Implications: Abnormal diastolic filling patterns are frequently observed during cardiac surgery. The data support routine evaluation of diastolic function during echocardiographic cardiac assessment of patients undergoing cardiac surgery.
Implications: Small amounts of ethanol improve the functional recovery of postischemic, reperfused myocardium in barbiturate-anesthetized dogs. These beneficial effects are not related to adenosine triphosphate-dependent potassium channels.
Implications: In normothermic patients without pulmonary disease, acute changes in PETCO2 during separation from cardiopulmonary bypass were reflective of changes in pulmonary artery blood flow. Specific PETCO2 values were predictive of cardiac output values under the clinical conditions of the study.
Implications: PentaLyte(R) administration does not decrease the heparinoid release associated with aortic occlusion-reperfusion but does decrease the elaboration of a thrombotic mediator. This study serves as a rational basis to determine whether coadministration of PentaLyte(R) with a heparin antagonist (e.g., protamine or heparinase) may maintain hemostasis after aortic occlusion-reperfusion.
Implications: In rabbit whole blood, nitric oxide (NO) decreases hemostatic function by decreasing both coagulation protein function and platelet function. Coagulation protein function may be similarly affected in clinical situations involving the administration of NO or NO donors.
Implications: Hemoglobin solutions are used as alternatives to blood transfusion. In animals, they cause vasoconstriction by binding nitric oxide. This is an in vitro study of the effects of one hemoglobin solution in human blood vessels. It shows that this hemoglobin solution alone had no effect in human tissue but antagonized other agents used to alter vessel tone.
Implications: In a porcine model of profound hypothermia (<5{degrees}C) and circulatory arrest, complete blood replacement resulted in superior neurological outcome. This finding suggests that at ultralow temperatures, the presence of erythrocytes or some other blood component may be deleterious.
Implications: Surgery on the aorta is a great challenge for the anesthesiologist, even with newly developed and less invasive stent-graft procedures. The case of a fatal cerebral embolism during endovascular repair of an abdominal aortic aneurysm is reported, and the potential mechanisms underlying this unexpected complication are discussed.
Implications: We describe the use of echocardiographic imaging to assist in the placement of an aortic cannula that provides differential perfusion of the arch and descending aorta during cardiac surgery in adults.
Implications: Bowl-based autotransfusion devices reduce the amount of fat found in shed blood, but cannot completely eliminate fat particles. When fat is seen on the surface of the processed blood, this blood should be filtered with a leukocyte removal filter before retransfusion.
Implications: Despite pain medication, up to 40% of patients experienced pain at home after ambulatory hand surgery. Of the three analgesic drugs evaluated in this double-blinded study, tramadol was the most effective but was also associated with most patient dissatisfaction because of an increased incidence of nausea and dizziness. Metamizol provided somewhat better analgesia than acetaminophen. There is a need for better oral pain medication at home.
Implications: Adjunctive use of a variable-rate infusion of esmolol during outpatient anesthesia with desflurane-nitrous oxide was associated with less postoperative nausea and vomiting than a remifentanil infusion. However, both adjuvants facilitated fast-tracking and lead to early discharge after laparoscopic tubal ligation surgery.
Implications: Vocal cord palsies are caused by high intracranial pressure and normally improve with treatment. Our case report implies that stridor after drainage of a hydrocephalus, in susceptible patients, can be a result of worsening of vocal cord palsies.
Implications: Xenon may suppress adverse neuronal effects of ketamine. Conversely, combined use of N2O and ketamine may increase the risk of neuronal adverse effects, such as psychotomimetic effects.
Implications: This study investigated remifentanil as a single infused drug to determine its analgetic property. A dose-dependent effect was found in a human heat pain threshold assessment.
Implications: The esophageal detector device (EDD) failed to confirm endotracheal tube (ETT) placement in more than 25% of tracheal intubations in this study. One must not rely too heavily on the results of the EDD alone, and proper clinical judgment in conjunction with all available modalities should be used to confirm ETT placement in out-of-hospital cardiac arrest patients.
