The effects of sevoflurane anesthesia on hemodynamics and cerebral artery diameters in endovascular treatment of intracranial aneurysm: A pilot study.

BACKGROUND: Cerebral autoregulation is a steady-state of cerebral blood flow despite major changes in arterial blood pressure. Inhalation anesthetics are cerebral vasodilators. In <1 MAC values, the net effect is a moderate decrease in cerebral blood flow and maintenance of responsiveness to carbon dioxide. This study aims to investigate the effects of steady-state sevoflurane anesthesia on hemodynamic and cerebral artery diameter measurements in patients undergoing flow diverter device placement under general anesthesia. METHODS: Forty-six patients aged 18-70 years who underwent flow diverter devices under general anesthesia were included in this study. Routine monitoring was performed on the patients. Mean arterial pressure (MAP) values were recorded. Internal carotid artery, middle cerebral artery and anterior cerebral artery diameter measurements were made from digital subtraction angiography (DSA) images of patients with anterior aneurysms. Baseline artery, right posterior cerebral artery and left posterior cerebral artery diameter measurements were made from DSA images of patients with posterior aneurysms. These measurements were recorded as preoperative measurements. The same measurements were made from the DSA images performed before the Flow diverter device placement procedure performed under steady-state sevoflurane anesthesia for the same patients. These measurements were recorded as peroperative measurements. RESULTS: The average age of the patients was 56.6±15.1. The MAP of the patients before induction was 76.28±5.13 mmHg, MAP after induction was 64.36±3.23 mmHg, and MAP during sevoflurane anesthesia was 68.26±4.30 mmHg, there was a statistically significant difference. There was a statistically significant difference between the preoperative and perioperative values of anterior cerebral artery diameters. There was a strong relationship between the MAP change percentage and the ICA diameter change percentage (p<0.001, p=-0.785) and a moderate relationship between the MCA diameter change percentage (p=0.033, p=-0.338). CONCLUSION: In patients undergoing flow diverter devices, <1 MAC sevoflurane has a hemodynamic effect and creates significant vasodilation in the cerebral artery diameters.

The Effects of Sugammadex on Progesterone Levels in Pregnant Rats.

BACKGROUND: Sugammadex has been shown to decrease the efficiency of progesterone-containing oral contraceptive drugs which possess a steroid structure. AIMS: The aim of the present study was to evaluate the effects of sugammadex on progesterone levels in pregnant rats as well as on the physiological course of the pregnancy. STUDY DESIGN: Animal experiment. METHODS: This study was approved by the Selçuk University Ethical Committee for Experimental Animal Research. Pregnant Winster Albino rats (n=26) were divided into three groups and administered with various intravenous injections on the 7(th) day of pregnancy. The control group (Group K, n=6) received 1.5 mL serum physiologic, the sugammadex group (Group S, n=10) received 30 mg/kg sugammadex and the sugammadex + rocuronium group (Group SR, n=10) received 30 mg/kg sugammadex and 3.5 mg/kg rocuronium. Progesterone levels were measured and the offspring were monitored for morphologic status. RESULTS: Mean progesterone levels were 94.16±15.54 ng/mL in Group K, 87.86±12.48 ng/mL in Group S, and 94.53±16.10 ng/mL in Group SR (p>0.05). No stillbirth or miscarriage was observed in the rats. The mean number of offspring was 6.8±1.47 in Group K, 6.5±1.35 in Group S, and 6.4±1.17 in Group SR. The offspring appeared macroscopically normal. CONCLUSION: Sugammadex does not appear to affect the progesterone levels in pregnant rats in the first trimester and the clinical course. Successful completion of pregnancy and the absence of stillbirth or miscarriage will guide future studies about the use of sugammadex, particularly in the first trimester of the pregnancy.

Effectiveness of the C-MAC video laryngoscope in the management of unexpected failed intubations.

BACKGROUND AND OBJECTIVES: The purpose of this study was to review the experiences of an anesthesiology department regarding the use of a C-MAC videolaryngoscope in unexpected failed intubation attempts. METHODS: Data were analyzed from 42 patients whose intubation attempts using Macintosh direct laryngoscopes had failed, and on whom a C-MAC videolaryngoscope was utilized as the primary rescue device. The success rate of C-MAC in intubation was assessed, and laryngeal views from both devices were compared. RESULTS: The Cormack and Lehane score was III in 41 patients, and IV in one patient, with the Macintosh laryngoscope, while Cormack and Lehane score was I in 27 patients, II in 14 and III in one with CMAC. Tracheal intubation with CMAC was successful on the first attempt in 36 patients (86%), and on the second attempt in 6 patients (14%). No complications were observed other than minor damage (blood on blade) in 8 patients (19%). CONCLUSION: These data provide evidence for the clinical effectiveness of C-MAC videolaryngoscope in managing the unexpected failed intubations in routine anesthesia care. The C-MAC videolaryngoscope is efficient and safe as a primary rescue device in unexpected failed intubations.

