摘要:

The ability of magnesium to control cardiovascular disturbances and inhibit the release of catecholamines at the time of tracheal intubation was investigated in otherwise healthy men aged between 19–51 years who

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Undiagnosed esophageal intubation remains a major cause of anesthetic morbidity and mortality. The authors describe a technique for diagnosing such placement which does not require the use of complex monitoring equipment. The method is based on the passage of a lubricated nasogastric tube via an endotracheal tube and applying 450 mmHg of suction while attempting its gentle withdrawal. The length of tube insertable would be much shorter in the trachea since it would meet segmentai bronchial resistance; the application of suction would produce collapse of the esophagus, but not the cartilage-supported trachea, and prevent both aspiration and withdrawal, and the presence of bile or gastric content would be diagnostic.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

In order to assess the incidence of awareness during general anesthesia for cesarean section employing varied anesthetic regimens, 50 healthy full-term parturients undergoing elective cesarean section were randomly divided into 5 groups. Group I were induced into anesthesia with 4 mg/kg of thiopental and maintained with 50% N2O-0.5% halothane, Group II were induced with 4 mg/kg of thiopental and maintained with 50% N2O-1.0% halothane, Group III were induced with 1.5 mg/kg of ketamine and maintained with 50% N2O-0.5% halothane, Group IV were induced with 1.5 mg/kg of ketamine and maintained with1% halothane, and Group V induced with 1.5 mg/kg of ketamine and no other agent for maintenance save oxygen. All patients were intubated with the aid of 1.5 mg/kg of succinylcholine, and after delivery all were given 2:1 N2O-O2-fentanyl-alcuronium.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

A review of records of 2270 consecutive deliveries at the authors' hospital indicated that women in labor were significantly more likely to become pyrexial if they had epidural analgesia than if they did not. In order to evaluate this impression, the authors studied 40 consecutive women in spontaneous labor at term who had no fever and no evidence of infection, and who received analgesia for labor with either epidural analgesia (L1-L4segmental blocks) or IM meperidine (one or more 100 mg injections). At the time of entry into the study, urine and high vaginal cultures were obtained and temperatures were determined: orally with a standard thermometer and vaginally with a thermistor attached to a fetal ECG scalp clip. Room temperature was simultaneously determined and maintained at approximately 25° C. Epidural analgesia was produced with 0.375% bupivacaine and meperidine was employed in doses of 100 mg. When maternal temperature exceeded 37.5° C, cultures were taken of maternal urine, vagina, and maternal and umbilical cord blood.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

In order to assess if the direction of a spinal needle affects the cephalad spread of local anesthetic in the subarachnoid space, 40 male patients scheduled for urologie surgery were randomly divided into 2 groups of 20 each. With all injections performed in the sitting position with 3 ml of 0.5% bupivacaine, durai puncture was performed at L3.4 with a 25-gauge needle equilibrated to body temperature. The needle was inserted at an angle of 50° or less (Group 1) or at 70–100° (Group 2). The supine horizontal position was taken 3 minutes after injection and sensory and temperature loss change were measured periodically for 30 minutes. Motor blockade was determined only after 30 minutes.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Inadvertent durai puncture during the performance of epidural blockade with a 17− or 18-gauge needle results in a 70% incidence of headache. The current study attempted to answer the question of headache incidence reduction by controlling the relationship of needle bevel to longitudinal durai fibers.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Fresh human postmortem thoracolumbar spinal dura mater was clamped in an apparatus permitting access to a 1-cm in diameter portion. The dura was connected to a reservoir system filled with artificial CSF set to produce a pressure of 12 cm H2O behind the exposed dura. Three types of spinal needles were studied: Quincke (22, 26 and 29-gauge), Whitacre (22-gauge) and Greene (26-gauge) with each needle making a single puncture with the bevel parallel and across the longitudinal fibers of the dura. Volume of CSF lost was measured for 5 minutes, speed of leakage was determined, and time for CSF to appear at the needle hub noted at both 1.2 and 5 kPa.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

In order to compare the effects of injection of an epidural dose of local anesthetic for cesarean section via the epidural needle or the epidural catheter, the authors studied 45 patients undergoing elective cesarean section. Following establishment of routine monitoring and fluid preloading, patients had 20 ml of 2% lidocaine with 1:200,000 epinephrine injected over 2 minutes via a Tuohy needle or in fractionated doses via an epidural catheter. All patients had this injection preceded by a 3 ml test dose of anesthetic agent. After 20 minutes all patients had additional lidocaine added via a catheter if the upper level of analgesia had not attained T4. The quality of analgesia was assessed during surgery and the extent and degree of hypotension determined. Maternal blood and umbilical venous blood were obtained to determine levels of local anesthetic and blood gases.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

In view of the more rapid onset of epidural analgesia employing adjustment of pH with NaHCO3of solutions of lidocaine, prilocaine and bupivacaine, the authors compared plain and pH-adjusted 2%-chloroprocaine administered to parturients in the sitting and lateral position.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Increasing the pH of local anesthetic solutions has been reported to increase the speed of onset and the spread of analgesia. The usual means of increasing solution pH has been by the addition of NaHCO3. The current study was designed to assess the relative contributions of pH and PCO2.

ISSN:0275-665X    

出版商:OVID    

年代:1990

数据来源: OVID