IMPLICATIONS: The objective of this study was to evaluate prognostic models for quality assurance purposes to predict the occurrence of automatically detected intraoperative cardiovascular events in 58,458 patients undergoing noncardiac surgery. Two newly developed models showed good discrimination but, because of reduced calibration, their clinical use is limited. The ASA physical status classification and the Revised Cardiac Risk Index are unsuitable for the prediction of intraoperative cardiovascular events.
IMPLICATIONS: Continuation of aspirin until the day before coronary artery bypass grafting may increase postoperative bleeding. The administration of desmopressin to these patients after the neutralization of heparin with protamine sulfate does not reduce postoperative bleeding.
IMPLICATIONS: The presence of patent foramen ovale is associated with new-onset postoperative atrial fibrillation after coronary artery bypass graft surgery. This finding requires further validation in future prospective trials.
IMPLICATIONS: IV almitrine improves oxygenation during one-lung ventilation without hemodynamic modification. Such treatment could be used when conventional ventilatory strategy fails to treat hypoxemia or cannot be used.
IMPLICATIONS: Propofol induced a coronary vasodilation that was amplified in the presence of hyperoxia. This phenomenon does not seem to be related to previous coronary vasoconstriction. The myocardial effects of propofol were not significantly modified in the presence of hyperoxia.
IMPLICATIONS: In a rabbit thrombosis and hemorrhagic model, a polymerized bovine-derived hemoglobin solution and a gelatin solution infusion decreased arterial thrombosis and lengthened bleeding time.
We report the diagnosis of a liver laceration in a trauma patient by novel use of the transesophageal echocardiographic imaging modality.
IMPLICATIONS: We report an unusual case of pulmonary artery catheter (PAC) damage during transmyocardial laser revascularization (TMLR). This observation should alert the anesthesiologist to the fact that the PAC may be damaged when TMLR is performed on the right side of the heart. We recommend that the PAC be withdrawn during this procedure.
IMPLICATIONS: We compared new pulse oximeters from Nellcor and Masimo and found that, with good signal conditions, both new devices performed similarly to older technology. Overall, Masimo reported less data as questionable than Nellcor. With poor signal conditions or during hypoxemia, the new devices are not clinically equivalent to each other or to the older technology.
IMPLICATIONS: Continuous psoas compartment blocks provide optimal pain relief in children after major orthopedic surgery without major adverse events. The landmarks used, defined in a preliminary computed tomographic scan study, were more medial than conventional landmarks.
IMPLICATIONS: An epidural blood patch successfully treated a large cerebrospinal fluid leak of long duration in a 3-yr-old. Considering the distress of such a leak to the patient, staff, and parents, epidural blood patch may be considered as an early treatment option.
IMPLICATIONS: A systematic analysis of the literature comparing postoperative recovery after propofol, isoflurane, desflurane, and sevoflurane-based anesthesia in adults demonstrated that early recovery was faster in the desflurane and sevoflurane groups. The incidence of nausea and vomiting were less frequent with propofol.
IMPLICATIONS: This study shows that early ambulation time does not increase the incidence of transient neurologic symptoms after spinal anesthesia with 50 mg of 2% lidocaine for elective knee arthroscopy.
IMPLICATIONS: The intracerebroventricular administration of the gap-junction inhibitor, carbenoxolone, reduced the MAC of sevoflurane, and sevoflurane suppressed the signaling through gap-junctions in the central nervous system. The inhibition of gap-junctions may be one of the mechanisms and the site of action of sevoflurane.
IMPLICATIONS: At clinically achievable concentrations, methadone inhibits functional N-methyl-D-aspartate receptors. These results indicate a unique mode of action by this opioid that may enhance its ability to treat chronic pain and to limit opioid tolerance.
IMPLICATIONS: Although the {alpha} subunit of heterotrimeric G proteins is a potential target of anesthetics, we found no evidence that hexanol affects the ability of the G{alpha}i subunit to bind or hydrolyze guanosine triphosphate, either in purified subunits or in subunits derived from smooth muscle cell membranes. This finding implies that this is not a mechanism by which hexanol interferes with receptor-G protein function.
IMPLICATIONS: Tissue factor (TF) initiates physiological coagulation in vivo. Hepatoenteric ischemia-reperfusion injury is associated with peroxynitrite (OONO-) formation, coagulopathy and decreased TF activity in rabbits. We determined that OONO- decreased rabbit TF activity in vitro via thrombelastography(R).
IMPLICATIONS: N-methyl doxepin and doxepin are both potent Na+ channel blockers; they elicit rat sciatic nerve block lasting longer than that induced by bupivacaine and seem to be nontoxic to peripheral nerves at concentrations up to 10 mM.
IMPLICATIONS: Bupivacaine, a long-acting local anesthetic, induces central nervous system toxicity when its plasma concentration is increased. Nicardipine and phentolamine increased the cumulative dose but did not affect the threshold plasma concentrations, required for bupivacaine-induced convulsions, suggesting that both nicardipine and phentolamine inhibited the increase in the plasma concentration of bupivacaine by inducing peripheral vasodilation.
