Effects of Osteotomy on Hemodynamic Parameters and Depth of Anesthesia in Rhinoplasty Operations.

BACKGROUND: Bleeding during rhinoplasty leads to many undesirable effects, such as loss of vision in the surgery area, complications during the procedure, and postoperative complications. The most important effect that increases bleeding is hemodynamic changes during surgery. Considering that osteotomy is the most challenging process in rhinoplasty, this study aimed to examine the hemodynamic changes during osteotomy and changes in the depth of anesthesia. METHODS: A total of 50 patients, aged 18 to 65 years with an ASA (American Society of Anesthesiology) score of 1 and 2, who underwent osteotomy during rhinoplasty under general anesthesia, were examined retrospectively. After routine monitoring, the patients underwent general anesthesia induction and endotracheal intubation. Before the surgery, they received remifentanil 1 µg/kg as an intravenous bolus followed by 0.5 µg/(kg·min) as intravenous infusion until the end of the surgery. The hemodynamic parameters and depth of anesthesia [bispectral index (BIS) values] of the patients were examined before anesthesia, 10 minutes before osteotomy, during osteotomy, and 10 minutes after osteotomy. RESULTS: A significant difference was found in heart rate (beats/min), systolic and diastolic blood pressures (mm Hg), and BIS values of the patients measured before, during, and after osteotomy (P < 0.001). The heart rate, systolic and diastolic blood pressures, and BIS values were significantly higher during osteotomy. Until the 10th minute after osteotomy, all 4 parameters nearly reached the values measured before osteotomy. CONCLUSIONS: Osteotomy directly affects hemodynamic parameters and depth of anesthesia. Hence, it is of utmost importance that the analgesic need and depth of anesthesia are adequately monitored and adjusted during osteotomy. By suppressing hemodynamic stress responses, the amount of bleeding can be reduced, thus increasing the surgical success and the patient's comfort.

Which Is More Effective for Minimally Invasive Pectus Repair: Epidural or Paravertebral Block?

Objective: The aim of this study was to compare the effectiveness of epidural block (EDB) and paravertebral block (PVB) for minimally invasive pectus repair with the conventional method in terms of pain control during and after pectus operations, patient comfort, and length of stay in hospital. Materials and Methods: A retrospective review was made of patients who underwent minimally invasive pectus repair. The patients were allocated into three groups as follows: PVB group (Pre-emptive ultrasound-guided bilateral thoracic single injection PVB, n = 15); EDB group (Pre-emptive landmark-guided single injection thoracic EDB, n = 8); and Control group (Neither PVB nor EPB, n = 9). The intraoperative analgesic requirement was recorded, and a visual analog scale (VAS) for pain evaluation and the Postoperative Patient Satisfaction Scale were applied to all patients. Results: The intraoperative analgesic requirement, VAS scores, postoperative satisfaction level, and time to first requirement for postoperative analgesia were different between the control and PVB groups (P < .001) and between the control and EDB groups (P < .001), but not different between the PVB and EDB groups. Although the length of stay in hospital was shorter in the PVB and EDB groups compared to the control group, the difference was not statistically significant (P = .422). Conclusion: Epidural and bilateral paravertebral blockades performed in conjunction with general anesthesia decrease the intraoperative and postoperative need for analgesics, and might be beneficial for pain management and contribute to a shorter length of hospital stay for patients undergoing minimally invasive pectus repair operations. Both blockades also significantly improved the patient satisfaction.

Dexmedetomidine as an Alternative Anesthetic Agent for Flap Surgery: An Intravital Evaluation in the Cremaster Muscle Flap.

INTRODUCTION: Flap surgery is one of the most commonly used techniques of reconstructive surgery for effective repair of damaged tissue. Optimal anesthetic technique and anesthetic agent plays an important role in flap perfusion. This study aimed to evaluate the effects of dexmedetomidine infusion on the microcirculation in the cremaster muscle flap by direct in vivo monitoring. MATERIALS AND METHODS: We randomly divided 9 Wistar albino rats into 3 groups. The rats in the control group underwent the surgical procedure (isolation of the cremaster muscle) alone; the rats in the experimental groups 1 and 2 received an infusion of dexmedetomidine (10 and 30 min) after the surgical procedure. RESULTS: The means of vessel diameters, number of functional capillaries, and movements of leukocytes in all groups were evaluated using intravital microscopic examination. The diameters of the arterioles and venules of the cremaster muscle significantly increased in the dexmedetomidine groups. The number of functional capillaries was higher in the dexmedetomidine groups than in the control group. No difference was observed in the movements of leukocytes between the control and experimental groups. Dexmedetomidine significantly increased the diameters of the arterioles and venules of the cremaster flap and the number of functional capillaries. CONCLUSION: On the basis of the effects of dexmedetomidine on microcirculation, we suggest that dexmedetomidine continue to be used as an anesthetic agent, and may be considered also for reconstructive procedures, particularly flap surgery.

