Amitriptyline inhibits the MAPK/ERK and CREB pathways and proinflammatory cytokines through A3AR activation in rat neuropathic pain models / 대한마취과학회지

BACKGROUND: The pain-relief properties of tricyclic antidepressants can be attributed to several actions. Recent observations suggest that adenosine is involved in the antinociceptive effect of amitriptyline. The A3 adenosine receptor (A3AR) is the only adenosine subtype overexpressed in inflammatory and cancer cells. This study was performed to investigate the role of A3AR in the anti-nociceptive effect of amitriptyline. METHODS: Spinal nerve-ligated neuropathic pain was induced by ligating the L5 and L6 spinal nerves of male Sprague-Dawley rats. The neuropathic rats were randomly assigned to one of the following three groups (8 per group): a neuropathic pain with normal saline group, a neuropathic pain with amitriptyline group, and a neuropathic pain with amitriptyline and 3-ethyl-5-benzyl- 2-methyl-4-phenylethynyl-6-phenyl-1,4-(±)-dihydropyridine-3,5-dicarboxylate (MRS) group. Amitriptyline or saline was administered intraperitoneally and 3-ethyl-5-benzyl-2-methyl-4-phenylethynyl-6-phenyl-1,4-(±)-dihydropyridine-3,5-dicarboxylate (MRS-1191), an A3AR antagonist, was injected subcutaneously immediately before amitriptyline administration. The level of extracellular signal-regulated kinase P44/42 (ERK1/2), cyclic AMP response element-binding protein (CREB), and proinflammatory cytokines were assessed using immunoblotting or reverse-transciption polymerase chain reaction. RESULTS: Amitriptyline increased the mechanical withdrawal threshold of the neuropathic rats. The level of phospho-ERK1/2 and phospho-CREB proteins, and proinflammatory cytokines produced by spinal nerve ligation were significantly reduced by amitriptyline administration. However, the use of MRS-1191 before amitriptyline administration not only reduced the threshold of mechanical allodynia, but also increased the signaling protein and proinflammatory cytokine levels, which were reduced by amitriptyline. CONCLUSIONS: The results of this study suggest that the anti-nociceptive effect of amitriptyline involves the suppression of ERK1/2 and CREB signaling proteins, and A3AR activation also affects the alleviation of the inflammatory response.

Amitriptyline inhibits the MAPK/ERK and CREB pathways and proinflammatory cytokines through A3AR activation in rat neuropathic pain models / 대한마취과학회지

BACKGROUND@#The pain-relief properties of tricyclic antidepressants can be attributed to several actions. Recent observations suggest that adenosine is involved in the antinociceptive effect of amitriptyline. The A3 adenosine receptor (A3AR) is the only adenosine subtype overexpressed in inflammatory and cancer cells. This study was performed to investigate the role of A3AR in the anti-nociceptive effect of amitriptyline.@*METHODS@#Spinal nerve-ligated neuropathic pain was induced by ligating the L5 and L6 spinal nerves of male Sprague-Dawley rats. The neuropathic rats were randomly assigned to one of the following three groups (8 per group): a neuropathic pain with normal saline group, a neuropathic pain with amitriptyline group, and a neuropathic pain with amitriptyline and 3-ethyl-5-benzyl- 2-methyl-4-phenylethynyl-6-phenyl-1,4-(±)-dihydropyridine-3,5-dicarboxylate (MRS) group. Amitriptyline or saline was administered intraperitoneally and 3-ethyl-5-benzyl-2-methyl-4-phenylethynyl-6-phenyl-1,4-(±)-dihydropyridine-3,5-dicarboxylate (MRS-1191), an A3AR antagonist, was injected subcutaneously immediately before amitriptyline administration. The level of extracellular signal-regulated kinase P44/42 (ERK1/2), cyclic AMP response element-binding protein (CREB), and proinflammatory cytokines were assessed using immunoblotting or reverse-transciption polymerase chain reaction.@*RESULTS@#Amitriptyline increased the mechanical withdrawal threshold of the neuropathic rats. The level of phospho-ERK1/2 and phospho-CREB proteins, and proinflammatory cytokines produced by spinal nerve ligation were significantly reduced by amitriptyline administration. However, the use of MRS-1191 before amitriptyline administration not only reduced the threshold of mechanical allodynia, but also increased the signaling protein and proinflammatory cytokine levels, which were reduced by amitriptyline.@*CONCLUSIONS@#The results of this study suggest that the anti-nociceptive effect of amitriptyline involves the suppression of ERK1/2 and CREB signaling proteins, and A3AR activation also affects the alleviation of the inflammatory response.