Eficacia do videolaringoscopio C-MAC no manejo de intubacoes malsucedidas inesperadas / Effectiveness of the C-MAC video laryngoscope in the management of unexpected failed intubations / Eficacia del videolaringoscopio C-MAC® en el manejo de intubaciones no exitosas

Justificativa e objetivos: O objetivo deste estudo foi fazer uma revisão das experiências de um departamento de anestesiologia em relação ao uso do videolaringoscópio C-MAC em tentativas malsucedidas de intubação. Métodos: Analisamos os dados de 42 pacientes, cujas tentativas de intubação com o uso delaringoscopia direta (Macintosh) tinham falhado e nos quais o videolaringoscópio C-MAC foi usado como o dispositivo de resgate primário. A taxa de sucesso do C-MAC em intubação foi avaliada e a visão da laringe em ambos os dispositivos foi comparada. Resultados: Com o laringoscópio Macintosh, o escore de Cormack e Lehane foi 3 em 41 pacientes e 4 em um paciente e com o CMAC, foi 1 em 27 pacientes, 2 em 14 pacientes e 3 em um paciente. Intubação traqueal com CMAC foi bem-sucedida em 36 pacientes (86%) na primeira tentativa e em seis pacientes (14%) na segunda tentativa. Nenhuma complicação foi observada, além de pequena lesão (sangue na lâmina) em oito pacientes (19%). Conclusão: Esses dados fornecem evidência para a eficácia clínica do videolaringoscópio C-MAC no manejo de intubações malsucedidas inesperadas em assistência rotineira de anestesia. O videolaringoscópio C-MAC é eficiente e seguro como dispositivo de resgate primário em intubações malsucedidas inesperadas. .

Background and objectives: The purpose of this study was to review the experiences of an anesthesiology department regarding the use of a C-MAC videolaryngoscope in unexpected failed intubation attempts. Methods: Data were analyzed from 42 patients whose intubation attempts using Macintosh direct laryngoscopes had failed, and on whom a C-MAC videolaryngoscope was utilized as the primary rescue device. The success rate of C-MAC in intubation was assessed, and laryngeal views from both devices were compared. Results: The Cormack and Lehane score was III in 41 patients, and IV in one patient, with the Macintosh laryngoscope, while Cormack and Lehane score was I in 27 patients, II in 14 and III in one with CMAC. Tracheal intubation with CMAC was successful on the first attempt in 36 patients (86%), and on the second attempt in 6 patients (14%). No complications were observed other than minor damage (blood on blade) in 8 patients (19%). Conclusion: These data provide evidence for the clinical effectiveness of C-MAC videolaryngoscope in managing the unexpected failed intubations in routine anesthesia care. The C-MAC videolaryngoscope is efficient and safe as a primary rescue device in unexpected failed intubations. .

Justificación y objetivos: El objetivo de este estudio fue hacer una revisión de las experiencias de un departamento de anestesiologia con relación al uso del videolaringoscopio C-MAC® en intentos de intubación que fracasaron. Métodos: Analizamos los datos de 42 pacientes, cuyos intentos de intubación con el uso de laringoscopia directa (Macintosh) habían fallado y en los cuales el videolaringoscopio C-MAC® fue usado como el dispositivo de rescate primario. Se calculó la tasa de éxito del C-MAC® en la intubación y se comprobó la visión de la laringe en los 2 dispositivos. Resultados: Con el laringoscopio Macintosh, la puntuación de Cormack y Lehane fue 3 en 41 pacientes y 4 en un paciente; y con el C-MAC®, fue 1 en 27 pacientes, 2 en 14 pacientes y 3 en un paciente. La intubación traqueal con C-MAC® fue exitosa en 36 pacientes (86%) en el primer intento y en 6 pacientes (14%) en el segundo intento. No se observaron complicaciones, a no ser una pequena lesión (sangre en la lámina) en 8 pacientes (19%). Conclusiones: Esos datos suministran evidencias para la eficacia clínica del videolaringoscopio C-MAC® en el manejo de intubaciones no exitosas inesperadas en asistencia de rutina en anestesia. El videolaringoscopio C-MAC® es eficiente y seguro como dispositivo de rescate primario en intubaciones no exitosas inesperadas. .