Evaluation of the systemic antiinflammatory effects of levosimendan in an experimental blunt thoracic trauma model.

BACKGROUND: Blunt thoracic injury often leads to pulmonary contusion and the development of acute respiratory distress syndrome, which carries a high risk of morbidity and mortality, originating from the local and systemic inflammatory states. This study aimed to investigate the local and systemic antiinflammatory effects of levosimendan in rat models of blunt chest trauma. METHODS: A total of 32 Wistar albino rats were randomly assigned to one of the following four groups: control, sham, low-dose levosimendan (LDL) (5 µg/kg loading dose for 10 min and 0.05 µg/kg/min intravenous infusion), and high-dose levosimendan (HDL) (10 µg/kg loading dose for 10 min and 0.1 µg/kg/min intravenous infusion). Blunt chest trauma was induced, and after 6 h, the contused pulmonary tissues were histopathologically and immunohistopathologically evaluated, serum TNF-α, IL-1ß, IL-6, and NO levels were biochemically evaluated. RESULTS: The mean arterial pressure was low throughout the experiment in the LDL and HDL groups, with no statistically difference between the groups. Levosimendan reduced the alveolar congestion and hemorrhage, which developed after inducing trauma. Neutrophil infiltration to the damaged pulmonary tissue was also reduced in both the LDL and HDL groups. In rats in which pulmonary contusion (PC) was observed, increased activation of nuclear factor kappa B was observed in the pulmonary tissue, and levosimendan did not reduce this activation. Both high and low doses of levosimendan reduced serum IL-1ß levels, and high doses of levosimendan reduced IL-6 and NO levels. TNF-α levels were not reduced. CONCLUSION: In conclusion, the results showed that in a rat model of PC, the experimental agent levosimendan could reduce neutrophil cell infiltration to damaged pulmonary tissues and the systemic expressions of some cytokines (IL-1ß, IL-6, and NO), thereby partially reducing and/or correcting pulmonary damage. Systemic inflammatory response that occurs after trauma could also be reduced.

Unexpected difficult airway with hypogonadotropic hypogonadism.

BACKGROUND: A critical aspect of safe general anesthesia is providing adequate ventilation and oxygenation. Failed endotracheal intubation and inadequate ventilation with insufficient oxygenation may lead to serious complications, even death. Anesthesiologists rarely encounter unexpected difficult airway problems in daily routine. Management of an unexpectedly difficult airway consists of laryngeal mask ventilation, gum-elastic bougie and video laryngoscopy-assisted intubation. Gum-elastic bougie is the easiest and cheapest tool used in case of an unexpected difficult intubation occurring in the operating room. CASE: A 53-year-old male patient with hypogonadotropic hypogonadism presented as an unexpected difficult intubation after the induction of anesthesia. No pathological finding or predictor of difficult intubation was present. In addition, bag-mask ventilation was poor and inadequate. The patient was finally successfully intubated with a gum-elastic bougie. CONCLUSION: A difficult airway has been described in patients with a variety of endocrine disorders, including pituitary diseases, but not with hypogonadism. There may be an unrevealed relationship between hypogonadism and difficult airway. Gum-elastic bougie is still the most attainable and effective tool in the operation room in this situation.

The interrelations of radiologic findings and mechanical ventilation in community acquired pneumonia patients admitted to the intensive care unit: a multicentre retrospective study.

