A 50 year-old woman was scheduled for clipping of giant middle cerebral artery (MCA) aneurysm. Preoperative four-vessel angiography and computed tomography scan revealed a giant aneurysm (3.5x3.3x3.5 cm) at bifurcation of right MCA. Induced hypotension and brain protection using sodium nitroprusside (SNP) and thiopental loading were planned to prevent cerebral damage during the operation. Before induction, esmolol, lidocaine and vecuronium were administered. Mask ventilation with isoflurane in N2O and O2 was performed over 5 minutes and then tracheal intubation was done. Anesthesia was maintained by isoflurane+N2O+O2 with pancuronium. Electrocardiography, pulse oxymetry, capnography, central venous pressure, evoked potential and invasive arterial blood pressure were monitored. She was hyperventilated intraoperatively with a PaCO2 around 30 mmHg. Perioperative hypotension was achieved with infusion of SNP (0.3~1.0 microg/kg/min). During the actual aneurysm surgery, mean arterial pressure was lowered to approximately 50 mmHg. Adjuvant drugs such as methylprednisolone, mannitol and furosemide to reduce intracranial pressure were also administered. This technique established good brain conditions during clipping of the aneurysm. A thiopental loading (4 mg/kg) was supplied while the aneurysm was approached. Satisfactory and well-controlled hypotension was obtained after thiopental and SNP. Postoperatively, the patient was transferred to the intensive care unit.
Anesthesia ; Aneurysm ; Angiography ; Arterial Pressure ; Brain ; Capnography ; Central Venous Pressure ; Electrocardiography ; Evoked Potentials ; Female ; Furosemide ; Humans ; Hypotension ; Intensive Care Units ; Intracranial Aneurysm* ; Intracranial Pressure ; Intubation ; Isoflurane ; Lidocaine ; Mannitol ; Masks ; Methylprednisolone ; Middle Cerebral Artery ; Nitroprusside ; Pancuronium ; Thiopental ; Vecuronium Bromide ; Ventilation

BACKGROUND: Elecroconvulsive therapy (ECT) is frequently associated with cardiovascular complications such as hypertension and tachycardia. The aim of this study was to evaluate whether clonidine given as an oral preanesthetic medication would influence the hemodynamic stress response, peripheral oxygen saturation and seizure duration which follows ECT. METHODS: Twenty-two ASA physical status I, II patients with major depressive disorders were included in a crossover study design and assigned randomly to either a control group who received placebo, or a clonidine group who received oral clonidine of 3 microgram/kg 90 min before preparation of ECT. All patients received glycopyrrolate 0.2 mg intramuscularly 60 min before anesthetic induction. Electrocardiography, pulse oximetry, and blood pressure monitors were applied to all patients. Patients were pre-oxygenated with 100% O2. Patients received thiopental 2.5 mg/kg and succinylcholine 0.5 mg/kg for anesthetic induction. Noninvasive mean arterial blood pressure (MAP), heart rate, and oxygen saturation were recorded just before test drug administration, immediately before ECT, and each minute for five minutes after ECT. The times from ECT stimulus to the cessation of clonic-tonic motor activity in the "isolated" arm were noted. RESULTS: There was a significant decrease in MAP (P = 0.007) through the peri-ECT period in groups with oral clonidine pretreatment (3 microgram/kg) relative to the control group. There were no significant differences in heart rate and peripheral oxygen saturation values between two groups. The duration of motor seizure activity was similar between the clonidine pretreatment and placebo groups. CONCLUSIONS: We conclude that oral clonidine 3 microgram/kg as a pretreatment medication is effective in attenuating the MAP increase in routine ECT.
Arm ; Arterial Pressure ; Blood Pressure Monitors ; Clonidine* ; Cross-Over Studies ; Depressive Disorder, Major ; Electrocardiography ; Electroconvulsive Therapy* ; Glycopyrrolate ; Heart Rate ; Hemodynamics ; Humans ; Hypertension ; Motor Activity ; Oximetry ; Oxygen ; Preanesthetic Medication ; Seizures* ; Succinylcholine ; Tachycardia ; Thiopental