IMPLICATIONS: Pain associated with IV injection of propofol is seen in 28%-90% patients. Pretreatment with thiopental 0.25 mg/kg and 0.5 mg/kg after manual venous occlusion for 1 min effectively attenuated pain associated with propofol injection. Thiopental 0.5 mg/kg was the most effective in prevention of propofol pain and can be used routinely.
IMPLICATIONS: The pharmacodynamic profile of a lower-lipid containing emulsion of propofol (Ampofol(R)) was compared with Diprivan(R) when administered for induction and maintenance of general anesthesia. This preliminary study demonstrated that the two formulations of propofol were equivalent with respect to their induction and maintenance properties. However, Ampofol(R) was associated with a more frequent incidence of pain on injection.
IMPLICATIONS: This study in 18 adult patients undergoing radical prostatectomy describes the relationship between Narcotrend index and bispectral index versus predicted propofol effect compartment concentrations. In terms of prediction probability, the performance of the Narcotrend index and the bispectral index to predict propofol effect site concentrations was comparable.
IMPLICATIONS: Complex movement can occur when a noxious stimulus is applied to an anesthetized animal. The frequency components of these movement patterns can be described and quantified by spectral analysis, thus providing a useful tool to investigate the immobilizing properties of anesthetics.
IMPLICATIONS: The transfer of frames and loops from echocardiographic machines to personal computers is often useful for publication, teaching, and educational purposes. We present an easy and cost-effective method for transferring frames and loops from any echocardiography machine into a personal computer using a digital video camera.
IMPLICATIONS: The bispectral index (BIS) can be prone to artifact. In this report we found that electrocardiogram artifact led to an apparent normal BIS in a patient with complete burst-suppression associated with severe brain injury.
IMPLICATIONS: Patient-controlled epidural analgesia is increasingly used as first-line treatment for postoperative pain management. In this study, costs and cost drivers are analyzed for the first time for this new technique, based on 350 cases of pain therapy after major surgery in a university hospital.
IMPLICATIONS: Patients undergoing bone-malignancy surgery under combined general and epidural anesthesia received randomly patient-controlled epidural analgesia (PCEA) or IV patient-controlled analgesia (PCA) postoperatively and dextromethorphan (DM) 90 mg or placebo double-blindly for 3 days (n = 30/group/set). The DM effect was recorded with minimal untoward effects: it afforded better pain control and reduced the demand for analgesics compared with the placebo, especially when associated with PCEA. DM patients ambulated earlier than placebo recipients.
IMPLICATIONS: The immune system not only contributes to inflammation, but also provides localized analgesia. A depleted immune system results in a reduction of immune-derived analgesia and a potentiation of inflammatory pain. Donor activated lymphocytes reverse these effects, highlighting the importance of a functional immune system in inflammatory pain.
IMPLICATIONS: Transcranial electrostimulation produces a significant, frequency-dependent antinociceptive effect that may be mediated by cutaneous nerves of the scalp.
IMPLICATIONS: In this randomized, double-blinded study, clonidine 150 {micro}g both intrathecally and orally prevented postoperative alcohol-withdrawal symptoms in alcohol-dependent men. The effect was superior to that with a single dose of diazepam 10 mg orally.
IMPLICATIONS: Spinal cord stimulation when used for control of chronic pain in diabetics may provide additional benefits of improving glycemic control and insulin requirements.
IMPLICATIONS: A child with neurofibromatosis, scoliosis, and a chest wall deformity presenting for spinal fusion developed severe hypotension while prone. This was due to compression of the heart by the sternum, not compression of the great vessels by neurofibromas. Sternal pressure in prone patients with chest wall deformities should be avoided. Unique management included the use of transesophageal echocardiography to determine the cause of the hypotension.
IMPLICATIONS: Recent outcome studies suggest improved patient outcomes when physicians medically direct nurse anesthetists versus anesthesia care delivered with nonmedically directed nurses. The relative cost-effectiveness of this practice model is, however, unknown. This economic analysis suggests that outcome gains with physician anesthesia may be obtained at cost savings or, under conservative assumptions, at a cost deemed reasonable by society.
IMPLICATIONS: Provided operating room (OR) time is allocated and cases are scheduled based on maximizing OR efficiency, then whether OR time is released five days or one day before the day of surgery has a negligible effect on OR efficiency.
IMPLICATIONS: Bluetooth, a new radio technology transmitting at 2.4 GHz, was tested in a clinical setting. The study showed that a single Bluetooth link was robust and electromagnetically compatible with the tested electronic medical devices.
IMPLICATIONS: A randomized, controlled laboratory experiment indicated that hydroxyethyl starch (HES) could reduce increased lung capillary permeability in endotoxemia. This effect may be due to an antiinflammatory effect of HES.
