. In this pilot study, we retrospectively reviewed the anesthetic management, reproductive outcome and recovery room experience for all patients having oocyte retrieval during a 2-year interval (n = 95). Fifty-one oocyte retrievals were performed under spinal anesthesia, while 44 patients received solely intravenous sedatives. Both groups had similar reproductive outcomes. The intravenous sedation group required a significantly longer period until recovery room discharge criteria were met (P = 0.03), and were more likely to have postoperative emetic episodes (46% versus 6% in the spinal anesthesia group: P < 0.01). Two unplanned hospital admissions occurred in the intravenous sedation group: both were related to uncontrolled nausea and vomiting. We conclude that spinal anesthesia may have advantages over intravenous sedation for oocyte retrieval.

Journal Article↗
PubMed1995

Tranexamic acid (Cyklokapron) reduces perioperative blood loss associated with total knee arthroplasty.

In this prospective, randomized, double-blind study, we have investigated the effect of an antifibrinolytic agent, tranexamic acid (Cyklokapron), on blood loss and transfusion requirements associated with total knee arthroplasty. Twenty-nine patients were allocated randomly to receive either tranexamic acid 15 mg kg-1 or an equal volume of placebo a few minutes before a tourniquet was deflated. Blood loss during surgery, in the recovery room and on the surgical ward was recorded, together with the number of units of blood transfused in hospital. Mean blood loss during surgery was 428 (SD 254) ml in the tranexamic acid group (n = 15) compared with 415 (244) ml in the placebo group (n = 13). In the recovery room the tranexamic acid group lost 127 (95) ml and the placebo group 576 (245) ml (P < 0.001). On the ward the respective volumes were 293 (200) ml and 558 (293) ml (P < 0.01). Total blood loss was 847 (356) ml in the tranexamic acid group and 1549 (574) ml in the placebo group (P < 0.001). During the hospital stay the treatment group received 1.5 (1.3) units of blood compared with 3.3 (1.8) in the control group (P < 0.005). Two patients in the placebo group experienced a thrombotic complication compared with none in the treatment group. We conclude that tranexamic acid reduced perioperative blood loss and transfusion requirements associated with total knee arthroplasty.

Aged↗
PubMed2001

Intrathecal sufentanil and morphine for post-thoracotomy pain relief.

In this double-blind randomized study we compared a group of 15 patients undergoing thoracotomy who received a spinal injection of sufentanil 20 microg combined with morphine (200 microg) after induction of general anaesthesia with a control group of the same size. Post-operative pain was rated on a visual analogue scale (VAS) and a verbal rating scale at rest and with a VAS on coughing. In the recovery room, patients received titrated i.v. morphine until the VAS score was <30, and were followed by patient-controlled analgesia (PCA) for 72 h. The intrathecal sufentanil and morphine group had a lower intra-operative requirement for i.v. sufentanil and needed less i.v. morphine for titration in the recovery room. I.v. PCA morphine consumption and pain scores were lower in the active group than in the control group during the first 24 h. There were no differences after this time. Spirometric data (peak expiratory flow, forced vital capacity and forced expiratory volume in 1 s) were similar in the two groups. We conclude that the combination of intrathecal sufentanil and morphine produces analgesia of rapid onset and with a duration of 24 h.

Adult↗
PubMed1995

Butorphanol: an opioid for day-care paediatric surgery.

The purpose of this study was to compare the side effects and efficacy of equianalgesic doses of morphine (M) and butorphanol (B) in children undergoing similar surgical procedures associated with moderate postoperative pain. We studied 156 healthy children aged 1.5-13 yr who underwent elective inguinal herniorrhaphy or orchidopexy. After induction of anaesthesia subjects were given 150 micrograms.kg-1 M or 30 micrograms.kg-1 B following a randomized, stratified, blocked and double-blind design. A standardized anaesthetic was administered, which included 1.5% halothane, vecuronium, droperidol and mechanical ventilation. The postsurgical four-hour follow-up included assessment of pain, vomiting and respiratory depression. Pain was assessed with mCHEOPS and analgesics were administered when indicated in the recovery room. Each opioid was administered to a group of 78 patients. Within each group, 25 subjects had an iv induction, 21 children had an orchidopexy and 57 had inguinal hernia repairs. The groups were similar with respect to age, weight, and length of surgery. The choice of opioid did not affect recovery times from anaesthesia. Analgesic requirements were similar among the groups. Ten minutes after arrival in the recovery room the B-subjects had a lower pain score than the M-patients. Postoperative vomiting was less among the B-subjects: 14% vs 28%, P = 0.03. Two M-patients required an unscheduled admission to hospital because of vomiting. It is concluded that butorphanol has few advantages over morphine in the population studied.

