IMPLICATIONS: Carbon dioxide insufflation into a cardiothoracic wound model was studied with a new device. Efficient air removal (<=0.65% remaining air) required a continuous carbon dioxide flow of >=5 L/min after initial filling during 1 min at 10 L/min. A conventional tube failed to provide efficient de-airing (>=82% remaining air).
IMPLICATIONS: Maintenance of normothermia throughout the nonbypass phases of coronary artery bypass graft surgery is important in the attenuation of myocardial ischemic injury as assessed by intraoperative cardiac-specific troponin I measurements. It may also provide a method of assessing the efficacy of current cardioprotective strategies, as well as of future pharmacological and mechanical approaches.
IMPLICATIONS:Bispectral index (BIS)-guided anesthesia may allow reductions in anesthetic medication and costs without increasing the risk of intraoperative awareness. However, total costs may be increased by monitoring BIS.
IMPLICATIONS: We report a case series of 12 patients with a clinical history of type II heparin-induced thrombocytopenia and describe their hematologic management during cardiac surgery with cardiopulmonary bypass.
IMPLICATIONS: Avoidance of heterogenous blood transfusion in the donor operation for living donor liver transplantation is crucial. We describe our experience with the first 44 liver donors under special consideration of state-of-the-art blood-saving techniques applied.
IMPLICATIONS:The uptake of isoflurane and desflurane during prolonged surgery did not consistently correlate with cardiac output and patient characteristics and differed from two frequently used uptake models. The slowly decreasing rate of uptake implies that the number of vaporizer adjustments during prolonged low-flow anesthesia should be limited.
IMPLICATIONS: Lactated Ringer's solution, albumin, dextran, and hetastarch were compared as replacement fluids in an acute normovolemic hemodilution protocol in adult patients undergoing radical prostatectomy. Differences in coagulation measurements suggest that dextran and hetastarch may attenuate surgically induced hypercoagulability.
IMPLICATIONS: Currently, many units of blood set aside for surgery are never required, resulting in extra work and expense for blood banks. A formula that included patient weight and hematocrit and typical surgery blood loss was used to predict who would require transfusions. We reduced the predicted number of patients who had blood set aside from 178 to 21.
IMPLICATIONS: Articles on volume replacement published between 1981 and 2001 were analyzed. Albumin and gelatin do not predispose to development of kidney dysfunction. Modern hydroxyethyl starch (HES) solutions can be used safely in patients without kidney dysfunction even in large doses. Safety of HES in patients with preexisting altered kidney function still remains unclear.
IMPLICATIONS:Bivalirudin, a new short-acting direct thrombin inhibitor, provides an elimination mechanism independent of specific organ function. We successfully used this new drug, monitored at the point of care via the ecarin clotting time, for anticoagulation during cardiopulmonary bypass in a patient with heparin-induced thrombocytopenia heparin allergy and impaired renal function.
IMPLICATIONS:Use of retractable needle safety IV catheters may increase rather than decrease exposure to blood. The choice of IV system should be left to the clinician's best judgment to balance the efficient establishment of venous access with the least potential for blood contamination.
IMPLICATIONS: IV midazolam mixed in Syrpalta(R) syrup produces a greater sedative effect and higher plasma midazolam levels than the commercially available syrup when used as an oral anesthetic premedication in pediatric surgical patients.
IMPLICATIONS: This study shows that topical application of EMLA(R) cream before circumcision is simple and effective with few side effects.
IMPLICATIONS:The wash-in of sevoflurane and nitrous oxide in healthy children during the mask induction of anesthesia showed a more rapid equilibrium between alveolar and inspired gas concentrations than in adults. Consistent with their respective blood/gas partition coefficients, the alveolar concentration for nitrous oxide increased more rapidly to its inspired concentration than that for sevoflurane. A concentration effect was confirmed with nitrous oxide and a brief, second gas effect, probably explained by the higher solubility of sevoflurane.
IMPLICATIONS: We investigated salicylate effects on the medullary respiratory center. Small-dose salicylate (1 mM) directly stimulated the respiratory center. Large-dose salicylate (10 mM) caused central respiratory depression involving a GABAergic mechanism.
IMPLICATIONS: Conjoined twins have some cross-circulation, which makes general anesthesia for only one patient impossible. Using caudal anesthesia in the awake patient, we were able to provide anesthesia for an inguinal central venous catheter placement in one patient without having to unnecessarily anesthetize the other twin.
IMPLICATIONS: Patient-controlled perineural analgesia techniques using Infusor LV5(R) disposable elastomeric or two types of electronic pumps provide efficient pain relief at home after ambulatory orthopedic procedures. Elastomeric pumps resulted in fewer technical problems and led to better patient satisfaction scores than Microjet(R) electronic pumps.