IMPLICATIONS: In 62 patients undergoing elective major thoracic or abdominal surgery, mechanical ventilation with low tidal volumes and positive end-expiratory pressure or high tidal volumes and zero end-expiratory pressure did not result in different pulmonary or systemic levels of measured inflammatory markers.
IMPLICATIONS: Lung injury was quantified on computed tomography and related to monitored values of functional residual capacity and mechanical properties of the respiratory system. We found the functional residual capacity to be a more sensitive marker of the lung perturbations than the compliance. It might be of value to include functional residual capacity in the monitoring of acute lung injury.
IMPLICATIONS: In this animal study pretreatment with bupivacaine attenuated the progression of myocardial acidosis during ventricular fibrillation. The dogs regained normal hemodynamic variables after lipid infusion. The findings suggest such that bupivacaine may protect the heart against ischemic acidosis.
IMPLICATIONS: We present a case of massive rupture of hepatic Echinococcus cyst associated with mechanical ventilation. We believe that the use of a double-lumen endotracheal tube could be crucial in the management of the hydatid cysts of the liver with thoracic involvement.
IMPLICATIONS: The effect of isoflurane on neuronal apoptosis was investigated in rats subjected to focal cerebral ischemia. In isoflurane-anesthetized animals, ischemia-induced apoptosis occurred during the later stages of postischemic recovery. Isoflurane did not inhibit postischemic neuronal apoptosis.
IMPLICATIONS: We present a case of stroke diagnosed in the recovery room after lung cancer resection. The cause of the stroke was tumor that embolized from the lung to the middle cerebral artery. Tumor embolism should be considered in the differential diagnosis of immediate postoperative stroke after lung cancer surgery.
IMPLICATIONS: When compared with conventional, single-shot spinal anesthesia, epidural volume extension of a small-dose spinal block provides satisfactory anesthesia for cesarean delivery with only 55% of the bupivacaine dose required and is associated with faster motor recovery of the lower limbs.
IMPLICATIONS: In patients receiving spinal anesthesia for elective cesarean delivery, a prophylactic infusion of phenylephrine 100 {micro}g/min decreased the incidence, frequency, and magnitude of hypotension with equivalent neonatal outcome compared with a control group receiving IV bolus phenylephrine.
IMPLICATIONS: Acute heart failure is a life-threatening event that only rarely occurs during childbirth. We report a case of a woman who experienced cardiovascular collapse during vaginal delivery. We determined that she met current diagnostic criteria for peripartum cardiomyopathy, and we successfully treated her with levosimendan, a calcium-sensitizing drug with additional vasodilation properties.
IMPLICATIONS: Because of the potential interaction between regional anesthesia and Guillain-Barre syndrome in pregnant women, the risks of worsening neurologic status and alternative analgesia options should be discussed with the parturient.
IMPLICATIONS: Combined spinal-epidural block can be complicated by persistent fluid leak from the skin insertion site. Testing for the presence of cerebrospinal fluid may be a useful aid to management.
IMPLICATIONS: The parasacral sciatic block results in a frequent success rate of blockade of all three major components of the sciatic plexus (tibial, common peroneal, and cutaneous nerve of thigh). A contrast radiography can be used to confirm the proper position of the catheter.
IMPLICATIONS: This study was designed to evaluate the effect of dexmedetomidine when added to lidocaine for IV regional anesthesia. This is the first clinical study demonstrating that the addition of 0.5 {micro}g/kg dexmedetomidine to lidocaine for IV regional anesthesia improves quality of anesthesia and intraoperative-postoperative analgesia without causing side effects.
IMPLICATIONS: Tetracaine induced intracellular Ca2+ increases and growth cone collapse in dorsal root ganglion neurons. The Ca2+ hot spot in the growth cone expanded into the neurite from periphery towards the cell body.
IMPLICATIONS: Substance P levels in urine initially increased and then declined in a series of 5 patients who achieved pain control by epidural local anesthetic infusion during a flare-up of interstitial cystitis.
IMPLICATIONS: We describe a case of a large retroperitoneal hematoma after the placement of an uneventful spinal block. The patient required four units of packed red blood cells despite having normal coagulation profiles throughout the event. The diagnosis and treatment of retroperitoneal hematoma are discussed.
IMPLICATIONS: Clinicians should be aware that acceleromyography as used in this study does not always provide precise train-of-four ratio measurements. Two isolated acceleromyograph train-of-four ratios are not an accurate representation of the neuromuscular status of the patient recovering from anesthesia.
IMPLICATIONS: Blind intubation via the intubating laryngeal mask airway (ILMA) offers frequent success and a clinically acceptable intubation time even in patients in the lateral position.
IMPLICATIONS: This case report highlights problems during right internal jugular vein cannulation resulting from high back pressure and flow from superior vena cava obstruction in steroid-induced mediastinal lipomatosis. Other anesthetic considerations in mediastinal lipomatosis are also discussed.
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