BACKGROUND: We evaluated patients admitted to the intensive care units with the diagnosis of community acquired pneumonia (CAP) regarding initial radiographic findings. METHODS: A multicenter retrospective study was held. Chest x ray (CXR) and computerized tomography (CT) findings and also their associations with the need of ventilator support were evaluated. RESULTS: A total of 388 patients were enrolled. Consolidation was the main finding on CXR (89%) and CT (80%) examinations. Of all, 45% had multi-lobar involvement. Bilateral involvement was found in 40% and 44% on CXR and CT respectively. Abscesses and cavitations were rarely found. The highest correlation between CT and CXR findings was observed for interstitial involvement. More than 80% of patients needed ventilator support. Noninvasive mechanical ventilation (NIV) requirement was seen to be more common in those with multi-lobar involvement on CXR as 2.4-fold and consolidation on CT as 47-fold compared with those who do not have these findings. Invasive mechanical ventilation (IMV) need increased 8-fold in patients with multi-lobar involvement on CT. CONCLUSION: CXR and CT findings correlate up to a limit in terms of interstitial involvement but not in high percentages in other findings. CAP patients who are admitted to the ICU are severe cases frequently requiring ventilator support. Initial CT and CXR findings may indicate the need for ventilator support, but the assumed ongoing real practice is important and the value of radiologic evaluation beyond clinical findings to predict the mechanical ventilation need is subject for further evaluation with large patient series.

Community-acquired pneumonia in patients with chronic obstructive pulmonary disease requiring admission to the intensive care unit: risk factors for mortality.

PURPOSE: The aims of this study are to identify factors predicting mortality in patients with chronic obstructive pulmonary disease (COPD) and community-acquired pneumonia (CAP) requiring intensive care unit (ICU) admission and to examine whether noninvasive ventilation treatment reduces mortality. MATERIALS AND METHODS: An analysis was performed on data from patients with CAP hospitalized in the ICUs of 19 different hospitals in Turkey between October 2008 and January 2011. Predictors of mortality were assessed by both univariate and multivariate statistical analyses. RESULTS: Two hundred eleven patients with COPD and CAP were included. The overall ICU mortality was 23.9%. Noninvasive ventilation treatment (odds ratio [OR], 0.12; 95% confidence interval [CI], 0.03-0.49; P = .003), hypertension (OR, 0.13; 95% CI, 0.02-0.93; P = .042), bilateral infiltration (OR, 13.92; 95% CI, 2.94-65.84; P = .001), systemic corticosteroid treatment (OR, 0.19; 95% CI, 0.35-0.96; P = .045), length of ICU stay (OR, 0.65; 95% CI, 0.47-0.89; P = .007), and duration of invasive mechanical ventilation (OR, 1.11; 95% CI, 1.01-1.22; P = .032) were independent factors related to mortality. CONCLUSION: Noninvasive ventilation, hypertension, systemic corticosteroid treatment, and shorter ICU stay are associated with reduced mortality, whereas bilateral infiltration and longer duration of invasive mechanical ventilation are associated with increased risk of mortality in patients with COPD and CAP requiring ICU admission.

Mortality indicators in community-acquired pneumonia requiring intensive care in Turkey.

BACKGROUND: Severe community-acquired pneumonia (SCAP) is a fatal disease. This study was conducted to describe an outcome analysis of the intensive care units (ICUs) of Turkey. METHODS: This study evaluated SCAP cases hospitalized in the ICUs of 19 different hospitals between October 2008 and January 2011. The cases of 413 patients admitted to the ICUs were retrospectively analyzed. RESULTS: Overall 413 patients were included in the study and 129 (31.2%) died. It was found that bilateral pulmonary involvement (odds ratio (OR) 2.5, 95% confidence interval (CI) 1.1-5.7) and CAP PIRO score (OR 2, 95% CI 1.3-2.9) were independent risk factors for a higher in-ICU mortality, while arterial hypertension (OR 0.3, 95% CI 0.1-0.9) and the application of non-invasive ventilation (OR 0.2, 95% CI 0.1-0.5) decreased mortality. No culture of any kind was obtained for 90 (22%) patients during the entire course of the hospitalization. Blood, bronchoalveolar lavage, and non-bronchoscopic lavage cultures yielded enteric Gram-negatives (n=12), followed by Staphylococcus aureus (n=10), pneumococci (n=6), and Pseudomonas aeruginosa (n=6). For 22% of the patients, none of the culture methods were applied. CONCLUSIONS: SCAP requiring ICU admission is associated with considerable mortality for ICU patients. Increased awareness appears essential for the microbiological diagnosis of this disease.

Anesthetic risks associated with Antley-Bixler syndrome.