IMPLICATIONS:We sought to clarify the effect of monitoring oxygen in the blood in surgical patients and to identify the adverse outcomes. A small percentage of oxygen in the blood (hypoxemia) was reduced in a pulse oximetry group; however, the incidence of postoperative complications was the same in a control group. We confirmed that pulse oximetry can detect hypoxemia.
IMPLICATIONS: We developed an orotracheal intubation device equipped with a charge couple device (CCD) camera, providing a wide field of vision. We used this device to perform endotracheal intubations in 62 anesthetized patients undergoing dental treatment and oral surgery. Endotracheal intubation can be easily performed with this device.
IMPLICATIONS: We describe a case where the frequently used bispectral index (BIS) monitor provided the first indication of a massive stroke. The diagnosis of stroke should be considered in the event of an unexplained, sudden, and sustained decrease in the BIS.
IMPLICATIONS: In the present study, we examined, in vivo, whether the duration of immobilization can alter the pharmacodynamics of mivacurium and rocuronium in an immobilized limb and/or a contralateral limb in rabbits. The immobilization disuse atrophy produced by casting led to the development of resistance to both drugs but no resistance was shown in the contralateral limb.
IMPLICATIONS:The neuronal nicotinic acetylcholine (nACh) receptors have received attention as a potential target for general anesthetics because many general anesthetics inhibit their functions. However, effects of gaseous anesthetics, nitrous oxide, and xenon on the ({alpha}7)5 receptor, a subtype of the nACh receptor, have not been examined. We report that these anesthetics inhibit the ({alpha}7)5 nACh receptor at clinical concentrations.
IMPLICATIONS: Propofol bolus administration provides some degree of muscle relaxation in humans. We demonstrated a decrease of motoneuron excitability in the spinal cord, measured by F-wave analysis, a late electromyographic signal. No effects on neuromuscular transmission or muscle contractility, measured by electromyography and mechanomyography, were observed.
IMPLICATIONS: Fentanyl is used as a pain killing drug during surgery, but its effects on small blood vessels are uncertain. We implanted chambers into a skin flap in rats to study skeletal muscle microcirculation. Fentanyl caused a decrease in blood vessel diameter that could potentially reduce blood flow to tissues during surgery.
IMPLICATIONS: Indomethacin is an antiinflammatory medication that seems to have similarly effective pain-relief action, when given epidurally, as one of the most frequently used corticosteroids which has limitations because of common side effects. An added advantage is that indomethacin seems to also "tame" pain transmission.
IMPLICATIONS: We compared pain intensity, analgesic consumption, length of stay, and patient satisfaction in patients undergoing gastric bypass surgery randomized to one of three treatment groups. In responders, infiltration analgesia as part of a multimodal postoperative pain management regimen offered a simple, safe, and inexpensive alternative to epidural pain control.
IMPLICATIONS: This is a clinical prospective and randomized trial. The study shows the efficacy and safety of a single-dose administration of epidural morphine plus small-dose ketamine given as the only treatment for postoperative pain relief in cirrhotic patients having liver resection.
IMPLICATIONS: ß-Endorphin immunoreactive material has been determined in plasma and cerebrospinal fluid under perioperative conditions. Its release into the cardiovascular compartment is related to postoperative pain severity, although its analgesic significance remains to be elucidated.
IMPLICATIONS: This study has shown that detection of the paralytic and/or antinociceptive effect of small-dose lidocaine before planned experiments is a simple and reliable method for prediction of the location of the catheter tip. We suggest that the position of the catheter might cause side differences in the drug effect.
Minute sphere therapy is a form of acupuncture. We tested whether minute spheres placed on three acupressure points relevant to abdominal surgery reduced pain and morphine requirements after abdominal surgery. Treatment and control patients received a similar covering. Neither pain nor morphine requirements were different between the groups.
IMPLICATIONS: We tested the hypothesis that the risk or discomfort associated with a clinical trial influence a patient's decision to participate. Patients who understand the risks involved are twice as likely to consent. In contrast, those who feel pressured do not agree to participate. Many patients are willing to participate in risky or painful studies, apparently for altruistic reasons.
IMPLICATIONS: When a service has filled its allocated operating room (OR) time and has a new case to schedule, OR efficiency is maximized by scheduling the case into the OR time of another service. The service whose OR time is released can be the service with the largest difference between allocated and scheduled OR time at the time when the new case is scheduled.
IMPLICATIONS: In the period 1980-2000, there was an increase in the number of research articles published in the three main anesthesia journals: Anesthesiology, Anesthesia & Analgesia, and Pain. Despite this increase in research activity, there was a significantly disproportionate decrease in the United States versus non-US authorship.
