No abstract

The acrylic acids (I) mentioned in the title undergo cyclocondensation with acetylacetone (II), yielding the arylcyclohexenones (III).

Background & Purpose The effects of desflurane and sevoflurane, two commonly used inhalation anesthetics for the maintenance of general anesthesia, on peri- and postoperative bleeding is a focus of interest. This study conductd to evaluating that; Sevoflurane can cause bleeding tendencies more than Isoflurane anesthesia or not? Study design Prospective, randomized comparative study. Setting Ain shams university hospitals. Subjects We included 40 tonsillectomy patients (age from 2 – 12 years old), and classified them according to the anesthetic drug used into 2 independent groups: Isoflurane group (20 patients) and Sevoflurane group (20 patients). Methods All patients were subjected to full history taking, oral cavity examination, anterior rhinoscopy nasal examination, basic laboratory studies for bleeding tendencies (e.g. platelets and INR), adenoidal-tonsillectomy operational data (including operative time calculation), bleeding outcomes (blood loss and packs of blood transfusion) will be recorded, and half of the cases will be anesthetized with sevoflurane and another half with isoflurane. Results In the studied population, the mean age of all patients was (7.1 ± 2.7) years, with (57.5%) of patients were males; while (42.5%) were females. Regarding bleeding outcome data; the average blood loss of all patients was (15.5 ± 3.7) cc, and the average packs used were (4.2 ± 1.1). We found a significant decrease in operative time in the Isoflurane group; compared to the Sevoflurane group (p = 0.0017). Regarding Bleeding outcome data; we found, a significant decrease in blood loss, in the Isoflurane group; compared to the Sevoflurane group (p = 0.00014), and a significant decrease in the number of packs used, in Isoflurane group; compared to Sevoflurane group (p = 0.0018). Conclusion To conclude, anesthesia with isoflurane can lead to a lower amount of intraoperative bleeding compared with sevoflurane. Therefore, isoflurane may be preferred as an inhalational agent for the maintenance of general anesthesia during tonsillectomy and adenoidectomy operations.