BACKGOUND: We evaluated the effect of intravenous lidocaine (1 mg/kg and 2 mg/kg) on intra-abdominal pressure (IAP) during endotracheal suctioning. METHODS: We studied 40 patients undergoing endotracheal intubation during mechanical ventilation. Group I (1 mg/kg) and group II (2 mg/kg)were given lidocaine double fashion. The endotracheal suctioning (ETS) was done 1, 3, 5 and 7 min after the injection of lidocaine. IAP, systolic blood pressure (SBP), diastolic blood preassure (DBP), and heart rate (HR) during ETS were recorded, IAP was measured using a transurethral bladder catheters. The cough response to ETS was classified as " cough score". RESULTS: Before administration of lidocaine, ETS produced significant increase in SBP, DBP, IAP and HR compared with baseline values in the two groups (p<0.05). Both groups showed no significant changes in SBP, DBP, and HR during the study. In group I, ETS produced a significant increase in IAP 5 and 7min after lidocaine treatment (p<0.05). There were significant differences between the two groups 5 and 7 min after lidocaine treatment (p<0.05). The score of cough decreased significantly in both groups 3 min after lidocaine treatment but there was a significant difference between the two groups at 7 min. CONCLUSIONS: We concluded that lidocaine pretreatment significantly blunted the increase in IAP, SBP DBP and HR caused by ETS and this effect lasts for 3 min in group I and 7 min in group II.
Anesthetics ; Blood Pressure ; Catheters ; Cough ; Heart Rate ; Humans ; Intubation, Intratracheal ; Lidocaine* ; Respiration, Artificial ; Suction* ; Trachea ; Urinary Bladder

BACKGROUND: Incorrect infusion of dopamine can be potentially life threatening. If the actual volume of a 100 ml intravenous bag or bottle used to mix dopamine solutions is greater than the labeled volume, overdilution of dopamine can occur, resulting in ineffective hemodynamic response. To determine the significance of dopamine overdilution induced by the excessive volume, dopamine concentration and hemodynamic effect were compared in the manually mixed dopamine and the manufactured premixed dopamine. METHODS: For 5% dextrose water (D5W) 100 ml intravenous bottle mixed with 160 mg (4 ml) of dopamine (group 1), D5W 96 ml mixed with 160 mg of dopamine (group 2), premixed dopamine with 1.6 mg/ml of concentration manufactured 2 months ago (group 3), premixed dopamine with 1.6 mg/ml of concentration manufactured 6 months ago (group 4), and D5W 100 ml intravenous bottle mixed with 160 mg (4 ml) of dopamine after removal of 4 ml dextrose water (group 5), dopamine concentration was measured by High performance liquid chromatography (HPLC). Hemodynamic data was obtained from 10 mongrel dogs for each group at baseline (T1), 15 minutes after dopamine infusion at a rate of 3 microgram/kg/min (T2), 8 microgram/kg/min (T3), and 15 microgram/kg/min (T4). RESULTS: Dopamine concentrations of group 1, 2, 3, 4, and 5 were 1.51+/- 0.09, 1.60 +/- 0.10, 1.63 +/- 0.06, 1.57+/- 0.08 and 1.57+/- 0.07 mg/ml, respectively. Group 1 showed a significantly low concentration (p< 0.05). There was no significant differences in all hemodynamic data between group 1, 2, 3, and 4. In group 1, however, there was no significant increase in both mean blood pressure at T4 and mixed venous oxygen saturation at T3 compared with T1. CONCLUSIONS: The actual volume of D5W in 100 ml intravenous bottle is greater than the labeled, and therefore can cause significant overdilution of dopamine. Premixed dopamine, however, has the same concentration and hemodynamic effects as the dopamine mixed manually but precisely.
Animals ; Blood Pressure ; Chromatography, Liquid ; Dogs ; Dopamine* ; Glucose ; Hemodynamics* ; Oxygen ; Water

No abstract available.

BACKGROUND: The bispectral index (BIS) has been used as an indicator of sedative state and has been considered to be related to anesthetic agents and noxious stimulus. In this study, we measured BIS, blood pressure (BP) and heart rate (HR) during induction of anesthesia (IA) with propofol, with and without midazolam pretreatment. METHODS: A study design was used in 20 ASA physical status 1 and 2 patients aged from 18 to 60 years undergoing short (2 h) operation times. In the control group (group 1, n = 10), propofol 12 mg/kg/h was infused continuously after propofol 2 mg/kg as an intravenous bolus for IA preceded by normal saline. In group 2 (n = 10), propofol 12 mg/kg/h was infused continuously after half-strength propofol 1 mg/kg as an intravenous bolus for IA preceded by 0.1 mg/kg midazolam 2 min before. Patients received intravenous propofol for IA over 40 seconds. During the infusion, vecuronium (0.15 mg/kg) was given 3 5 min before intubation. The assistant and controlled ventilation were maintained with 100% oxygen over 5 min, and continued until BIS decreased to 40 and intubation was called for. The BIS, BP and HR were measured 2 min after midazolam or normal saline infusion, 3 5 min after propofol with vecuronium and 1, 3 and 5 min after endotracheal intubation. RESULTS: The midazolam pretreatment produced transient decreases in systolic BP and the BIS. During IA with propofol, BP decreased 20% in both groups. BIS decreased significantly 5 min after endotracheal intubation. CONCLUSIONS: Midazolam pretreatment attenuated the cardiovascular response to intubation, so BIS is considered a good monitor as a predictor of hypnotic state during intravenous anesthesia.
Anesthesia* ; Anesthesia, Intravenous ; Anesthetics ; Blood Pressure ; Heart Rate ; Hemodynamics* ; Humans ; Intubation ; Intubation, Intratracheal ; Midazolam* ; Oxygen ; Propofol* ; Vecuronium Bromide ; Ventilation