Antley-Bixler syndrome is an autosomal recessive disorder characterized by multiple bone and cartilaginous abnormalities. The main features of this syndrome include brachycephaly, midface hypoplasia, dysplasia of ears and nose, radiohumeral synostosis, choanal stenosis, or atresia. Distinctive features are based on craniofacial deformity and humeroradial synostosis. In this report, we describe the anesthesia management of a 20-year-old Antley-Bixler syndrome patient who underwent maxillary advancement via Le Fort I osteotomy. During surgical management of craniofacial syndrome patients, particularly Antley-Bixler syndrome, the whole surgical team should be aware of possible deformities involving the airway, which may be underestimated or nondetected prior to surgery. These deformities including choanal atresia/stenosis may lead to failure of nasotracheal intubation and mask ventilation, therefore jeopardizing the surgical procedure and/or patient safety. Accurate preoperative preparation and being aware of the components of this syndrome is vital to eliminate respiratory complications and enable uneventful anesthetic and surgical management.

The value of CRP, IL-6, leptin, cortisol, and peritoneal caspase-3 monitoring in the operative strategy of secondary peritonitis.

BACKGROUND: We aimed to investigate the impact of C-reactive protein (CRP), interleukin (IL)-6, leptin, cortisol, and caspase-3 on the decision of terminating planned abdominal repair in secondary peritonitis. METHODS: Fifteen patients with peritonitis were enrolled into the study. Serum CRP, IL-6, leptin, cortisol, and peritoneal caspase-3 activities were measured. RESULTS: APACHE II scores at 48 hours (h) and age were significantly higher in non-survivors. A significant decrease was observed in caspase-3 activities of patients in whom ≤4 laparotomies were performed when compared with those who underwent >4 laparotomies. For patients who underwent ≤4 laparotomies, there was a significant difference in caspase-3 levels between 0 and 72 h. There was no significant difference in caspase-3 levels in non-survivors; caspase-3 levels were significantly lower in the survivors at 48 and 72 h. Changes in CRP, IL-6, leptin, and cortisol levels were not statistically significant. CONCLUSION: CRP, IL-6, leptin, cortisol, and caspase-3 are not valuable in discriminating the number of planned operations, even though there is a significant decrease in caspase-3 "within" survivors. The discriminative value of caspase-3 for closure should be evaluated in studies in which caspase-3 is monitored for a longer duration in a large number of patients.

Topical ophthalmic cyclosporine in the treatment of toxic epidermal necrolysis.

Aim. To describe a case of toxic epidermal necrolysis (TEN) with ocular involvement treated with topical ophthalmic cyclosporine. Case Presentation. A 20-year-old woman developed TEN following administration of carbamazepine that was prescribed for epilepsy. Ophthalmic examination revealed bilateral pseudomembranous conjunctivitis. She was hospitalized in the intensive care unit and treated with intravenous corticosteroid and immunoglobulin. Topical cyclosporine was used in combination with topical corticosteroids for ocular surface disease. Following two months of ocular treatment, she recovered without any severe ocular complication. Ocular examination at the four-month followup showed a 2 mm of symblepharon in the lower fornix as the sole pathologic finding. Conclusion. Topical ophthalmic cyclosporine may contribute to decrease the ophthalmic complications of TEN and should be considered in the acute stage of the disease.

In vitro antibacterial activity of some systemic and topical antihistaminic preparations.

PURPOSE: In vitro antibacterial activity of topical and systemic antihistaminic preparations containing different active substrates against the standard strains of two bacteria was evaluated. METHODS: Four topical and 3 systemic preparations containing pheniramine maleate, chlorophenoxamine hydrochloride, and diphenhydramine hydrochloride were studied. The antibacterial activities of these preparations against strains of S. aureus (American Type Culture Collection, ATCC 29213) and S. epidermidis (ATCC 25212) were tested using the disc diffusion method. In addition, the Minimal Innhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC) of parenteral preparations for these two bacteria were determined. RESULTS: Pheniramine maleate-topical and pheniramine maleate-systemic had no activity against bacteria, but the others showed various rates of activity. Chlorophenoxamine hydrochloride-topical and chlorophenoxamine hydrochloride-systemic were the most effective (P < 0.05). Despite the same active substrate content, diphenhydramine hydrochloride-topical-1 and diphenhydramine hydrochloride-topical-2 yielded different results when they were compared with each other or with the other preparations. Diphenhydramine hydrochloride-topical-2 had a relatively higher rate of activity than diphenhydramine hydrochloride-topical-1. Inhibition zone diameters were 16.9+/-1.5 mm 12.3+/-0.5 mm for S .aureus, 17.4+/-1.0 mm 0 mm for S .epidermidis respectively (P < 0.05). MIC values of parenteral preparations were equal to or above 125 ?g/ml. CONCLUSION: MIC values of parenteral preparations were higher than their blood levels in clinical use. Thus, effects of parenteral preparations may not have been reflected in routine clinical practice. However, topical forms have antibacterial activity due to additive substrates and the use of high concentration levels at the site of application. Therefore, in selection of topical forms for appropriate cases, these effects should also be taken into consideration. The antibacterial activity of topical antihistaminic preparations may be useful in certain dermatological pathology.