Effects of Dexmedetomidine Infusion on the Recovery Profiles of Patients Undergoing Transurethral Resection

Transurethral resection has been the gold standard in the operative management of benign prostatic hyperplasia and bladder tumor; however, it is associated with several complications that may cause patient discomfort. We evaluated the usefulness of continuous infusion of dexmedetomidine on emergence agitation, hemodynamic status, and recovery profiles in patients undergoing elective surgery by a randomized clinical trial. Sixty patients aged 30 to 80 yr who were scheduled for elective transurethral resection under general anesthesia were included in this study. Participants were randomly assigned to two groups (control group, group C; dexmedetomidine group, group D). A total of 60 male patients were enrolled in this study and randomly assigned to group C (n=30) or group D (n=30). The quality of emergence in group D was marked by a significantly lower incidence of emergence agitation than in group C (P=0.015). Patients in group D therefore felt less discomfort induced by the indwelling Foley catheter than those in group C (P=0.022). No statistically significant differences were found between the two groups with respect to side effects including bradycardia (P=0.085), hypotension (P=0.640), and postoperative nausea and vomiting (P=0.389). Our study showed that intraoperative dexmedetomidine infusion effectively reduced the incidence and intensity of emergence agitation and catheter-induced bladder discomfort without delaying recovery time and discharge time, thus providing smooth emergence during the recovery period in patients undergoing transurethral resection (Clinical Trial Registry No. KT0001683).

Comparison of an Intraoperative Infusion of Dexmedetomidine, Fentanyl, and Remifentanil on Perioperative Hemodynamics, Sedation Quality, and Postoperative Pain Control

We aimed to compare fentanyl, remifentanil and dexmedetomidine with respect to hemodynamic stability, postoperative pain control and achievement of sedation at the postanesthetic care unit (PACU). In this randomized double-blind study, 90 consecutive total laparoscopic hysterectomy patients scheduled for elective surgery were randomly assigned to receive fentanyl (1.0 µg/kg) over 1 minute followed by a 0.4 µg/kg/hr infusion (FK group, n = 30), or remifentanil (1.0 µg/kg) over 1 minute followed by a 0.08 µg/kg/min infusion (RK group, n = 30), or dexmedetomidine (1 µg/kg) over 10 minutes followed by a 0.5 µg/kg/hr infusion (DK group, n = 30) initiating at the end of main procedures of the operation to the time in the PACU. A single dose of intravenous ketorolac (30 mg) was given to all patients at the end of surgery. We respectively evaluated the pain VAS scores, the modified OAA/S scores, the BIS, the vital signs and the perioperative side effects to compare the efficacy of fentanyl, remifentanil and dexmedetomidine. Compared with other groups, the modified OAA/S scores were significantly lower in DK group at 0, 5 and 10 minutes after arrival at the PACU (P < 0.05), whereas the pain VAS and BIS were not significantly different from other groups. The blood pressure and heart rate in the DK group were significantly lower than those of other groups at the PACU (P < 0.05). DK group, at sedative doses, had the better postoperative hemodynamic stability than RK group or FK group and demonstrated a similar effect of pain control as RK group and FK group with patient awareness during sedation in the PACU. (World Health Organization registry, KCT0001524).