IMPLICATIONS: Macrophage inflammatory protein-1{alpha} (MIP-1{alpha}) has an important role in the development of inflammatory responses. In this study, adrenaline was found to inhibit lipopolysaccharide-induced MIP-1{alpha} production and messenger RNA expression via ß-adrenergic receptors in human monocytes. Our results suggest that adrenaline may modulate MIP-1{alpha} production in inflammatory diseases and sepsis.
IMPLICATIONS: This study shows that dexmedetomidine and S(+)-ketamine influence the expression of apoptosis-regulating proteins in rat brains 4 h after cerebral ischemia/reperfusion. Therefore, it is possible that the neuroprotection seen with dexmedetomidine and S(+)-ketamine might also involve antiapoptotic mechanisms in addition to reducing necrotic cell death.
IMPLICATIONS: {varsigma}1-Receptor ligands decrease infarction size in the striatum when given before or after onset of stroke without affecting ischemia-evoked dopamine efflux.
IMPLICATIONS: We conclude that currently used drugs to treat acute hypertension have no adverse effects on umbilical artery tone; however, larger concentrations (>=10-5 M) of fenoldopam may produce contraction of the umbilical artery.
IMPLICATIONS: The use of central neuraxial anesthesia techniques shortly after an epidural blood patch (EBP) has not been described. The authors discuss the potential concerns and report a unique case of a patient who underwent a cesarean delivery under spinal anesthesia 6 h after an EBP.
IMPLICATIONS: Secondary analysis of data from a large randomized trial of perioperative epidural analgesia demonstrates no beneficial effect on major postsurgical morbidity or mortality from epidural analgesia.
IMPLICATIONS:We investigated the effect of epidural block on perioperative glucose and protein kinetics in patients receiving IV glucose infusion. Endogenous glucose production and plasma glucose concentration were smaller in the presence of epidural block. However, epidural block did not modify perioperative protein metabolism during the administration of IV glucose.
IMPLICATIONS: In uremic patients, enhanced absorption and reduced clearance of ropivacaine and reduced urinary excretion of the ropivacaine metabolites could lead to toxicity. Increased plasma protein binding of ropivacaine in uremic patients reduces elimination of the local anesthetic but may protect against acute toxicity despite large total plasma concentrations of ropivacaine.
IMPLICATIONS: Intrathecal administration of sameridine, a new molecule with both local anesthetic and opioid properties, compared with bupivacaine, a well-known local anesthetic, produces similar and minor effects on respiration over a 24-h observation period.
IMPLICATIONS: The incorporation of dexamethasone into bupivacaine-loaded microcapsules reduces the onset time and prolongs the duration of bupivacaine analgesia over the 0.3125%-5.0% dose range. Bupivacaine microcapsules appear safe for use in intercostal blockade in this preliminary study in volunteers.
IMPLICATIONS: Elderly surgical patients who have had an in-hospital postoperative complication have increased mortality, particularly in the first 3 mo after surgery. Efforts to improve perioperative care delivery to elderly surgical patients must include measures to minimize in-hospital postoperative complications, particularly those involving the pulmonary and renal systems.
IMPLICATIONS: In a group of geriatric patients, the occurrence of postoperative complications did not independently predict long-term quality of life or functional status. The important independent predictors were co-morbid conditions, age, and new hospitalization after discharge.
IMPLICATIONS: Airway management continues to be a challenge despite substantial advances in this field. We found that the upper lip bite test, a reasonably easy test, was more predictive of a difficult airway than the modified Mallampati score.
IMPLICATIONS: In this prospective, randomized study, we found that the ProSealTM laryngeal mask airway was easier to insert and permitted a better delivery of hands-free anesthesia than the Laryngeal Tube(R). The incidence of postoperative laryngopharyngeal discomfort was similar for both devices.
IMPLICATIONS: We demonstrated that the BrandtTM tube system attenuates a decrease in cuff pressure after cessation of nitrous oxide (N2O) administration, whereas a method of repeated cuff deflation to avoid excessive pressure during N2O anesthesia causes deflationary phenomenon of the cuff after cessation of N2O administration, resulting in possible risk of air leaks.
IMPLICATIONS: Intraoperative resuscitation with colloid reduces postoperative nausea and vomiting and improves the quality of postoperative recovery when compared with crystalloid resuscitation.
IMPLICATIONS: The Laryngeal Tube S, fitted with a second lumen serving for suctioning and free gastric drainage, but not for ventilation, as with the Combitube, can be inserted without additional equipment, and was proven in a preliminary clinical trial to effectively ventilate patients with respiratory arrest and to evacuate stomach contents.
IMPLICATIONS: A. W. Hofmann broadly influenced anesthesiology through his seminal work on amine structures and synthetic amine drugs. Many drugs in addition to atracurium should invoke his memory.
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