Anesthesia and analgesia
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Anesthesia and analgesia · Oct 2001
Case ReportsThe anesthetic management of a case of tracheogastric fistula.
A 68-yr-old man developed a tracheogastric fistula after esophageal resection with gastric interposition. We report the anesthetic management of this patient undergoing tracheal repair and fistula closure.
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Anesthesia and analgesia · Oct 2001
Epidural labor analgesia and neonatal sepsis evaluation rate: a quality improvement study.
Labor epidural analgesia (LEA) is allegedly associated with maternal fever and an increase in the newborn sepsis work-up (SWU) rate. In this study, we evaluated whether LEA causes an increase in the SWU rate compared with a Control group given parenteral narcotics for labor pain. Maternal and neonatal data were collected prospectively for a continuous quality improvement database. Odds ratios were calculated by using multiple logistic regression for various triggers for SWU in the neonate. Of the 1177 primiparous women and their neonates studied, 922 women received LEA and 255 women received parenteral analgesics. A small but statistically significant increase in maternal and neonatal temperatures occurred in parturients receiving LEA. The SWU rates were 7.5% in the LEA group and 9.4% in the Controls (not significant). Triggers identified for SWU were birth weight (odds ratio = 116, P = 0.000), gestational age (odds ratio = 86.6, P = 0.000), meconium aspiration and respiratory distress requiring intubation (odds ratio = 8.6, P = 0.000), hypothermia at birth (odds ratio = 7.1, P = 0.001), maternal Group B beta-hemolytic streptococcal colonization (odds ratio = 6, P = 0.000), and preeclampsia or hypertension (odds ratio = 3.5, P = 0.03). There was no association between LEA and SWU. ⋯ Although it has been suggested that epidural analgesia for labor contributes to an increase in neonatal sepsis work-up (SWU), this retrospective analysis shows that epidural analgesia is not associated with an increase in SWU. The factors that were found to contribute to SWU included low birth weight, low gestational age, meconium aspiration or respiratory distress at birth, hypothermia at birth, maternal group B beta-hemolytic colonization, and preeclampsia or hypertension.
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Anesthesia and analgesia · Oct 2001
Case ReportsAnesthetic management of acquired tracheoesophageal fistula: a brief report.
Tracheoesophageal fistula may be either a congenital lesion or an acquired condition, most often resulting from foreign body ingestion. Location of the lesion has implications for anesthetic management and single lung ventilation may be required to facilitate surgical repair. In pediatric patients, intentional mainstem intubation may be required.
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Anesthesia and analgesia · Oct 2001
The dynamics of vascular volume and fluid shifts of lactated Ringer's solution and hypertonic-saline-dextran solutions infused in normovolemic sheep.
Infusions of hyperosmotic-hyperoncotic solutions such as hypertonic saline dextran (HSD) are used in Europe for resuscitation of traumatic shock and perioperative volume support as an adjunct to conventional isotonic crystalloids. Whereas plasma volume expansion of HSD has been measured at single time points after the intravascular volume expansion, the detailed time course of fluid shifts during and after infusions have not been reported. We compared the time course of volume expansion during and after 30-min infusions of 4 mL/kg HSD and 25 mL/kg lactated Ringer's solution (LR) in normovolemic conscious splenectomized sheep. Peak plasma volume (Evans blue and hemoglobin dilution) expansion was similar for HSD (7.8 +/- 0.9 mL/kg) and the larger sixfold volume of LR (7.2 +/- 0.5 mL/kg). However, 30 min after the 30-min infusion (T60), plasma expansion remained larger after HSD (5.1 +/- 0.9 mL/kg) than after LR (1.7 +/- 0.6 mL/kg). Both solutions caused an equivalent diuresis. Intravascular volume expansion efficiency (VEE), defined as milliliter plasma expansion/milliliter fluid infused at 0 (T30), 30 (T60), and 60 (T90) min after infusion ended was 1.8, 1.3, and 0.8, respectively for HSD, whereas LR provided a VEE of only 0.27, 0.07, and 0.07. The relative expansion efficiency of HSD versus LR, calculated as the ratio (VEE(HSD)/VEE(LR)), was 7-fold that of LR at the end of infusion T30, and 20-fold at T60, but decreased to 9-fold by T120. Intravascular volume dynamic studies of different volume expanders in animals and patients may provide anesthesiologists with a new tool for monitoring the effectiveness of fluid therapy. ⋯ Hypertonic saline dextran (HSD) is a new plasma expander recently approved for clinical use in Europe. We compared the plasma volume expansion of HSD versus lactated Ringers (LR) in normovolemic sheep. After a 30 min infusion, HSD was 7 times as effective at expanding volume as an equal volume of LR, but for the next 90 minutes the relative effectiveness of HSD increased to 10-20 times.
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Anesthesia and analgesia · Oct 2001
The incidence of class "zero" airway and the impact of Mallampati score, age, sex, and body mass index on prediction of laryngoscopy grade.
In an earlier study we proposed the addition of a new airway class, zero (visualization of the epiglottis), to the four classes of the modified Mallampati classification. In this prospective study, 764 surgical patients were assessed with regard to their airway class (including class zero), laryngoscopy grade, and the effect of the airway class and other predictors on the laryngoscopy grade.