No abstract available.
Arteries ; Arthroplasty, Replacement, Knee ; Hemorrhage ; Humans ; Inflation, Economic ; Tourniquets ; Transplants

BACKGROUND: Endoventricular circular patch plasty (EVCPP)was introduced as an effective reconstructive procedure for ventricular aneurysm and diffuse dilated cardiomyopathy after myocardial infarction.We report the 4-year results of EVCPP in Seoul National University Hospital, the experiences of anesthesia and intensive care for EVCPP in patients with ischemic cardiomyopathy. METHODS: EVCPP has been performed on 31 patients (22 men and 9 women wit h a mean age of 62 years)during 4 years from March 1998 to March 2002.Six patients (19%)were NYHA cl ass II,24 pat i ent s were cl ass III,and 1 pat i ent was cl ass I V.Preoperative and postoperative left ventricular end-diastolic volume (LVEDV),left ventricular end-systolic volume (LVESV),ejection fraction (EF)were determined and compared.Transesoghageal echocardiograghy (TEE)was used to measure the distance between aortic annulus and ventricular aneurysm during EVCPP.Milrinone combined with beta -adrenergics was infused during separation from cardiopulmonary bypass (CPB) and in the intensive care unit. RESULTS: Three patients (10%)needed an intra-aortic balloon pump to wean from CPB and one patient (3%)died in the hospital.Out of 30 survivors,29 patients returned to NYHA class I or II and one patient to class III.Out of 30 patients who underwent echocardiographic study before and after EVCPP,EF increased from 34 +/-9%to 38 +/-10%,and LVEDV and LVESV decreased from 139 +/-43 ml to 94 +/-20 ml and from 90 +/-34 ml to 59 +/-17 ml,respectively. CONCLUSIONS: EVCPP is effective to exclude the akinetic left ventricular segment,thus improving left ventricular function and clinical status of patients with ischemic cardiomyopathy.However, studies concerning postoperative intensive care are warranted to reduce the postoperative complications and morbidity.
Anesthesia ; Aneurysm ; Cardiomyopathies* ; Cardiomyopathy, Dilated ; Cardiopulmonary Bypass ; Echocardiography ; Equidae ; Female ; Humans ; Critical Care ; Intensive Care Units ; Male ; Milrinone ; Postoperative Complications ; Seoul ; Stroke Volume ; Ventricular Function, Left

Chronic thromboembolic pulmonary hypertension (CTEPH) is considered to be an aberrant outcome of acute pulmonary thromboembolism, due to inadequate thrombus dissolution. However, the mechanism of thrombi dissolution failure remains unclear. With respect to inherited thrombophilia, the co-occurrence of natural anticoagulant deficiencies with CTEPH was found to be rare. Pulmonary thromboendarterectomy (PTE) is a potentially curative surgical procedure for CTEPH, but it is associated with considerable mortality due to postoperative complications, such as reperfusion pulmonary edema and right heart failure. The postoperative course after PTE poses a unique series of ventilatory care and hemodynamic management challenges. We present the case of a 42-year-old woman with unilateral CTEPH combined with thrombophilia (Protein S deficiency). Successful PTE was followed by independent lung ventilation with unilateral nitric oxide (NO) inhalation, which resulted in functional improvement without postoperative complications.
Adult ; Endarterectomy* ; Female ; Heart Failure ; Hemodynamics ; Humans ; Hypertension, Pulmonary* ; Inhalation ; Lung ; Mortality ; Nitric Oxide ; Postoperative Complications ; Protein S Deficiency ; Pulmonary Edema ; Pulmonary Embolism ; Reperfusion ; Thrombophilia ; Thrombosis ; Ventilation

Cerebral protection during aortic arch surgery is an anesthetic challenge, since the surgical procedures for aortic arch aneurysm involve an interruption of cerebral blood flow. We report a successfully managed case of aortic arch aneurysm repair with antegrade selective cerebral perfusion (SCP) during TCA (total circulatory arrest) using a transcranial oximeter, cerebral oxygenation was monitored during surgery. Although at the beginning of TCA a decrease in the regional cerebral oxygen saturation was observed, this was soon recovered by SCP. Except for the short period of TCA without SCP, regional cerebral oxygen saturation (rSO2) value were well maintained during surgery.
Aneurysm ; Aorta, Thoracic* ; Oxygen ; Perfusion*