Michael G Richardson

Learn More
BACKGROUND Dextrose-free local anesthetics and opioids, alone and in combinations, are being used increasingly to provide subarachnoid anesthesia and analgesia. These dextrose-free drugs have been described as hypobaric by some and isobaric by others. To accurately classify anesthetics with regard to baricity, the density of cerebrospinal fluid (CSF) must(More)
Preoperatively administered midazolam may contribute to postoperative sedation and delayed recovery from brief outpatient general anesthesia, particularly in patients who receive significant postoperative opioid analgesics. We evaluated the effects of midazolam premedication (0.04 mg/kg) on postoperative sedation and recovery times after laparoscopic tubal(More)
PURPOSE To describe the anesthetic management of a parturient with a large acoustic neuroma undergoing general anesthesia with remifentanil for Cesarean section. CLINICAL FEATURES A near-term parturient presented with a large intracranial mass. Cesarean section under general anesthesia was elected one week prior to craniotomy for tumour resection.(More)
Dextrose-free anesthetic medications are commonly used to provide subarachnoid anesthesia and analgesia. Hypobaricity has been proposed as a mechanism to explain postural effects on the extent of sensory block produced by these drugs. Densities of dextrose-free solutions of local anesthetics and opioids, and commonly used anesthetic/opioid mixtures were(More)
BACKGROUND In 2001, the Institute of Medicine (IOM) recommended six Aims f or Improvement; the dimensions of quality describe a health care system that is safe, timely, effective, efficient, equitable, and patient centered. In 1999, the Accreditation Council of Graduate Medical Education (ACGME) adopted six core competencies that physicians in training must(More)
BACKGROUND AND OBJECTIVES A commonly used test dose in parturients receiving continuous lumbar epidural analgesia for labor consists of 3 mL of dextrose-free 1.5% lidocaine with 1:200,000 epinephrine. METHODS of 1,962 obstetric epidural anesthetics administered over a 17-month period, unintentional subarachnoid placement of the epidural catheter was(More)
PURPOSE We describe an unusual presentation of a case of fulminant unilateral pulmonary edema caused by unrecognized right endobronchial intubation that occurred during patient movement at the end of surgery. We review factors which may predispose to this complication. CLINICAL FEATURES During emergence from anesthesia at the conclusion of bariatric(More)