Adolescent↗
PubMed1991

Comparison of various physiologic and psychomotor parameters in patients sedated with intravenous lorazepam, diazepam, or midazolam during oral surgery.

Intravenously administered lorazepam (0.05 mg/kg), diazepam (0.25 mg/kg), and midazolam (0.1 mg/kg) were compared for sedation during oral surgery under local anesthesia. Sixty patients were randomly allocated into three groups in this double-blind, parallel study. The results from this trial show that all three drugs provide satisfactory sedation. Average mean arterial pressures, however, decreased significantly with midazolam and diazepam. Statistically significantly higher heart rates during the entire procedure were also found for lorazepam when compared with diazepam and midazolam. At the postblock stage, the midazolam group had respiratory rates that were significantly higher than those of the other two drug groups. Patients in the diazepam and midazolam groups took significantly longer to complete the pegboard test at the preblock stage than those in the lorzepam group. At 1, 1.5, and 2 hours after arrival in the recovery room, an inversion of groups took place, with the lorazepam group taking significantly longer for their tests than the other two groups. Significantly more improvement in anxiety levels was found at 10 minutes postdrug for the patients who had received diazepam and this tended to remain so on arrival in the recovery room. When compared with the other two groups, significantly more patients in the lorazepam group reported giddiness/dizziness and significantly more in the diazepam group reported pain on injection.

Adolescent↗
PubMed1992

Operative laparoscopy and postoperative pain relief.

OBJECTIVE: To evaluate the immediate postoperative pain and discomfort in patients who underwent operative laparoscopy under general anesthesia with or without peritoneal lidocaine and incisional bupivacaine instillations. DESIGN: Fifty-four participants were prospectively randomized to three groups: group I, intraperitoneal (IP) lidocaine + intraincisional bupivacaine; group II, intraincisional bupivacaine; and group III, no additional drugs after general anesthesia (controls). SETTING: University Hospital, Reproductive Endocrinology and Infertility Clinics. PATIENTS: Private patients needing operative laparoscopy. INTERVENTIONS: One hundred milligrams of lidocaine were instilled with the irrigation device into the peritoneal cavity at the completion of surgery. Twenty-five milligrams of bupivacaine were injected into infraumbilical and suprapubic incisions. MAIN OUTCOME MEASURES: The analgesic use and modified McGill Present Pain Intensity scores were used for pain evaluation. RESULTS: McGill Present Pain Intensity scores for pain, and narcotic use in the recovery room were less in IP lidocaine-instilled group of patients (P less than 0.05). The mean maximum plasma lidocaine level achieved was 1.01 +/- 0.25 micrograms/mL. CONCLUSIONS: Peritoneal lidocaine and incisional bupivacaine use in operative laparoscopy as described after general anesthesia is safe and effective in reducing postoperative pain in the recovery room.

Adult↗
PubMed1992

Efficacy of rectal ibuprofen in controlling postoperative pain in children.

The efficacy of ibuprofen with scheduled administration, starting preoperatively, for postoperative pain was studied in 128 boys and girls, 4 to 12 yr old, having elective surgery. In a double blind placebo-controlled study, rectal ibuprofen (40 mg.kg-1.day-1 in divided doses) or placebo was given for up to three days. For two hours after surgery heart rate, blood pressure and respiratory rate were recorded every 15 min together with sedation scores and pain scores, as assessed by an observer and the patient. Morphine was given to all children, 0.1 mg.kg-1 iv or 0.15 mg.kg-1 im according to clinical needs. Every morning on the ward the patients were interviewed about the efficacy of the analgesic treatment. All unwanted effects were registered. In the recovery room the heart rate was lower (P less than 0.05) and the patient's pain scores were less (P less than 0.05) in the ibuprofen group. After orthopaedic operations children needed more opioid than after ophthalmic or general surgical procedures (P less than 0.001). However, after all operations the need for additional morphine was less in the recovery room (P less than 0.05), during the day of operation (P less than 0.01) and during the three-day study period (P less than 0.01) in children receiving ibuprofen. On the day of operation the analgesic therapy was considered to be good or very good by 44/53 and 32/49 of the children in ibuprofen and placebo groups, respectively (P less than 0.05). Later, their assessments did not differ.(ABSTRACT TRUNCATED AT 250 WORDS)

Administration, Rectal↗
PubMed1994

Postoperative effects of fentanyl, ketorolac, and piroxicam as analgesics for outpatient laparoscopic procedures.

