Articles: general-anesthesia.
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An understanding of the physiological changes seen in late pregnancy, avoidance of the supine posture, together with routine administration of alkali during labour and a careful anaesthetic technique will enable the anaesthetist to avoid many of the potential problems of obstetric anaesthesia.
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A new ventilator for use during anaesthesia is described. It operates as a minute-volume divider and derives its power from the energy stored in a distended reservoir bag. ⋯ The nature of the inspired gas mixture is known accurately because the internal volume of the ventilator is small and the system is non-rebreathing. The design of the exhaust system facilitates ventilation monitoring, the use of positive end-expiratory pressure and connection to ducted pollution-control systems.
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Invest. Ophthalmol. Vis. Sci. · Jun 1977
The effects of ketamine sedation and ketamine-pentobarbital anesthesia upon the intraocular pressure of the rabbit.
The effect of ketamine sedation and ketamine-pentobarbital anesthesia upon the intraocular pressure (IOP) of the rabbit was studied by applanation pneumatonography. Peak values of IOP during both ketamine sedation and ketamine-pentobarbital anesthesia were reached 3 to 5 minutes after administration of the drug(s). The peak IOP increase during ketamine sedation (10 mg./kg. ⋯ The peak IOP increase with ketamine-pentobarbital anesthesia (50 mg./kg. ketamine IM + 30 mg./kg. pentobarbital IM) was 7.1 +/- 0.8 mm. Hg. Atropine premedication did not prevent the increase in IOP seen with ketamine sedation or ketamine-pentobarbital anesthesia.
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Anesthesia and analgesia · Mar 1977
Comparative StudyA comparison of general anesthesia and lumbar epidural analgesia for elective cesarean section.
Controversy exists concerning the choice of anesthetic technic for elective cesarean section. Several maternal and newborn parameters were compared during general anesthesia (GA) and lumbar epidural analgesia (LEA). ⋯ Umbilical artery and vein pH were better with GA, but 1-minute Apgar-minus-color scores were higher and time to sustained respiration was shorter with LEA. On the basis of this study, neither technic can be vigorously recommended over the other from the standpoint of the newborn's condition.