IMPLICATIONS: Heparin-induced thrombocytopenia is a rare occurrence in pediatric cardiac surgical patients. The incidence of anti-heparin-PF4 antibody seroconversion in children undergoing reoperation is approximately 50% at 10 days postoperatively; age and previous unfractionated heparin exposure correlate with this rate of seroconversion.
IMPLICATIONS: The use of a clinicopathologic approach to the diagnosis of heparin-induced thrombocytopenia (HIT) requires caution when the antigen-based test for HIT antibodies is performed in patients with a low pretest probability of HIT. We describe here a valuable adjunct to the clinical history when recommending heparin use in patients with a positive enzyme-linked immunosorbent assay (ELISA) screening test result: an anti-PF4/heparin ELISA with a confirmatory procedure.
IMPLICATIONS: Blood loss and transfusion requirements can be significantly reduced in major surgery when using third generation hydroxyethyl starch 130/0.4.
IMPLICATIONS: After cardiopulmonary bypass, aprotinin and tranexamic acid were compared as measured by modified thrombelastography and whole blood aggregometry. Postoperative blood loss was reduced by aprotinin and platelet function was preserved as measured by whole blood aggregometry.
IMPLICATIONS: Extremely large doses of rFVIIa may be required in hemophilia patients with inhibitors. We present a case where thrombelastography (TEG(R) and ROTEM(R)) were used to guide dosing and timing of large rFVIIa doses in a hemophiliac requiring surgical evacuation of a spinal hematoma.
IMPLICATIONS: Thromboelastography can be used to guide administering rVIIa in severe refractory thrombocytopenia during the perioperative period.
IMPLICATIONS: Before aprotinin administration, we recommend that the patient's operative history be assessed in detail for exposure to aprotinin within the last 12 mo, which should be viewed as a contraindication. Exposure to aprotinin-containing fibrin sealant within the previous 12 mo should require a careful risk benefit assessment. Preoperative screening for aprotinin-specific IgG (qualitative or quantitative) may be helpful.
IMPLICATIONS: Preoperative factors predicting poor behavioral compliance on anesthetic mask induction may identify children who could benefit from interventions in the preoperative clinic to reduce anxiety. Age, history of previous anesthesia, preoperative tour attendance, preoperative preparation time and anxiety state levels in the preoperative clinic demonstrated a strong relationship to poor behavioral compliance on induction. Race, gender, type of procedure, the American Society of Anesthesiologists class, midazolam premedication, and number of hours fasted demonstrated no relationship to poor behavioral compliance.
IMPLICATIONS: Pediatric mastocytosis is characterized by a spectrum of clinical variants which have in common an increase in mast cells in various organ systems and that can be associated with unprovoked anaphylaxis. Given the complex nature of the disease, understanding the pathophysiology is important for the management of patients with pediatric mastocytosis. This article suggests that commonly administered anesthetics may be used for patients with pediatric mastocytosis.
IMPLICATIONS: Intraoperative IV dexamethasone and ondansetron plus an oral disintegrating ondansetron tablet administered at discharge and on the first two postoperative days significantly reduced incidences of postdischarge nausea and vomiting or reports of negative impact on quality of recovery.
IMPLICATIONS: Palonosetron 0.075 mg reduced the incidence of nausea and vomiting when compared with placebo in inpatients on the day of surgery (0-24 h) and 0-72 h postoperatively.
IMPLICATIONS: Palonosetron 0.075 mg provided a statistically superior complete response rate for postoperative nausea and vomiting compared to placebo for at least 24 hrs.
IMPLICATIONS: The incidence of postoperative nausea and vomiting remains high in patients with known risk factors who are undergoing laparoscopic or major plastic surgery procedures despite multimodal antiemetic prophylaxis.
IMPLICATIONS: Despite the frequent use of two or more antiemetic drugs for prophylaxis, the incidence of postoperative nausea and vomiting in the first 24 h after elective laparoscopic and plastic surgery procedures increased in proportion to the Apfel risk score. However, this risk scoring system was less predictive in the later recovery period (24-72 h after surgery).
IMPLICATIONS: Palonosetron exhibits unique molecular interactions with the 5-HT3 receptor. Palonosetron's combined properties of allosteric binding, positive cooperativity, and long-term effect on receptor function make it a distinctive antagonist within the 5-HT3 receptor class.
IMPLICATIONS: The divergent potencies of many inhaled anesthetics on ion channels suggest the possibility that combinations of such anesthetics might be superadditive (synergistic). However, we found that combinations of inhaled anesthetics do not produce synergistic interactions as regards MAC. Fifteen of 16 combinations produced additivity and one produced infraadditivity (antagonism), a result consistent with a common site of anesthetic action.
IMPLICATIONS: This study sought to detect synergistic modulation of ligand gated ion-channel function by pairs of general anesthetic drugs. Six drug combinations were used on three ion channels. All anesthetic interactions were found to be additive.
IMPLICATIONS: IV anesthetics acting at different sites usually demonstrate synergy in humans and animals for the end-points of hypnosis and immobility, with the notable exception of ketamine. Inhaled anesthetics usually demonstrate synergy with IV anesthetics. However, no pair of inhaled anesthetics demonstrates synergy when administered together.
IMPLICATIONS: Drugs interact in an additive manner when two drugs compete for the same site of action, or when the concentrations responsible for the drug effect of interest are well below kd, the dissociation constant. If the concentration associated with clinical drug effect is at or above kd, then the interactions are necessarily synergistic.