Aminophylline Partially Prevents the Decrease of Body Temperature during Laparoscopic Abdominal Surgery

Aminophylline can elicit thermogenesis in rats or increase metabolic rate during cold stress in lambs. We tested the hypothesis that aminophylline would reduce the change in core body temperature during laparoscopic abdominal surgery requiring pneumoperitoneum. Fifty patients were randomly divided into an aminophylline group (n=25) and a saline control group (n=25). Esophageal temperature, index finger temperature, and hemodynamic variables, such as mean blood pressure and heart rate, were measured every 15 min during sevoflurane anesthesia. In the aminophylline group, esophageal temperatures at T45 (36.1+/-0.38 vs. 35.7+/-0.29, P=0.024), T60 (36.0+/-0.39 vs. 35.6+/-0.28, P=0.053), T75 (35.9+/-0.34 vs. 35.5+/-0.28, P=0.025), T90 (35.8+/-0.35 vs. 35.3+/-0.33, P=0.011), and T105 (35.8+/-0.36 vs. 35.1+/-0.53, P=0.017) and index finger temperatures at T15 (35.8+/-0.46 vs. 34.9+/-0.33, P<0.001), T30 (35.7+/-0.36 vs. 35.0+/-0.58, P=0.029), T45 (35.8+/-0.34 vs. 35.2+/-0.42, P=0.020), T60 (35.7+/-0.33 vs. 34.9+/-0.47, P=0.010), T75 (35.6+/-0.36 vs. 34.8+/-0.67, P=0.028), T90 (35.4+/-0.55 vs. 34.4+/-0.89, P=0.042), and T105 (34.9+/-0.53 vs. 33.9+/-0.85, P=0.024) were significantly higher than in the saline control group. Aminophylline is effective in maintaining the core temperature through a thermogenic effect, despite reduced peripheral thermoregulatory vasoconstriction.

Aminophylline Partially Prevents the Decrease of Body Temperature during Laparoscopic Abdominal Surgery

Aminophylline can elicit thermogenesis in rats or increase metabolic rate during cold stress in lambs. We tested the hypothesis that aminophylline would reduce the change in core body temperature during laparoscopic abdominal surgery requiring pneumoperitoneum. Fifty patients were randomly divided into an aminophylline group (n=25) and a saline control group (n=25). Esophageal temperature, index finger temperature, and hemodynamic variables, such as mean blood pressure and heart rate, were measured every 15 min during sevoflurane anesthesia. In the aminophylline group, esophageal temperatures at T45 (36.1+/-0.38 vs. 35.7+/-0.29, P=0.024), T60 (36.0+/-0.39 vs. 35.6+/-0.28, P=0.053), T75 (35.9+/-0.34 vs. 35.5+/-0.28, P=0.025), T90 (35.8+/-0.35 vs. 35.3+/-0.33, P=0.011), and T105 (35.8+/-0.36 vs. 35.1+/-0.53, P=0.017) and index finger temperatures at T15 (35.8+/-0.46 vs. 34.9+/-0.33, P<0.001), T30 (35.7+/-0.36 vs. 35.0+/-0.58, P=0.029), T45 (35.8+/-0.34 vs. 35.2+/-0.42, P=0.020), T60 (35.7+/-0.33 vs. 34.9+/-0.47, P=0.010), T75 (35.6+/-0.36 vs. 34.8+/-0.67, P=0.028), T90 (35.4+/-0.55 vs. 34.4+/-0.89, P=0.042), and T105 (34.9+/-0.53 vs. 33.9+/-0.85, P=0.024) were significantly higher than in the saline control group. Aminophylline is effective in maintaining the core temperature through a thermogenic effect, despite reduced peripheral thermoregulatory vasoconstriction.

Effect of milrinone on the inflammatory response and NF-kB activation in renal ischemia-reperfusion injury in mice / 대한마취과학회지

BACKGROUND: Milrinone increases intracellular adenosine 3',5'-cyclic monophosphate concentration and enhances vascular relaxation. Nuclear factor-kappa B (NF-kB) plays a key role in inflammatory responses during ischemia-reperfusion (I/R) injury. We aimed to investigate the effect of milrinone on the inflammatory responses and NF-kB activation in renal I/R injury in mice. METHODS: Thirty C57BL/6 mice were allocated into 3 groups. In group S (n = 10), only right nephrectomy was done. In group C (n = 10), the left kidney was subjected to 30 min of ischemia after right nephrectomy. In group M (n = 10), milrinone (5 microg/kg) was administered before ischemia. After 24 hours of reperfusion, the serum creatinine was measured, kidney samples were obtained for histology, and expressions of NF-kB and proinflammatory cytokines were analyzed. RESULTS: In group C, the serum creatinine concentration was markedly elevated, compared with group S. Creatinine concentration in group M was also elevated, but it was significantly lower than that in group C. Histologic evidence of renal damage was severe in group C, but it was improved in group M. In groups C and M, expression of NF-kB, tumor necrosis factor-alpha (TNF-alpha), intercellular adhesion molecule-1 (ICAM-1), monocyte chemoattractant protein-1 (MCP-1) and macrophage inflammatory protein-2 (MIP-2) mRNA increased significantly compared with group S (P < 0.05). But group M showed a lower expression of NF-kB, TNF-alpha, ICAM-1, MCP-1 and MIP-2 mRNA than group C (P < 0.05). CONCLUSIONS: Milrinone treatment attenuates the renal inflammatory response and activation of NF-kB, resulting in improvement of renal function and tissue injury.