Prospective randomized trial to determine whether inhalational anesthetics have any effects on hearing function.

OBJECTIVE: The purpose of this study was to investigate and compare the effects of inhalation anesthetics (sevoflurane and isoflurane) on hearing function by using an audiometric test battery. DESIGN: A prospective, randomized, double-blind, clinical trial. SETTING: University hospital. PATIENTS: Fifty-three adult patients (American Society of Anesthesiologists I-II) scheduled for sinonasal surgery with intratracheal general anesthesia were enrolled in the study. The patients were premedicated with diazepam intramuscularly. Propofol 2 mg/kg (Diprivan, AstraZeneca, Wilmington, DE) was given intravenously (i.v.) for induction of general anesthesia. After endotracheal intubation with vecuronium i.v. (1 mg/kg), in group 1 (n = 27) sevoflurane 2% and in group 2 (n = 26) isoflurane 1.2% were used to maintain general anesthesia. All patients received nitrous oxide during maintenance. MAIN OUTCOME MEASURES: The patients' hearing function was measured before anesthesia and 24 hours after surgery by means of pure-tone audiometry, high-frequency pure-tone audiometry, and transient evoked otoacoustic emissions (TEOAEs) by the same clinician. RESULTS: There were no statistically significant differences between the demographic data and the hemodynamic and respiratory parameters of the groups. No significant differences were found between groups in hearing thresholds of conventional pure-tone audiometry and extended high frequency (p > .05). For TEOAE responses, no statistically significant differences were determined between pre- and postoperative measurements (p > .05). CONCLUSION: It was audiometrically demonstrated that general anesthesia did not affect the hearing function in any of the patients undergoing sinonasal surgery. These findings encourage the use of sevoflurane or isoflurane as a safe agent without any ototoxic effects in otorhinolaryngologic surgery with general anesthesia.

The effects of preanesthetic, single-dose dexmedetomidine on induction, hemodynamic, and cardiovascular parameters.

STUDY OBJECTIVES: To investigate the hemodynamic, cardiovascular, and recovery effects of dexmedetomidine used as a single preanesthetic dose. DESIGN: Randomized, prospective, double-blind study. SETTING: University Hospital of Kirikkale, Kirikkale, Turkey. PATIENTS: 40 ASA physical status I and II patients, aged 20 to 60 years, who were scheduled for elective cholecystectomy. INTERVENTIONS: Patients were randomly divided into two groups to receive 0.5 microg kg(-1) dexmedetomidine (group D, n = 20) or saline solution (group C, n = 20). Anesthesia was induced with thiopental sodium and vecuronium, and anesthesia was maintained with 4% to 6% desflurane. MEASUREMENTS: Mean arterial pressure (MAP), heart rate (HR), ejection fraction (EF), end-diastolic index (EDI), cardiac index (CI), and stroke volume index (SVI) were recorded at 10-minute intervals. The times for patients to "open eyes on verbal command" and postoperative Aldrete recovery scores were also recorded. MAIN RESULTS: In group C, an increase in HR and MAP occurred after endotracheal intubation. In group D, HR significantly decreased after dexmedetomidine was given. The EDI, CI, SVI, and EF values were similar in groups D and C. The modified Aldrete recovery scores of patients in the recovery room were similar in groups C and D at the 15th minute. CONCLUSIONS: A single dose of dexmedetomidine given before induction of anesthesia decreased thiopental requirements without serious hemodynamic effects or any effect on recovery time.