OBJECTIVE: To compare postoperative analgesia and side effects of intramuscular ketorolac, intravenous fentanyl, and oral piroxicam on healthy women undergoing laparoscopic surgery. METHODS: The study was a randomized double-blind clinical trial of three analgesic drugs. An initial 100-micrograms dose of fentanyl was given at induction, with 25-micrograms boluses after 45 and 90 minutes of operating time. Piroxicam, 40 mg, and ketorolac, 60 mg, were administered 90 and 30 minutes before induction, respectively. RESULTS: Eighty-four subjects were included in the analysis. Ketorolac patients (N = 29) spent significantly less time in the recovery room (median 96 minutes) than those receiving fentanyl (N = 27) (median 121 minutes; P < .01) or piroxicam (N = 28) (median 124 minutes; P < .01) or a verbal descriptive scale, more fentanyl patients (38%) experienced moderate pain at discharge than ketorolac (11%; P < .05) or piroxicam (4%; P < .01) patients. The incidence of measured side effects did not differ significantly between groups. CONCLUSIONS: Intramuscular ketorolac was associated with shorter recovery room stays while providing analgesia equal to intravenous fentanyl or the oral nonsteroidal antiinflammatory drug piroxicam.

Adult↗
PubMed1987

Arterial oxygen desaturation during postoperative transportation: the influence of operation site.

Arterial oxygen saturation in 132 patients was measured using a Biox IV oximeter with an ear probe, during transfer from theatre to recovery room following a variety of surgical procedures. Oxygen saturation decreased to 85% or less in 21.9% of patients and to 90% or less in 61.4%. No predictive factors were identified. It is recommended that supplementary oxygen be given to all patients in the immediate postoperative period, including the period of transit to the recovery room.

Adolescent↗
PubMed2003

[The accuracy of transcutaneous carbon dioxide monitoring during laparoscopic surgery].

BACKGROUND: Laparoscopic procedures are considered relatively low-invasive. However, there exists a small but important risk of developing complications related to carbon dioxide (CO2) insufflation. End-tidal CO2 (PetCO2) monitoring may not be a sufficient guide to adjust pulmonary ventilation during laparoscopic surgery, and arterial CO2 (PaCO2) monitoring is not always indicated. We evaluated the accuracy and feasibility of transcutaneous CO2 (PtcCO2) monitoring during laparoscopic surgery. METHODS: Thirty adult patients undergoing abdominal or gynecological laparoscopic surgery were studied. PtcCO2, PaCO2 and PetCO2 were measured before laparoscopy, and 30 and 60 minutes after beginning of CO2 insufflation. PtcCO2 and PaCO2 were also measured in the recovery room under spontaneous respiration. RESULTS: During operation, the PtcCO2 values demonstrated a high degree of correlation with PaCO2 (r = 0.92), and PetCO2 values also demonstrated generally a good correlation with PaCO2 (r = 0.85). The PtcCO2 PaCO2 gradient was -0.6 +/- 2.2 mmHg, while the PetCO2-PaCO2 gradient was -3.9 +/- 2.7 mmHg. In the recovery room, PtcCO2 values still demonstrated a high correlation with PaCO2 (r = 0.91). CONCLUSIONS: The transcutaneous devices provide an effective method for non-invasive monitoring of PCO2 in situations where continuous monitoring of CO2 levels is desired such as peri-operative period of laparoscopic surgery.

Adult↗
PubMedDate not supplied

Does supplemental perioperative oxygen administration reduce the incidence of wound infection in elective colorectal surgery?