Implications: There is substantial variability in dose of benzocaine administered by nonmetered Hurricaine(R) spray. Canister orientation and residual volume of anesthetic significantly affect output of benzocaine and are clinically uncontrollable. Methemoglobinemia may occur even after the manufacturer's suggested spraying guidelines. We saw no correlation between dose and spraying time or number of sprays.
Implications: Circuit simulations were used to evaluate radiofrequency transmission from the electrosurgical unit (ESU) to monitoring devices in the operating room. A connection between the dispersive electrode and a medical device can occur outside the body, as simulated by current passing through an electrolyte fluid medium; or through higher resistance pathways such as body tissue, as simulated by current passing through water. The variability in voltage and spark intensity among the monitoring devices that we investigated suggests different relative risks for an ESU-induced thermal injury.
Implications: We have established a cost-benefit analysis for an antiemetic therapy. Patients highly value avoiding postoperative nausea and vomiting. The amount they are willing to pay for a totally effective antiemetic is US$61-$US113..
Implications: Transient neurologic symptom (TNS) can follow spinal anesthesia and manifests as back pain radiating to the legs, resolving spontaneously. Spinal anesthesia for cesarean delivery was performed with either hyperbaric lidocaine 5% (n = 100) or hyperbaric bupivacaine 0.75% (n = 100). TNS was not noted in any patient.
Implications: The occurrence of transient neurologic symptoms with intrathecal lidocaine among obstetric patients in the supine surgical position appears to be infrequent and without serious sequelae. However, larger randomized studies conducted under similar controlled conditions are warranted to conclusively ascertain the incidence of transient neurologic symptoms with lidocaine in a similar population.
Implications: Determination of minimum local analgesic concentrations by the technique of sequential allocation allows the interaction between epidural opioids and local anesthetics to be quantified. This study demonstrates that the addition of fentanyl significantly reduces levobupivacaine requirements for epidural analgesia.
Implications: Our study implies that the application of continuous positive airway pressure (CPAP) does not affect transcranial Doppler monitoring of the middle cerebral artery blood flow velocity and that the effect of CPAP on cerebral hemodynamics is less than had been previously suggested.
Implications: Ischemic tolerance in the spinal cord is induced in 4 days, not yet induced in 2 days but gone by 7 days, after ischemic pretreatment. The amount of heat shock protein 70 (HSP70) in the cytoplasm does not explain this temporal profile, but HSP70 in the nucleus might play a role in the acquisition of ischemic tolerance.
Implications: Supraorbital and greater occipital nerve blocks represent an effective alternative to subcutaneous infiltration for placement of a stereotactic head-frame. With the techniques used in our study, nerve blocks were less painful than subcutaneous infiltration.
Implications: High-pressure ventilation demonstrated, in the early phase, not only proinflammatory processes, including neutrophil infiltration and adhesion molecules upregulation on macrophages, but profibriogenetic processes, including transforming growth factor-{beta}1 mRNA expression in the lung tissue. These immunological alterations may be involved in the progress of ventilator-induced lung injury.
Implications: In septic patients, mechanical ventilation of the lungs is sometimes needed, and propofol and midazolam are widely used for sedation. Midazolam was less inhibitory for neutrophil function than propofol during sepsis; thus, midazolam may be preferable to propofol for sedation during sepsis for preserving the neutrophil function to combat sepsis.
Implications: We investigated the reliability of direct examination versus quantitative cultures in the early diagnosis of ventilator-associated pneumonia using the protected bronchoalveolar lavage in 104 patients. Regarding detection of bacteria using the Gram stain, we found low sensitivity and negative predictive value and high specificity and positive predictive value.
Implications: Although dextromethorphan is an N-methyl-d-aspartate antagonist in animals, this property may not be realizable in human postoperative pain states.
Implications: This study demonstrated that, after total hip arthroplasty, an extended femoral nerve sheath block consisting of patient-controlled analgesia boluses (5 mL per 30 min) of 0.125% bupivacaine with clonidine 1 {micro}g/mL and sufentanil 0.1 {micro}g/mL provides efficient postoperative analgesia and significantly minimizes local anesthetic consumption.