In vitro antibacterial effects of topical local anesthetics.

BACKGROUND: The antibacterial activities of local anesthetics are recognized. OBJECTIVE: To investigate in vitro the activity of topical local anesthetic ointments at clinical doses. METHODS: The activity of two different local anesthetic ointments including lidocaine 5% and lidocaine/prilocaine 2.5% was tested against Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Pseudomonas aeruginosa, Streptococcus pyogenes and Enterococcus faecalis by the disc-diffusion method. Sterile discs containing topical local anesthetic drugs were prepared taking into account the doses of ointments used in clinical practice. The validity of the methodology was confirmed using topical antibacterial mupirocin. The inhibition zones of the discs were measured. RESULTS: Mupirocin inhibited all the bacteria. Both local anesthetic ointments were found to be most effective on E. coli, whereas they had no effects on P. aeruginosa. Lidocaine 5% revealed antibacterial activity against S. aureus, S. epidermidis, E. coli, S. pyogenes and E. faecalis, but lidocaine/prilocaine 2.5% showed no activity on E. faecalis and inhibited S. pyogenes only at double doses. It was also observed that the antibacterial activity was in a dose-dependent manner. CONCLUSION: In the light of these findings, it might be concluded that topical local anesthetic ointments in routine settings may have a preventive role against some bacteria.

In vitro investigation of the antibacterial effect of ketamine.

BACKGROUND: Antibacterial activity of local anesthetics especially lidocaine has been shown previously. In this study, the antibacterial effect of ketamine, a general anesthetic agent was investigated. METHODS: The antibacterial effect of ketamine was studied using six different strains of bacteria (Staphylococcus aureus, Staphylococcus epidermidis, Entecoccus faecalis, Streptococcus pyogenes, Pseudomonas aeruginosa and Escherichia coli) with disc diffusion method. Ciprofloxacine discs (CIP, oxoid) were used as a control to verify the methodology. Minimal inhibition concentration (MIC) and minimal bactericidal concentration (MBC) of ketamine for these bacteria were also determined. RESULTS: No inhibition was evident in discs containing 62.5 microg of ketamine. Ketamine 125 microg showed activity on all the bacteria tested with the exception of E. coli. The inhibition rates of Ketamine were more prominent at the doses of 250 microg and 500 microg similar to the inhibition rate of CIP. Whereas MIC and MBC values of ketamine for S. aureus and S. pyogenes were 500 microg mL(-1), MIC and MBC values for P. aeruginosa were above 2000 microg mL(-1). For other bacteria, these values ranged between these levels. CONCLUSIONS: Ketamine with higher doses showed antibacterial activity. We thought that it will be proper to use ketamine hesitantly in experimental animal studies like sepsis and translocation.

Comparison of epidural ropivacaine 0.2% and ropivacaine 0.2% in combination with sufentanil 0.75 microg mL-1 for postcaesarean analgesia.

Analgesic techniques after c-section must be effective producing early mobilisation to enable mothers to care effort their babies. In this study, the comparison of ropivacaine 0.2% alone, with ropivacaine 0.2%+sufentanil 0.75 microg mL-1 for patient controlled epidural analgesia (PCEA) was aimed. Fifty women (ASA-I) were enrolled in the study. All patients had combined spinal-epidural anaesthesia. Infusion of analgesic solutions was started when sensory level decreased by two dermatome levels. The patients randomly assigned, into two groups (n=25). In Group-I, ropivacaine 0.2% and sufentanil 0.75 microg mL-1, in Group-II, ropivacaine 0.2% alone were applied (bolus 1.25 mL, lockout 30 min, with 2.5 mL h-1 background infusion). Pain (Visual Analog Scale), motor blockage (Bromage scale) and sedation (Four point scale) were evaluated during 24 hours after Caesarean, using the scales of visual analogue, bromage, and four-point, respectively. Haemodynamic and respiratory parameters, side effects, total drug consumption and additional analgesic need, were recorded. Statistical analysis included student-t, chi-square, and Mann Whitney U tests. There was no difference in demographic data, sedation scores, haemodynamic and respiratory parameters, between the groups. Motor block and pain scores were significantly higher in Group-II than in Group-I at 2 and 4. h. Total drug consumption was 65.24+/-4.20 mL for Group-I and 81.1+/-6.44 mL for Group-II, (P<0.05). Four patients in Group-I and 21 patients in Group-II received additional analgesic. Pruritus was observed more frequently in Group-I. The addition of sufentanil 0.75 microg mL-1 to ropivacaine 0.2% for PCEA after Caesarean led to more effective analgesia and less motor weakness when compared to ropivacaine 0.2% alone, especially during early postoperative period.

