No Abstract

Background: The surgical management of liver injuries remains a great challenge for the traumatologists and general surgeons. We hypothesized that administration of 17 â-estradiol, a female sex hormone, improves hepatocellular healing after liver trauma.
Methods: In an experimental model, 60 rats were divided into six subgroups: A (male control), B (male and estradiol), C (castrated male and estradiol), D (female control), F (female and estradiol), and G (oopherectomized female). After inducing liver trauma, estradiol subgroups received 3 doses of intravenous 17 â-estradiol (1 mg/kg) every 8 hours. 2 weeks post trauma, animals were sacrificed and hepatocellular regeneration was measured with the help of stereologic parameters of regeneration. Hepatocellular healing was compared between previous left lobe samples and the new post-traumatic right lobe samples.
Results: Stereological parameters of rats receiving 17 b-estradiol after trauma was much better regarding mean angiogenesis point counting and volume density, compared with non-receiver groups after 2 weeks of trauma (P < 0.005). There was no significant difference for hepatocyte nucleus, hepatocyte point counting and volume density between estradiol receiver and non-receiver groups. In a comparison between subgroups, female sex had the same effect as giving estradiol. Oopherectomized female rats had more fibrogenesis but less angiogenesis (P < 0.005). Fibrogenesis was more in groups that were estradiol non-receiver (P < 0.005). In an explicit comparison of control females and males, estradiol infused males and females, and castrated male or oopherectomized female groups showed that stereological parameters of hepatocyte and hepatocyte nucleus were lower in female subgroups, but angiogenesis was better for female groups except for oopherectomized females.
Conclusions: This study did support the administration of exogenic female hormone as an approach to augment the angiogenesis as a good index of regeneration for traumatic liver in rats.

Background: Tracheostomy is a procedure which aims at better managing patients’ airway. It can be done using two methods: standard and percutaneous. The percutaneous method is a favorable choice for critically illpatients because it is a less invasive procedure. This study compares the short-term complications of these two methods (during 7 days after the procedure).
Methods: This study was a cross-sectional research performed on 50 ICU patients in need of tracheostomy.The patients were divided into two groups of percutaneous procedure (15 patients) and standard procedure(35 patients). The complications were registered in questionnaires and the data were analyzed using SPSS software (χ² test and t-test).
Results: The two groups had no significant difference in age, sex, and vital signs. Average duration of the procedure was 24.4 minutes in the standard procedure (10-45 minutes) and 26.78 minutes (5-70 minutes) in the percutaneous procedure, and there was no significant difference between two groups (P = 0.814). Average bleeding during 7 days after the procedure was 44 cc (10-150 cc) in standard procedure and 24.7 cc (10-50 cc) in the percutaneous procedure, and the difference was significant (P = 0.012). The other variables were not significantly different in two groups.
Conclusions: There was no difference in short-term complications between percutaneous and standard tracheostomy method should be selected considering other important factors.

Background: Thyroid nodules are a common clinical finding and differentiating benign ones from malignant ones is a clinical challenge. The aim of this study was to compare the rate of thyroid malignancies in patients with single thyroid nodules (STN) and multi-nodular goiter (MNG).
Methods: This retrospective study was conducted on 200 patients who underwent surgical thyroidectomy, between 2008 and 2010, in Shariati hospital, affiliated with Tehran University of Medical Sciences. Data analysis performed using SPSS (version 13).
Results: Of these, 63 patients (12 male and 51 female) had STN and 137 subjects (28 male and 109 female) were MNG. The mean ± standard deviation of age in patients with STN and MNG were 39.1 ± 7.1 and 42.7 ± 6.2, respectively. The two groups had no significant difference in age or sex. The rate of thyroid malignancies in patients with MNG and STN were 34.4% and 36.5% respectively, showing no significance difference.
Conclusions: The study did not show any statistically significant difference between the frequency of malignant and benign nodules in single and multiple thyroid. Therefore, performing accurate pathologic assessment is recommended for all cases of thyroid nodules (MNG or STN).

Background: The goals of this study are evaluation the effect of intravenous (IV) granisetron on the duration of sensory and motor block produced by intrathecal hyperbaric bupivacaine and also post-operative nausea and vomiting in patients undergoing outpatient cystoscopy.
Methods: 62 patients, undergoing cystoscopy received either 3 mg IV granisetron or placebo 15 minutes before the spinal block. Sensory and motor block were assessed after the intrathecal injection of bupivacaine every 2 minutes until the maximum block was achieved and thereafter every 15 minutes until recovery from the sensory and motor block.
Results: Demographic data were not statistically different in the study groups. Duration of sensory and motor block were also not statistically different between the study groups (P = 0.060 and P = 0.070 respectively). No patient in either group had vomiting. Seven patients in saline and zero patient in granisetron group had nausea that was statistically significant (P = 0.040). Time to discharge after surgery was 243 ± 21 and 239 ± 24 minutes in granisetron and control group respectively (P = 0.150).
Conclusions: Systemic granisetron had no effect on the duration of sensory and motor block produced by spinal anesthesia with hyperbaric bupivacaine.

Background: Chorionic villus sampling (CVS) and amniocentesis are two invasive methods of diagnostic approaches for prenatal diagnosis. The indication, adverse effects and final outcome of these two methods are different. The goal of this study was to compare indication, complications and outcomes of CVS and amniocentesis in pregnant women underwent prenatal screening program.
Methods: Medical records of 1464 women who underwent CVS, or amniocentesis were reviewed in two tertiary hospitals (imam and women hospitals, affiliated hospitals of Tehran University of Medical Sciences).
Results: For 1073 patients amniocentesis was performed while for 391 cases CVS was one. Mean maternal age, gestational age, and age at birth of the neonates were significantly lower in CVS group than the other group. Mean needle time was significantly higher in CVS group. Mean needle time was significantly higher in CVS Group (1.3 vs. 1.5, P < 0.001). The most finding of CVS result was minor Thalassemia while trisomy 21 was the most finding in amniocentesis group. Rupture of membranes was the most side effects in amniocentesis group and intrauterine fetal death was the most complication in CVS group.
Conclusions: Indication, results and complications of CVS and amniocentesis are different.

Large vessels injury is a rare but serious complication of percutaneous central venous catheter placement, which can be fatal. Herein a case of right innominate vein perforation during right internal jugular permcatheter placement - resulted in thoracotomy because of patient’s hemodynamic instability - is reported.