Minerva anestesiologica
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Minerva anestesiologica · Jun 2013
LACTATE or ScvO2 as an endpoint in resuscitation of shock states?
In the current management of critically ill patients, variables such as blood pressure, urine output or central venous pressure guide resuscitative efforts. Unfortunately, global tissue hypoxia may persist leading to multiple organ failure and death. To address tissue well-being, indices such as central venous oxygen saturation (ScvO2) and lactataemia are widely used and are strongly linked to outcome. ⋯ Herein, we review the physiology and rationale for ScvO2 and lactate monitoring. Clinical uses, evidence-based outcome implications and limitations are also examined to aid the clinician in daily practice. Key words: lactate, central venous oxygen saturation, shock, goal-directed therapy.
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Minerva anestesiologica · Jun 2013
Randomized Controlled Trial Comparative StudyA prospective, randomized controlled trial comparing the left lateral, modified lateral and sitting positions for spinal block characteristics for Cesarean delivery.
Maternal position affects spinal block characteristics. We investigated the effect of lateral, modified lateral and sitting position for spinal anesthesia with 2 mL hyperbaric bupivacaine 0.5% on spinal block characteristics in this prospective, randomized study. ⋯ Onset time (mean ± SD) for sensory block to T5 dermatome for the lateral, modified lateral and sitting groups was 6.8 ± 2.7, 13.6 ± 6.2 and 9.7 ± 5.5 min, respectively; P<0.001. The median (interquartile range) maximum dermatomal level was significantly lower in the modified lateral group (T5[T3-T5]) compared with the lateral (T3[T2-T4]) and sitting (T3[T3-T4]) groups, respectively; P=0.022 and P=0.030, respectively. Three women in the modified lateral group required general anesthesia compared with none in the other groups; P= 0.044. Apgar scores and cord blood pH, PO2 and PCO2 were similar between groups. Conclusion: The modified lateral position with 10 mg of hyperbaric bupivacaine was associated with a slower onset and a lower maximum sensory block necessitating higher requirement for conversion to general anesthesia. It did not offer any advantage over lateral and sitting positions for induction of spinal anesthesia for elective Cesarean delivery and cannot be recommended.
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Minerva anestesiologica · Jun 2013
ReviewTracheal intubation of patients in non-standard positions requires training.
In extreme emergency situations, patients may need to undergo endotracheal intubation, while in a non-supine position. This manuscript offers several options to the anesthesiologist to cope with tracheal intubations in non-standard positions. The authors stress that there is a need for adequate training in an anaesthesia skills lab, whereby classic direct laryngoscopy and indirect videolaryngoscopy should be practiced on manikins, before our trainees actually practice anesthesia on patients in operating theatres. This manuscript is also a plea for developing an algorithm for emergency airway management in the non-supine position.
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Minerva anestesiologica · Jun 2013
Improved ventilation-perfusion matching by abdominal insufflation (pneumoperitoneum) with CO2 but not with air.
Pneumoperitoneum (PP) by CO2-insufflation causes atelectasis however with maintained or even improved oxygenation. We studied the effect of abdominal insufflation by carbon dioxide (CO2) and air on gas exchange during PP. ⋯ CO2-PP enhanced the shift of blood flow towards better ventilated areas of the lung compared to Air-PP and SNP blunted the effects seen with CO2-PP. SNP may thus have blunted and CO2 potentiated vasoconstriction, by hypoxic pulmonary vasoconstriction or another mechanism.