AIM: An association has been proposed between perioperative administration of 80% oxygen and a lower incidence of wound infection after colorectal surgery. The present study was conducted to assess this hypothesis. METHODS: Thirty-eight patients (ASA classification 1 and 2) undergoing elective colorectal cancer surgery were allocated at random to 2 groups. Group 1 consisted of 19 patients who received an admixture of 80% oxygen and 20% nitrogen during anesthesia through an orotracheal tube and during the 2 first hours in the recovery room through a tight facemask with reservoir. Group 2 consisted of 19 patients who received an admixture of 70% nitrous oxide and 30% oxygen during anesthesia, followed by administration of 30% oxygen delivered by a blender through a tight facemask with reservoir in the same manner than group 1, during the first 2 hours in the recovery room. Wound infection was evaluated daily during hospital stay and after 7 days, 2 weeks, and 1 month. RESULTS: The incidence of wound infection was 12.5% in group 1 and 17.6% in group 2 (p=0.53). CONCLUSIONS: The results of this study showed no reduction in the incidence of wound infection following elective colorectal surgery in patients receiving 80% oxygen during the perioperative period.

Aged↗
PubMed1982

Effect of prophylactic epidural morphine or bupivacaine on postoperative pain after upper abdominal surgery.

Morphine 2 mg and 4 mg or bupivacaine 50 mg (another 50 mg 4 h later) was administered into the epidural space prior to general anaesthesia of 40 patients undergoing upper abdominal surgery. During anaesthesia, additional analgesics were not given. In the recovery room (4 h) the pain score (0-10) was lowest in the bupivacaine group (mean 2.4) followed by the 4 mg-morphine group (4.1), 2 mg-morphine group (5.3) and control group (5.7). Half of the patients of the bupivacaine group and those of the 4 mg-morphine group needed no analgesics in the recovery room. Later, in the ward (until next morning 7 am), only morphine patients (5/20) managed without postoperative analgesics. The mean number of requests for analgesics during that time was: 4 mg-morphine 1.3, 2 mg-morphine 1.9, bupivacaine 2.7, and control 2.9. Episodes of hypotension and nausea were most frequent in the bupivacaine group. No serious respiratory complications occurred; 4 h after anaesthesia three patients in the 4 mg-morphine group and two in the bupivacaine group had capillary PCO2 values above 6.65 kPa (50 mmHg), the highest being 7.1 kPa. In two additional patients with choledochal drainage (T-tube), the intracholedochal pressure was shown to rise about 2 kPa 915 mmHg) and 2.7 kPa after epidural injection of 2 mg and 4 mg, respectively. A pressure peak was reached within 10 min and at 75 min the pressure was still 0.7-1.3 kPa above the initial level.

Abdomen↗
PubMed1996

The effect of dextran infusion on antithrombin III concentrations and on platelet function during minor surgery.

The effects of dextran on the antithrombin (AT) III activity and blood coagulation, evaluated with thromboelastography, were investigated in 26 patients (anaesthesia risk class I or II) scheduled for minor surgery under general anaesthesia. In the Dextran group the patients were infused first with dextran 7 ml/kg, then with Ringer's acetate. In the Ringer group, the patients received only Ringer's acetate. In the recovery room fluid therapy was continued with 5% dextrose in water until the first postoperative day. Blood loss and fluid replacement were comparable in the groups. Haematocrit (Hcr) decreased significantly in the Dextran group, and the platelet count decreased in both groups during surgery. The median baseline AT III values were similar in the study groups. In the recovery room, the median AT III value was lower in the Dextran than in the Ringer group, 78% and 92%, respectively (P < 0.05). By the following day, the AT III values had returned near the initial level. After surgery, the maximal amplitude of thromboelastogram was 48 mm in the Dextran group, and 58 mm in the Ringer group (P < 0.05). In conclusion, fluid replacement with dextran resulted in modest and short-lived alterations in blood coagulation.

Adult↗
PubMed1979

On-line computer management of cardiac surgical data.

The surgeon (or one of his assistants) enters, in a computer file, information on open-heart surgical procedures though a remote terminal located in the recovery room. Clinical and historical findings, complications occurring during the immediate postoperative period, and postmortem data when applicable are entered in the course of the hospital stay or after discharge. Relevant information entering the computer system in other hospital departments is automatically incorporated in the open-heart surgery file. A final multicopy operative report is printed in the recovery room shortly after the surgical procedure is completed. All information on patients in the file constitutes a permanent and dynamic data base that is accessible at any time from any remote terminal in the hospital computer system. This data base contains an average of 500 items of information per surgical procedure and is available via an on-line retrieval program for both quality control purposes and extrapolation of prognostic data on new patients.