Differences in tip visibility and nerve block parameters between two echogenic needles during a simulation study with inexperienced anesthesia trainees.

Needle tip visualization during ultrasound-guided regional anesthesia (UGRA) is necessary for safety and efficacy. However, disruption of the image of the needle tip driven toward the target is a general problem, especially for beginners. The purpose of this study was to compare performance parameters between using the Sonoplex and Stimuplex D-Plus echogenic needles in a simulated ultrasound-guided interventional task by inexperienced anaesthesia residents. After a standardized training session, 28 anesthesiology residents performed simulated nerve blocks in a beef phantom with each needle. All ultrasound images were digitally stored for analysis. The absolute time the needle tip was in view, total procedure time, and angle of needle insertion were subsequently measured objectively by two single investigators. The procedures that used the Sonoplex echogenic needle had significantly better tip visibility and shorter total procedure time at insertion angles between 42° and 64° relative to the phantom surface. We have demonstrated that inexperienced users who used the Sonoplex echogenic needle were able to complete the procedure more quickly. Needles with improved visibility would be a very useful addition to UGRA for inexperienced users.

Caudal anesthesia for minor subumbilical pediatric surgery: a comparison of levobupivacaine alone and levobupivacaine plus sufentanil.

STUDY OBJECTIVES: To compare the postoperative analgesic efficacy and duration of analgesia after caudal levobupivacaine 0.20% with and without the addition of sufentanil 0.5 microg kg(-1). DESIGN: Prospective, randomized study. SETTING: University teaching hospital. PATIENTS: 40 ASA physical status I pediatric patients, aged one to 7 years, who were scheduled for elective minor subumbilical surgery. INTERVENTIONS: Patients were divided into two groups to receive either a single caudal injection of one mL kg(-1) levobupivacaine 0.20% (Group L) or levobupivacaine 0.20% plus sufentanil 0.5 microg kg(-1) (Group LS). MEASUREMENTS: Analgesia (Children and Infants Postoperative Pain Scale score), motor block (Motor Blockade Scoring), and side effects were assessed at predetermined time points during the first 24 postoperative hours. MAIN RESULTS: The Children and Infants Postoperative Pain Scale scoring at the first hour was significantly lower in Group LS than in Group L. No significant differences were found between the two groups for pain scores at two, three, 4, 5, 6, 9, 12, and 24 hours. Degree of motor block was comparable between the two groups. CONCLUSION: The effect of adding sufentanil to caudal levobupivacaine on postoperative pain scores is brief after elective minor subumbilical surgery in children.

The effect of meperidine-impregnated autogenous free fat grafts on postoperative pain management in lumbar disc surgery.

STUDY DESIGN: Prospective, randomized, double-blind clinical study. OBJECTIVE: To examine the effect of meperidine-impregnated autogenous free fat grafts (AFFGs) on postoperative pain management after 1-level, first-time lumbar disc surgery. SUMMARY OF BACKGROUND DATA: Uncontrolled postoperative pain impedes patient recovery. Insufficient control of postoperative pain makes it difficult to convince new patients to undergo the lumbar disc surgery. METHODS: Twenty-seven patients scheduled to undergo lumbar microdiscectomy for the first time were divided into 2 groups by a randomized double-blind method. Group 1 patients received a meperidine-impregnated AFFG in the epidural area. Group 2 received the graft without meperidine impregnation. Both groups were asked to use a Patient Controlled Analgesia device to deliver tramadol, and at 1, 4, 12, and 24 hours postoperatively, the amounts of tramadol used and pain severity on the 10-cm Visual Analog Scale (VAS) were recorded. RESULTS: The VAS scores and total tramadol use were both lower in group 1 compared with the control group (P<0.05). The first hour of VAS scores were significantly lower in group 1 than in the control group (P<0.05). CONCLUSIONS: In this study, we helped patients, who underwent 1-level, first-time lumbar microdiscectomy have a postoperative pain-free and comfortable period by using epidural meperidine-impregnated AFFGs.

Addition of sufentanil to bupivacaine in caudal block effect on stress responses in children.