The comparison of sedation quality, side effect and recovery profiles on different dosage of remifentanil patient-controlled sedation during breast biopsy surgery / 대한마취과학회지

BACKGROUND: The patient-controlled sedation (PCS) allows for rapid individualized titration of sedative drugs. Propofol has been the most widely used IV adjuvant, during the monitored anesthesia care (MAC). This study was designed to compare the sedation quality, side effect and recovery of the propofol alone, and propofol-remifentanil combination, using PCS for breast biopsy. METHODS: Seventy five outpatients, undergoing breast biopsy procedures with local anesthesia, were randomly assigned to receive propofol alone (group P), propofol-25 ug/ml of remifentanil (group PR25), and propofol-50 ug/ml of remifentanil (group PR50), using PCS. Pain visual analogue scores (VAS) and digit symbol substitution test (DSST), Vital signs, bi-spectral index (BIS) and observer assessment of alertness and sedation (OAA/S) score were recorded. RESULTS: Apply/Demand ratio in the group PR50 had a significant increase over the other groups (P < 0.05). The incidence of excessive sedation and dizziness were significantly more frequent in the group PR50 (P < 0.05). BIS and OAA/S score significantly decreased in the group PR25, PR50 at 15 min after the operation, the end of surgery (P < 0.05). At 5 min after the start of PCS, patients in the group PR25 and PR50 gave significantly less correct responses on the DSST than that of the group P (P < 0.05). CONCLUSIONS: Compared with the propofol alone, intermittent bolus injection of propofol-remifentanil mixture could be used, appropriately, for the sedation and analgesia during MAC. The group PR25 in a low dose of remifentanil has more advantages in terms of sedation and satisfaction because of the group PR50's side effects.

Hepatic Ischemic Preconditioning Provides Protection Against Distant Renal Ischemia and Reperfusion Injury in Mice

We previously demonstrated that there are acute and delayed phases of renal protection against renal ischemia and reperfusion (IR) injury with renal ischemic preconditioning (IPC). This study assessed whether hepatic IPC could also reduce distant renal IR injury through the blood stream-mediated supply of reactive oxygen species (ROS). Male C57BL/6 mice were randomly divided into four groups: group I, sham operated including right nephrectomy; group II (IR), left renal ischemia for 30 min and reperfusion injury; group III (IPC-IR), hepatic ischemia for 10 min followed by 10 min of reperfusion before left renal IR injury; group IV (MPG - IPC + IR), pretreated with 100 mg/kg N-(2-mercaptopropionyl)-glycine (MPG) 15 min before hepatic IPC and left renal IR injury. Renal function, histopathologic findings, proinflammatory cytokines, and cytoprotective proteins were evaluated 15 min or 24 hr after reperfusion. Hepatic IPC attenuated the expression of proinflammatory cytokines, tumor necrosis factor alpha, intercellular adhesion molecule 1, and induced inducible nitric-oxide synthase, and the phosphorylation of Akt in the murine kidney. Renal function was better preserved in mice with hepatic IPC (group III) than groups II or IV. Hepatic IPC protects against distant renal IR injury through the blood stream-delivery of hepatic IPC-induced ROS, by inducing cytoprotective proteins, and by inhibiting inflammatory reactions.