Implications: Interior rotation of the leg facilitates needle insertion in the anterior approach to sciatic nerve block.
Implications: Epidural block causes a transient and significant alteration of lymphocyte subsets and natural-killer cell activity regardless of pain status. Our results indicate that local sympathetic nerve block may be important in modulating an immune response.
Implications: The site of infusion and the surgical procedure, with the exception of liver surgery, do not affect plasma lidocaine concentrations under continuous epidural infusion at a rate of 1.5 mg{middle dot}kg-1 {middle dot}h-1. Caution should be used when patients receive epidural infusion of lidocaine during hepatectomy.
Implications: Chronic continuous infusion of the glucocorticoid, methylprednisolone, relieved pain in a rodent model of nerve injury, and this effect persisted after discontinuing the drug. Methylprednisolone may be a curative treatment for some types of neuropathic pain when administered in divided daily doses over several weeks.
Implications: With electroanalgesic techniques such as percutaneous neuromodulation therapy, the pattern of the electrical stimulation can influence the acute analgesic response even when identical stimuli are administered at the same dermatomal levels.
Implications: This study included patients with neuropathic pain suppressed by spinal cord stimulation (SCS). After deactivation of SCS, different drug effects were evaluated. In contrast to morphine, carbamazepine showed significant pain relief compared with placebo.
Implications: Accidental intravascular injection of bupivacaine can induce toxic effects on the heart. We investigated the sensitivity of different bupivacaine structures' actions on the Ca2+ conducting channels in rat ventricular cells and concluded that the increased toxicity of R(+) bupivacaine is not explained by actions on the Ca2+ channels' inhibition.
Implications: Microscopic needles previously shown capable of transdermal delivery of drugs and proteins are demonstrated to be painless when pressed into the skin of human subjects.
Implications: Interest in nonpharmacologic alternatives to conventional analgesic drugs for the management of acute and chronic pain has lead to an evaluation of the use of electroanalgesic therapies.
Implications: General anesthesia is best avoided in cases of Klippel-Feil syndrome where tracheal intubation is potentially difficult. The syndrome features severe abnormalities of the neck and upper thoracic spine, which may also lead to difficulties with neuraxial blockade. We describe the use of epidural anesthesia for bilateral reduction mammoplasty in a patient with this condition.
Implications: The aim of this investigation was to validate a simple tracheal intubation algorithm used in daily practice for years as a quality control exercise. With the exception of the guidewire, the only airway management instrument used was the fiberoptic bronchoscope. Of 13,248 intubations evaluated (90.6% of all intubations), only six patients (0.045%) could not be intubated by following our algorithm. The high proportion of primary fiberoptic intubations (12.1% of all intubations) has resulted in a corresponding degree of practice and experience with this method, with the consequence that the number of unanticipated failed intubations is very small. Daily practice is the key to success in the emergency situation.
Implications: The three vital capacity inhaled anesthetic techniques with 8% sevoflurane and 66% N2O in O2 to receive 6% end-tidal sevoflurane may be an alternative for endotracheal intubation in adults who are at high risk from succinylcholine.
Implications: A novel molecule, sameridine, produces both a local anesthetic blockade and a partial {micro}-agonist action. In large doses, the ventilatory CO2 response was depressed, which was not the case when the recommended clinical dose was used.
Implications: Shaker channels are important elements during halothane inhibition of a specific reflex in Drosophila. Neurons that express these channels, which are irregularly distributed in the brain of flies, provide promising leads to identifying anesthetic-sensitive components.
Implications: We found that smoking status, preoperative smoking, body weight and gas flow rates were major factors of affecting peak and mean carbon monoxide concentrations in low-flow anesthesia. Our direct measurement system is useful for monitoring real time exposures to CO during continuous clinical anesthesia.
Implications: Auricular acupuncture at the "relaxation" point can decrease anxiety in healthy volunteers.
Implications: We report on a patient with Coffin-Siris syndrome and consider a potential association between this condition and difficult intubation. Although this inherited condition is extremely rare, anesthesiologists should be aware of its existence and prepare for potential airway management problems whenever it is encountered.
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