The effects of the non-volatile anaesthetic agents, propofol and thiopental, on erythrocyte sedimentation rate.

OBJECTIVES: The reduction of erythrocyte sedimentation rate (ESR) induced by general anaesthesia was demonstrated in our previous study. The purpose of the present study was to investigate whether the type of induction agent (propofol or thiopental) used for general anaesthesia had any effects on ESR. METHODS: Sixty-four patients (ASA Physical Status Classification, I-II) scheduled for elective surgery under general anaesthesia were randomly assigned into two groups. In Group I, propofol and in Group II, thiopental were used as induction agents. Two blood samples were obtained before induction and 10 minutes after endotracheal intubation for ESR measurements. RESULTS: The ESR values of the second samples from both groups were significantly lower than the values of the first samples, but there were no statistically significant differences in ESR values between the values of the two groups. CONCLUSION: The results showed that general anaesthesia decreased ESR values regardless of the type of agents being used for induction of anaesthesia. The reason might be related to other drugs used in both groups, or to a common effector mechanism of the two induction agents. The underlying mechanism needs to be investigated.

The decrease in erythrocyte sedimentation rate related to general anesthesia.

The aim of this study was to investigate whether general anesthetic agents change erythrocyte sedimentation rate (ESR) affecting erythrocytes' shape and membrane structure in routine clinical dose manner. Forty patients (23 female and 17 male) undergoing elective surgery were included to the study. Blood samples were obtained just before induction of the anesthesia and 10 minutes after endotracheal intubation. The ESR was measured using Test-1 ESR analyzer. ESR values of the second blood samples were significantly lower than the first values (p<0.001). At the beginning, the ESR was 18.1+/-11.5 mm/h, and then it decreased to 13.1+/-9.3 at 10th minutes. Our results indicated that anesthetic agents affected the ESR. No increase was observed in the second ESR values which were equal to, or less than the first values. General anesthesia may lead to this decrease changing electrolyte balance of erythrocyte, affecting ligands of agglomerins in membrane directly and indirectly, or changing discoid shape of erythrocyte.

Effects of different anesthetic techniques on serum leptin, C-reactive protein, and cortisol concentrations in anorectal surgery.

AIM: To compare the effects of intratracheal general anesthesia (ITGA) and regional (saddle block) anesthesia on leptin, C-reactive protein (CRP), and cortisol blood concentrations during anorectal surgery. METHODS: Fifty-eight patients suffering from hemorrhoidal disease, pilonidal sinus, anal fissure, or anal fistula were included the study. Patients were randomly assigned into one of the two groups (n=29). Patients in one group received ITGA. After thiopental and fentanyl induction, vecuronium was used as a muscle relaxant. Anesthesia was maintained with sevoflurane. In the other group we applied saddle block, injecting hyperbaric bupivacaine into the subarachnoid space, through the L3-L4 intervertebral space, in the sitting position. Blood samples were collected for leptin, CRP, and cortisol analysis before the induction of anesthesia at 3 and 24 hours postoperatively. RESULTS: Preoperative leptin, CRP, and cortisol concentrations were comparable between the groups. There was no significant difference in postoperative levels of leptin and CRP in both groups. Although not significant, leptin and CRP concentrations were lower in the saddle block group at three hours postoperatively (mean-/+SD, 6.95-/+8.59 and 6.02-/+12.25, respectively) than in the ITGA group (mean-/+SD, 9.04-/+9.89 and 8.40-/+15.75, respectively). During early postoperative period, cortisol increased slightly in the ITGA group and remained at similar level in the saddle block group, but later decreased in both groups. Cortisol levels in the saddle block group were significantly lower than in the ITGA group at 3 hours postoperatively (343.7-/+329.6 vs 611.4-/+569.8; P=0.034). CONCLUSION: Saddle block, a regional anesthetic technique, may attenuate stress response in patients undergoing anorectal surgery, by blocking afferent neural input during early postoperative period.