Comparison of an intraoperative infusion of dexmedetomidine or fentanyl for the perioperative hemodynamics, achieving hypnosis and sedation, and the postoperative pain control

BACKGROUND: The aim of this study was to compare dexmedetomidine (DEX), which is a selective, short-acting, central alpha2-adrenergic agonist, with fentanyl in terms of the hemodynamic stability, achieving hypnosis and sedation, and the postoperative pain control at the PACU (postanesthetic care unit). METHODS: In this double-blind study, 50 consecutive total laparoscopic hysterectomy patients scheduled for elective surgery were randomly assigned to receive either dexmedetomidine 1 microg/kg over 10 min followed by a 0.5 microg/kg/hr infusion (the DK group) or fentanyl 0.8-1.2 microg/kg over 1 min followed by a 0.2-0.6 microg/kg/hr infusion (the FK group) from the time of ending the operation after total hysterectomy to the time in the PACU. We evaluated the pain VAS scores, the modified OAA/S scores, the BIS, the vital signs, the respiratory variables (SpO2, RR and EtCO2) and the perioperative side effects to compare the efficacy of dexmedetomidine and fentanyl. RESULTS: Compared with the fentanyl-ketorolac (FK) group, the modified OAA/S scores were significantly lower in the dexmedetomine-ketorolac (DK) group at 0, 5 and 10 min after arrival at the PACU (P < 0.05), whereas the pain VAS and BIS were not significantly different between the two groups. The blood pressure and heart rate in the DK group was significantly lower than that of the FK group at the PACU (P < 0.05). CONCLUSIONS: The DK group, at the doses used in this study, has a significant advantage over the FK group in terms of the postoperative hemodynamic stability at the PACU. There was no significant difference between the two groups for the postoperative pain control.

Comparison of an intraoperative infusion of dexmedetomidine or fentanyl for the perioperative hemodynamics, achieving hypnosis and sedation, and the postoperative pain control

BACKGROUND: The aim of this study was to compare dexmedetomidine (DEX), which is a selective, short-acting, central alpha2-adrenergic agonist, with fentanyl in terms of the hemodynamic stability, achieving hypnosis and sedation, and the postoperative pain control at the PACU (postanesthetic care unit). METHODS: In this double-blind study, 50 consecutive total laparoscopic hysterectomy patients scheduled for elective surgery were randomly assigned to receive either dexmedetomidine 1 microg/kg over 10 min followed by a 0.5 microg/kg/hr infusion (the DK group) or fentanyl 0.8-1.2 microg/kg over 1 min followed by a 0.2-0.6 microg/kg/hr infusion (the FK group) from the time of ending the operation after total hysterectomy to the time in the PACU. We evaluated the pain VAS scores, the modified OAA/S scores, the BIS, the vital signs, the respiratory variables (SpO2, RR and EtCO2) and the perioperative side effects to compare the efficacy of dexmedetomidine and fentanyl. RESULTS: Compared with the fentanyl-ketorolac (FK) group, the modified OAA/S scores were significantly lower in the dexmedetomine-ketorolac (DK) group at 0, 5 and 10 min after arrival at the PACU (P < 0.05), whereas the pain VAS and BIS were not significantly different between the two groups. The blood pressure and heart rate in the DK group was significantly lower than that of the FK group at the PACU (P < 0.05). CONCLUSIONS: The DK group, at the doses used in this study, has a significant advantage over the FK group in terms of the postoperative hemodynamic stability at the PACU. There was no significant difference between the two groups for the postoperative pain control.

Severe hypotension and water intoxication developed after an accidental oxytocin overdose in a morbidly obese patient undergoing cesarean section: A case report / 대한마취과학회지

We present a 32-year-old, extremely obese, pregnant woman who developed severe hypotension and water intoxication after an accidental injection of large bolus of oxytocin during cesarean section under general anesthesia. The patient was initially thought to have an amniotic fluid embolism because of the abrupt hemodynamic changes developed immediately after fetal delivery and lack of recognition of medication error. It is highly recommended that careful attention should be paid not only to the possibility of hemodynamic deterioration and water intoxication if oxytocin is given rapidly in excessive doses, but to the confirmation of the proper use of the drug before it is injected.