IMPLICATIONS: Synergistic interactions among pairs of nondepolarizing muscle relaxants were first described over 25 years ago, but a molecular explanation for this has been elusive. Here, we provide evidence that synergy can exist at the level of the adult human muscle nicotinic acetylcholine receptor. This is probably not the complete explanation, but it represents a large step forward.
IMPLICATIONS: Our study present evidence that propofol protects hepatocytes against hydrogen peroxide-induced apoptosis. Interestingly, not consistent with previous reports, we found that extracellular signal-regulated kinases (ERK) are the target of propofol and that ERK activation contributes to the protective role of propofol. In addition, mRNA expression of Bad and Bax was repressed by propofol in an ERK-dependent manner. These results will add to research on the molecular mechanism underlying the protective role of propofol.
IMPLICATIONS: Infrared pulse waves from stereotactical image guidance systems for neuronavigation may cause erroneous readings in certain types of pulse oximeters. This effect may be abolished by sufficiently shielding the probe. Placement of an aluminum sheet over the probe effectively eliminated interference.
IMPLICATIONS: The click sounds increased Bispectral Index, state entropy, and response entropy transiently during different levels of propofol sedation during spinal anesthesia.
IMPLICATIONS: Ropivacaine can be delivered during CO2 insufflation using a microvibrating nebulizer designed to humidify the insufflated gas, whereas evaporative humidifiers are less effective.
IMPLICATIONS: The LMA CTrachTM is a new airway management device with a fiberoptic viewer that has proven useful for ventilation and intubation of patients with difficult airways. Local pathology, such as lingual tonsillar hyperplasia, may interfere with visualization of the larynx and passage of the endotracheal tube.
IMPLICATIONS: Intubation bougies are useful adjuncts for tracheal intubation when laryngoscopic view of the airway is difficult. The use of bougies, however, can lead to significant tracheal injury and morbidity.
IMPLICATIONS: Intrathoracic blood volume index and central venous pressure, when compared in critically ill patients with acute circulatory failure, have a similar ability to predict fluid responsiveness.
IMPLICATIONS: The combination of recruitment maneuver (RM) and noninvasive ventilation (NIV) and NIV alone resulted in improved postoperative oxygenation, pulmonary function tests, and atelectasis scores compared to the control group. Prophylactic use of NIV, either alone or in combination with RM after open heart surgery, has no effect on the duration of mechanical ventilation, intensive care unit stay, or hospitalization period.
IMPLICATIONS: Because anaphylaxis is uncommon, unpredictable and may be fatal, a prospective, randomized, controlled trial in humans on the best management is difficult and guidelines are based on theory and anecdotes only. We add six more anecdotes in which the use of vasopressin was successful in the treatment of anaphylactic shock.
IMPLICATIONS: Unilateral nerve stimulator-guided pudendal nerve block with ropivacaine is effective in pain relief after mediolateral episiotomy and reduces the need for additional analgesics.
IMPLICATIONS: Random drug testing of anesthesia residents may reduce the incidence of substance abuse. This article summarizes the initial development and results of a testing program.
IMPLICATIONS: About 25% of patients having carotid endarterectomy develop significant cognitive dysfunction with a regional anesthetic 1 day after surgery. This result is similar to previously reported findings when carotid endarterectomy is performed with a general anesthetic and strongly suggests that cognitive dysfunction arises from surgery and not anesthesia.
IMPLICATIONS: Prophylactic IV dexmedetomidine decreased lung permeability and attenuated hemodynamic changes induced by intracranial hypertension in rats.
IMPLICATIONS: We present the first description of anesthetic management of a patient with 3-methylcrotonyl-CoA carboxylase deficiency. Patients with this inherited metabolic defect often have underlying cardiac myopathy and may be profoundly carnitine deficient, placing them at risk for severe metabolic decompensation, acidosis, and hypoglycemia in the perioperative setting.
IMPLICATIONS: Administration of parecoxib sodium 20 mg once or twice daily provides effective and well-tolerated analgesia over 5 days after total hip arthroplasty.
IMPLICATIONS: Acupressure at the extra 1 point significantly reduced needle insertion pain and autonomic nervous system response.
IMPLICATIONS: We tested two regimens of patient-controlled paravertebral analgesia for postoperative breast cancer surgery patients. Both regimens provided satisfactory analgesia and were well tolerated.
IMPLICATIONS: Intraarticular midazolam provides pain relief of short duration after arthroscopic knee surgery.
IMPLICATIONS: Loss of inward Ca2+ current in A-type neurons, such as follows peripheral nerve injury, contributes to increased sensory neuron excitability. Measures that increase inward Ca2+ flux may potentially be therapeutic for painful peripheral neuropathy.
IMPLICATIONS: Using a mouse model of excisional wound injury, we demonstrated that high-dose morphine impairs angiogenesis and reduces mobilization of endothelial progenitor cells, leading to delayed wound healing.
IMPLICATIONS: This study demonstrated that intrathecal clonidine injection dose-dependently reduces mechanical allodynia and thermal hyperalgesia in neuropathic rats and that this reduction is associated with a significant suppression of the phosphorylation of the N-methyl-D-aspartate (NMDA) receptor NR1 subunit in the dorsal horn. These data suggest that modulation of spinal NMDA receptor activation may be one of mechanisms underlying the antihyperalgesic or antiallodynic effect of intrathecal clonidine treatment in neuropathic patients.
IMPLICATIONS: During continuous popliteal-sciatic perineural infusion, local anesthetic concentration and volume influenced block characteristics. Patients given a 0.2% ropivacaine infusion at 8 mL/h experienced an insensate limb three times more often than those given 0.4% ropivacaine at 4 mL/h. In contrast, analgesia and satisfaction were similar in each group.
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