BACKGROUND: The aim of the present randomized study was to determine the effect of adding sufentanil to bupivacaine, compared with bupivacaine alone in caudal block, on the surgical stress response in children. METHODS: The children were premedicated with midazolam 0.5 mg/kg. All children received induction with nitrous oxide and sevoflurane. Anesthesia was maintained with the same volatile agents in the both groups. The children were randomly allocated to two groups. Group I received bupivacaine alone (n = 17) and group II received bupivacaine + sufentanil (n = 16). Caudal block was performed with 0.25% bupivacaine 2 mg/kg (group I) or 0.25% bupivacaine 2 mg/kg with sufentanil 0.5 microg/kg (group II) after induction of anesthesia. Blood samples were obtained after induction of anesthesia (T(0)) to measure baseline concentrations of cortisol, prolactin, glucose and insulin. Additional samples were obtained 30 min after the start of surgery (T(1)), and 60 min after the end of surgery (T(2)). RESULTS: All of the basal values (T(0)) were within the normal ranges of the authors' laboratory for children of this age group and there were no differences between the groups (P > 0.05). In both groups, glucose concentration increased at T(1), compared with T(0) and T(2) (P < 0.05). The glucose concentration was unchanged at T(2) compared with T(0) in both group (P > 0.05). In both groups, prolactin concentration increased at T(1), compared with T(0) and decreased at T(2), compared with T(1) (P < 0.05). Cortisol decreased at T(1) and T(2), compared with T(0) in both groups. (P < 0.05). Insulin concentration remained unchanged at T(0) and T(2), but increased slightly at T(1) in both groups (P > 0.05). There were no significant differences in plasma prolactin, cortisol, glucose and insulin levels between the two groups at T(1) and T(2) (P > 0.05). CONCLUSION: There is no advantage in adding 0.5 microg/kg sufentanil to bupivacaine over bupivacaine alone in the caudal block, with regard to the surgical stress response in children.

Prevention of postoperative nausea and vomiting after thyroidectomy: combined antiemetic treatment with dexamethasone and ginger versus dexamethasone alone.

BACKGROUND: The aim of this study was to compare the prophylactic effects of dexamethasone plus ginger and dexamethasone alone on postoperative nausea and vomiting (PONV) in patients undergoing thyroidectomy. METHODS: One hundred and twenty patients undergoing general anaesthesia for thyroidectomy were enrolled in this randomised, double-blind study. Patients received oral diazepam 10mg with either oral placebo (group I) or 0.5g of ginger (group II) as premedication 1 hour prior to surgery. Standard general anaesthetic techniques and postoperative analgesia were employed. Both group I and group II received intravenous dexamethasone 150 microg/kg immediately before the induction of anaesthesia. Data were recorded over a 24-hour observation period after surgery. RESULTS: In the dexamethasone-treated group, 14 patients experienced nausea, two patients retched, three patients vomited once, two patients vomited repeatedly, and 14 patients required a rescue antiemetic. In the dexamethasone-plus-ginger-treated group, 12 patients experienced nausea, one patient retched, four patients vomited once, no patients vomited repeatedly, and 13 patients required a rescue antiemetic. Dexamethasone plus ginger did not significantly reduce nausea and vomiting compared with dexamethasone alone during the observation period. CONCLUSION: In conclusion, the prophylactic combination of antiemetic treatment with dexamethasone and ginger was not clinically or statistically superior to dexamethasone alone in preventing PONV in patients undergoing thyroidectomy.

[Postoperatif agrida deksketoprofen kullanimi]. / Dexketoprofen for postoperative pain relief.

Dexketoprofen trometamol is a water-soluble salt of the dextrorotatory enantiomer of nonsteroidal anti-inflamatory drug ketoprofen. The aim of the study was to investigate the effect of dexketoprofen on postoperative pain. This study was performed on 50 (ASA I-II) patients planned for abdominal hysterectomy. Fifty patients were randomized into two equal groups. Patients received oral placebo (group I) and 25 mg dexketoprofen (group II) 1h before surgery and 8 -16 h after surgery. All patients received a standard anesthetic protocol. At the end of surgery, all patients received tramadol IV via a PCA (Patient Controlled Analgesia) -device. Pain scores and sedation scores were assessed at 3, 6, 12 and 24 h after surgery. Tramadol consumption, adverse effects, and patient satisfaction were noted during 24 h after the surgery. The pain scores were significantly lower in the dexketoprofen group compared with the placebo group (p<0.05). The cumulative tramadol consumption was lower in the dexketoprofen group than placebo group (p<0.05). No significant difference was observed in sedation scores, adverse effects and patient satisfaction between the groups (p>0.05). We conclude that the preoperative and postoperative administration of dexketoprofen provided a significant analgesic benefit and decreased the opioid requirements in patients undergoing abdominal hysterectomy.