Rumpel-Leede phenomenon associated with noninvasive blood pressure monitoring: A case report / 대한마취과학회지

We report a case of Rumpel-Leede (RL) phenomenon, - acute dermis capillary rupture, secondary to noninvasive blood pressure (NIBP) monitoring in a patient with type 2 diabetes mellitus (DM) and hypertension. The first most likely cause is vascular fragility in microangiopathy as a result of DM and chronic steroid use. The second is the increased venous pressure during cycling of the blood pressure cuff in a hypertensive state. Anesthesiologists need to be aware that acute dermal capillary rupture, although rare, can occur in patients with long-standing DM, hypertension and chronic steroid use.

Atelectasis of Dependent Lungs during Fistula Closure in a Patient with Tracheopleural Fistula: A Case Report / 대한구급학회지

Atelectasis is a fairly common complication in patients undergoing general anesthesia. However, atelectasis caused secretion plugs in patients with tracheopleural fistula is less common than other airway fistulas such as trachea and bronchus. Anesthesiologists should make every effort for thorough preoperative preparation to prevent atelectasis and using appropriate and aggressive treatment, including tracheal or bronchial clearing and end expiratory positive pressure. We report a case of an intraoperative occurrence of atelectasis of the lower lobe of a dependent lung in a patient with a tracheopleural fistula during single lung ventilation for primary closure.

Lidocaine attenuates the expression of ERK1/2 and CREB in a neuropathic pain model of rats / 대한마취과학회지

BACKGROUND: In addition to causing the loss of voluntary sensory and motor function, spinal cord injury (SCI) often creates a state of central neuropathic pain. Rats given SCI display increases in the activated form of transcription factors ERK 1/2, p38 MAPK, and CREB in the spinal cord, which correspond to allodynia in a model of neuropathic pain. The current study was designed to determine if lidocaine had an effect on the development of neuropathic pain in response to SCI. METHODS: Male Sprague Dawley rats were anesthetized and then received a L5-L6 spinal nerve ligation (neuropathic rats). The levels of intracellular cell-signaling protein, ERK 1/2 and CREB were then assessed by western blot analysis of samples collected from a sham operated (control) group, a neuropathic pain and normal saline (NP + NS) group, and a neuropathic pain and 5% lidocaine (NP + Lido) group. RESULTS: The increased levels of ERK 1/2 and CREB protein that were observed in the neuropathic pain model were reduced by continuous infusion of 5% lidocaine. CONCLUSIONS: The current results suggest that lidocaine therapy may be an effective method of preventing and treating central neuropathic pain following SCI, and that these effects may occur via the reduced expression of ERK 1/2 and CREB in the intracellular cell-signaling pathway.

Low dose ketamine reduces the induction of ERK1/2 and CREB signaling protein in a neuropathic pain model of rats / 대한마취과학회지

BACKGROUND: In addition to causing the loss of voluntary sensory and motor function, spinal cord injury (SCI) often creates a state of central neuropathic pain. Rats given SCI display increases in the activated form of transcription factors ERK 1/2 MAPK and CREB in the spinal cord, which correspond to allodynia in a model of neuropathic pain. This study was conducted to determine if low dose ketamine had an effect on the activation of ERK 1/2 and CREB in the development of neuropathic pain. METHODS: This study was conducted to evaluate ERK 1/2 and CREB protein in a sham operated (control) group, neuropathic pain and normal saline (NP + NS) group and neuropathic pain and ketamine (NP + Keta) group. To accomplish this, male Sprague-Dawley rats were anesthetized and then subjected to L5-L6 spinal nerve ligation (SNL, neuropathic rats). The total amounts of ERK 1/2 and CREB protein were then assessed by western blot analysis. In addition, changes in the amounts of ERK 1/2 and CREB mRNA were evaluated by RT-PCR. RESULTS: There was a significant increase in the amount of ERK 1/2 and CREB in the NP + NS group when compared with the sham group. However, the amount of ERK 1/2 and CREB protein induced due to SNL were significantly reduced by continuous infusion with ketamine in the NP + Keta group. CONCLUSIONS: The results of this study revealed a positive linkage between NMDA receptors and the ERK-CREB signaling pathway. Therefore, NMDA receptors could be the target of future therapeutic approaches. Additionally, the results of the present study provide additional evidence that low dose ketamine effectively prevents and treats central neuropathic pain following SNL.