Cardiac Care Facilities↗
PubMed2000

A randomized, double-blinded study of remifentanil versus fentanyl for tonsillectomy and adenoidectomy surgery in pediatric ambulatory surgical patients.

UNLABELLED: We compared, in a double-blinded manner, the anesthetic maintenance and recovery properties of remifentanil with a clinically comparable fentanyl-based anesthetic technique in pediatric ambulatory surgical patients. Anesthesia was induced with either halothane or sevoflurane and nitrous oxide and oxygen. Patients were randomized (computer generated) to receive either remifentanil or fentanyl in a blinded syringe with nitrous oxide and oxygen in one of four possibilities: halothane/remifentanil, halothane/fentanyl, sevoflurane/remifentanil or sevoflurane/fentanyl. In patients receiving remifentanil, a placebo bolus was administered, and a continuous infusion (0.25 microg. kg(-1). min(-1)) was begun. In patients receiving fentanyl, a bolus (2 microg/kg) was administered followed by a placebo continuous infusion. The time from discontinuation of the anesthetic to extubation, discharge from the postanesthesia care unit (PACU), and discharge to home, as well as pain scores, were assessed by a blinded nurse observer. Systolic blood pressure and heart rate were noted at selected times, and adverse events were recorded. Remifentanil provided faster extubation times and higher pain-discomfort scores. PACU and hospital discharge times were similar. There were no statistical differences among the groups for adverse events. There were statistically, but not clinically, significant differences in hemodynamic variables. We noted that continuous infusions of remifentanil were intraoperatively as effective as bolus fentanyl. Although patients could be tracheally extubated earlier with remifentanil, this did not translate to earlier PACU or hospital discharge times. In addition, remifentanil was associated with higher postoperative pain scores. The frequent incidence of postoperative pain observed in the postoperative recovery room suggests that better intraoperative prophylactic analgesic regimens for postoperative pain control are necessary to optimize remifentanil's use as an anesthetic for children. IMPLICATIONS: This is a study designed to examine the efficacy and safety of a short-acting opioid, remifentanil, when used in pediatric patients. The frequent incidence of postoperative pain observed in the postoperative recovery room suggests that better intraoperative prophylactic analgesic regimens for postoperative pain control are necessary to optimize remifentanil's use as an anesthetic for children.

Adenoidectomy↗
PubMed1993

Comparison of ondansetron versus placebo to prevent postoperative nausea and vomiting in women undergoing ambulatory gynecologic surgery.

BACKGROUND: Postoperative nausea and emesis, especially in ambulatory surgical patients, remains a troublesome problem. This study was performed to compare the incidence of nausea and emesis during the 24-h postoperative period in ondansetron-treated patients versus placebo-treated patients. METHODS: Using a randomized prospective double-blind study design, women between the ages of 18 and 70 yr undergoing gynecologic surgical procedures with general opioid anesthesia on an outpatient basis were enrolled. Ondansetron or placebo was administered prior to induction of anesthesia. Patients were stratified according to history of nausea and emesis during previous exposure to general anesthesia and randomized to dose received. RESULTS: Data from the 544 women showed that all doses of intravenous ondansetron tested (1, 4, and 8 mg) were significantly more effective (62%, 76%, and 77%, respectively) than placebo (46%) in reducing the incidence of emesis following surgery until 24 h after recovery room entry. All these doses were more effective than placebo in patients with no prior history of emesis following surgery and the 4- and 8-mg doses were more effective than placebo in patients with a prior history of emesis following surgery. All doses of ondansetron tested were generally well tolerated with adverse events, clinical laboratory tests, and recovery room vital signs similar to those of placebo. Serum aspartate transaminase (AST) was increased in five patients (1 mg, 2 patients; 4 mg, 1 patient; 8 mg, 2 patients). In the three patients in whom subsequent analysis were performed, the serum AST had decreased to preoperative levels. CONCLUSIONS: Ondansetron given intravenously to prevent postoperative nausea and emesis was highly effective in the 4- and 8-mg doses in women having ambulatory gynecologic surgery.

Adult↗