Effect of dexmedetomidine on haemodynamic responses to laryngoscopy and intubation : perioperative haemodynamics and anaesthetic requirements.

BACKGROUND: Dexmedetomidine reduces the dose requirements for opioids and anaesthetic agents. The purpose of this study was to evaluate the effect of a single pre-induction intravenous dose of dexmedetomidine 1 microg/kg on cardiovascular response resulting from laryngoscopy and endotracheal intubation, need for anaesthetic agent and perioperative haemodynamic stability. METHODS: Fifty patients scheduled for elective minor surgery were randomised into two groups (dexmedetomidine group and placebo group, n = 25 in each group). During and after drug administration, the Ramsey sedation scale was applied every 5 minutes. Fentanyl 1 microg/kg was administered to all patients and thiopental was given until lash reflex disappeared. Anaesthesia continuation was maintained with 50% : 50%, oxygen : nitrous oxide. Sevoflurane concentration was adjusted to maintain systolic blood pressure within 20% of preoperative values. After extubation, the Steward awakening score was applied at 5 and 10 minutes. Haemodynamic parameters and adverse effects were recorded every 10 minutes for 1 hour after surgery. RESULTS: During intubation the need for thiopental and sevoflurane concentration were decreased by 39% and 92%, respectively, in the dexmedetomidine group compared with the placebo group. In all groups, blood pressure and heart rate increased after tracheal intubation; both were significantly lower in the dexmedetomidine group than in the placebo group (p < 0.05). Fentanyl requirement during the operation was 74.20 +/- 10.53microg in the dexmedetomidine group and 84.00 +/- 27.04microg in the placebo group (p < 0.05). At 5 minutes, the Steward scores were >6 in 56% of the dexmedetomidine group and in 4% of the placebo group (p < 0.05). At 10 minutes, sedation scores were > or =4 in all patients in the dexmedetomidine group (p < 0.05). Arterial blood pressure and heart rate in the postoperative period were significantly lower in the dexmedetomidine group compared with the placebo group (p < 0.05). CONCLUSION: Preoperative administration of a single dose of dexmedetomidine resulted in progressive increases in sedation, blunted the haemodynamic responses during laryngoscopy, and reduced opioid and anaesthetic requirements. Furthermore, dexmedetomidine decreased blood pressure and heart rate as well as the recovery time after the operation.

Effect of caudal block on stress responses in children.

BACKGROUND: The present study was performed during lower abdominal and genitourinary surgery, to assess the effects of caudal block on plasma cortisol, prolactin, insulin and glucose concentrations during and after surgery. METHODS: Thirty male children aged 3-10 years who were scheduled for elective surgery, were selected for the study. The children were premedicated with oral midazolam 0.5 mg/kg. All children received induction with nitrous oxide in oxygen and sevoflurane. The children were randomly allocated into two groups: Group I, control group (n = 15) and group II, caudal group (n = 15). Anesthesia was maintained by face mask with the same agent in both groups. Caudal block was performed with 0.25% bupivacaine 2 mg/kg after induction of anesthesia in the caudal group. Blood samples were obtained after induction of anesthesia (T(0)) in order to measure baseline concentrations of cortisol, prolactin, glucose and insulin. Additional samples were obtained 30 min after the start of surgery (T(1)), and 60 min after the end of surgery (T(2)). RESULTS: All of the basal values (T(0)) were within the normal ranges accepted by Meram Medical Faculty of Selcuk University for children of this age group and there were no differences between the groups (P > 0.05). In both groups, glucose concentration increased at T(1), compared with T(0) and T(2) values (P < 0.05). However glucose concentration was lower in the caudal group than in the control group at T(1) (P < 0.05). In both groups, prolactin concentration increased at T(1), compared with T(0) (P < 0.05). The mean plasma prolactin and cortisol concentration were lower in the caudal group than the control group at T(1) and T(2) (P < 0.05). The mean insulin concentration was lower in the caudal group than the control group at T(2) (P < 0.05). CONCLUSION: These results indicate that caudal anesthesia suppresses the metabolic and endocrine responses to stress associated with lower abdominal and genitourinary surgery in children.