Intraoperative anaphylaxis after local infiltration of lidocaine for dental treatment under general anesthesia: A case report / 대한마취과학회지

Anaphylaxis or anaphylactoid reactions rarely occur during the perioperative period but can be a devastating complication of general anesthesia. We experienced a patient with an unexpected anaphylaxis. A 11-yr-old boy was scheduled for extraction and treatment of caries under general anesthesia. Ketamine, thiopental sodium and rocuronium were used for induction of anesthesia. After induction lidocaine was injected through oral mucosa for pretreatment. About 3 minutes later hypotension, tachycardia, bronchoconstriction and reddish skin eruptions developed. The operation was put off and skin prick test for screening the contributing drug was performed. Lidocaine reacted positively to the test. Based upon the result, second operation could be performed safely and successfully without using lidocaine.

Intraoperative anaphylaxis after local infiltration of lidocaine for dental treatment under general anesthesia: A case report / 대한마취과학회지

Anaphylaxis or anaphylactoid reactions rarely occur during the perioperative period but can be a devastating complication of general anesthesia. We experienced a patient with an unexpected anaphylaxis. A 11-yr-old boy was scheduled for extraction and treatment of caries under general anesthesia. Ketamine, thiopental sodium and rocuronium were used for induction of anesthesia. After induction lidocaine was injected through oral mucosa for pretreatment. About 3 minutes later hypotension, tachycardia, bronchoconstriction and reddish skin eruptions developed. The operation was put off and skin prick test for screening the contributing drug was performed. Lidocaine reacted positively to the test. Based upon the result, second operation could be performed safely and successfully without using lidocaine.

Postoperative Pain Control using Intravenous Patient Controlled Analgesia in Cesarean Section and Hysterectomy / 대한마취과학회지

BACKGROUND: Postoperative pain degree is variable according to the site, type, and method of operation. This study compared the pain degree and amount of analgesics required among 3 types of operation. METHODS: Ninety patients were selected that cesarean section (Group I, n = 30), open total hysterectomy (Group II, n = 30), laparoscopic total hysterectomy (Group III, n = 30) were scheduled. Patients received PCA with basal rate 2 ml/h, bolus 1 ml, lockout interval 5 min using fentanyl and ketorolac. We evaluated VAS at 30 min, 2, 6, 12, 18, 24, 36, 48 h postoperatively, demand of button and attempt of button, 6 hourly used amount of analgesics; side effects and degree of satisfaction after 24, 48 h postoperatively. RESULTS: The rest VAS decreased below 30 at 6 hr in group I & II and at 2 hr in group III. More analgesics were needed for the first 6 hr compared with remained time in 3 groups (group I vs. group II vs. group III, P < 0.05). Total amount of analgesics including loading dose were fentanyl 1,536 +/- 342microgram, ketorolac 167 +/- 34 mg for group I; 1,212 +/- 215microgram, 132 +/- 30 mg for group II; 866 +/- 125microgram, 97 +/- 27 mg for group III (group I vs. group II vs. group III, P < 0.05). CONCLUSIONS: The postoperative pain was painful as order of cesarean section, open total hysterectomy, and laparoscopic total hysterectomy. The pain was reduced 6 hr in laparotomy and 2 h in laparoscopy.

Does the Stellate Ganglion Block Decrease the Postoperative Sore Throat?

BACKGROUND: Decreased circulation of the tracheal mucosa caused by high intracuff pressure of endotracheal tube is responsible for increased incidence of postoperative sore throat. Stellate ganglion block (SGB) can improve the circulation of head and neck and upper extremities and affects postoperative sore throat. METHODS: Sixty female patients were randomly assigned to get unilateral SGB with 1% lidocaine (group I) or saline (group II). Intracuff pressures of endotracheal tube of all patients were maintained at around 50 mmHg during anesthesia. The frequency of sore throat and hoarseness, the severity of sore throat were estimated at arrival of recovery room and 6, 24, 48 hours after extubation. RESULTS: The incidence of sore throat was significant lower at only 6 hours after extubation in the Group I (P <0.05) than in Group II. There were no significant differences of the incidence of hoarseness or severity of sore throat between two groups. CONCLUSIONS: There was statistical significance of the incidence of postoperative sore throat in the SGB patients at 6 hours after extubation. However it may not be possible to alleviate the severity of sore throat with SGB.