The prevailing pattern of classroom interaction is a tripartite exchange structure known as IRF (teacher initiation, student response, teacher follow-up/feedback; Sinclair & Coulthard, 1975). Although it has its own contributions to classroom discourse, it has been criticized on several grounds, particularly for affording minimum learner participation opportunities (Kasper, 2001). An alternativ...

A combination of drugs may be preferred over the use of a single agent to induce deep sedation. A synergistic interaction between the drugs reduces the dose requirements of the drugs thereby minimising the unwanted side effects associated with each drug and improving recovery. The present study was undertaken to evaluate the suitability of dexmedetomidine and dexmedetomidine in combination with...

To estimate the effects of intramuscular meperidine analgesia on fetal heart rate (FHR) patterns compared with placebo. In a prospective randomized study, 150 healthy women with singleton term pregnancy requesting analgesia during active labor were planned to receive either intramuscular meperidin 50 mg (meperidin group) or normal saline (control group) when they requested analgesia. Fetal hear...

Three millititre of 0.75% plain bupivacaine and 0.5% amethocaine 3 ml in 5% glucose were used for spinal anaesthesia and compared in a double-blind study of 20 patients undergoing urological surgery. The onset time to maximum cephalad spread of sensory analgesia was approximately 45 min for bupivacaine and approximately 30 min in the amethocaine group (ns). The mean maximum spread of sensory an...

There is no consensus on the optimal local anesthetic agent to initiate labor analgesia for patients in active labor. Currently used local anesthetic agents for initiating labor analgesia include 0.25% bupivacaine, 0.5% bupivacaine, 0.2% ropivacaine without or with various types and doses of opioids. All these agents are administered in incremental doses and are relatively "slow onset" in initi...

Objective: The choice of analgesia in the management of post-thoracotomy pain remains controversial. Although several alternative forms of post-thoracotomy analgesia exist, all have their disadvantages. Cryoanalgesia, localized freezing of intercostal nerves, has been reported to have variable effectiveness and an incidence of long-term cutaneous sensory changes. We carried out an animal study ...