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The Effects of Topical Metronidazole on Post-Hemorrhoidectomy Pain: A Brief Report
Pourghassem J,Mahoori A,Akhbari P
Tehran University Medical Journal , 2012,
Abstract: Background: Oral metronidazole has been previously demonstrated to decrease postoperative pain after open hemorrhoidectomy. The aim of this study was to evaluate the effect of topical metronidazole in reducing postoperative pain of hemorrhoidectomy.Methods : In this double-blind, clinical trial forty 20- to 40-year old male patients were scheduled for hemorrhoidectomy under spinal anesthesia at the Imam Khomeini Hospital in Urmia, Iran from April to September 2010. The participants were assigned to receive topical metronidazole (n=20) or placebo (n=20). Pain intensity was assessed using a visual analog scale (VAS), the time of first narcotic request and morphine administrations were also recorded. Results : The VAS scores were lower in metronidazole than the control group but this difference was not statistically significant, except after 24 hr post-surgically. Morphine administration in the first 24 hr was lower in the metronidazole group (P<0.05).Conclusion: Although metronidazole could not prolong the time of first analgesic request, but application of metronidazole gel is associated with lower analgesic requirement.
Diclofenac suppository versus intramuscular pethidine in post herniorrhaphy pain relief
Noroozinia H,Mahoori A,Hassani E,Akhbari P
Tehran University Medical Journal , 2011,
Abstract: "n Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} Background: Non-steroidal anti-inflammatory drugs (NSADs) and opioids are frequently administered to relieve postoperative pain. Uncontrolled postoperative pain may produce a range of detrimental acute and chronic health consequences and increase mortality and morbidity. Practically, the analgesic efficacy of opioids is typically limited by the development of tolerance to them or by opioid-related side-effects such as nausea, vomiting, sedation or respiratory depression. This study aims to assess the effects of suppository diclofenac on post-herniorrhaphy pain management."n"nMethods: In this prospective double-blind clinical trial, 60 patients who were candidate for the surgical repair of inguinal hernia were divided into two groups. Patients in group A received 100 mg of suppository diclofenac and patients in group B 50 mg of pethidine after the induction of anesthesia and before surgical incision. Postoperative pain assessment was done by an unbiased observer on the arrival of patients in the recovery room, using a 10-cm visual analogue scale (VAS( at 2-hour intervals for 6 hours."n"nResults: Pain relief was similar in the two groups (P=0.3). Patients in group B required more analgesia two hours post-operatively (P=0.03), while patients in group A had more favorable results regarding pain control (P<0.05). Statistically, there was no difference between the two groups at other intervals. The occurrence of nausea and vomiting was similar in both groups. No respiratory depression was observed in the patients."n"nConclusion: Preventive analgesia with 100 mg of suppository diclofenac after anesthesia induction for herniorrhaphy produced effective postoperative analgesia with minimum side-effects.
Photodegradation and removal of phenol and phenolic derivatives from petroleum refinery wastewater using nanoparticles of TiO2
F. Shahrezaei, A. Akhbari, A. Rostami
International Journal of Energy and Environment , 2012,
Abstract: This study explores the potential application of TiO2 photocatalysis as primary degradation system of phenol and phenolic derivatives from refinery wastewater. The removal of phenol was investigated in terms of various parameters namely: pH, temperature and catalyst concentration. Determination of phenol and phenolic derivatives compounds is carried out by gas chromatography using a flame ionization detector. In order to analyze the process, chemical oxygen demand fraction (R) was studied. The region of the exploration for the process was taken as the area enclosed by pH (2-10), temperature (293-318 k) and catalyst concentration (10-200 mg/l) boundaries. The optimum conditions for phenol and phenolic derivatives removal were found to be 3, 318 k and 100 mg/l, respectively, for pH, temperature and catalyst concentration. The results showed that, at optimum conditions, remarkable removal of 90% of phenol after 2 h can be achieved. The main feature of this work is the use of inexpensive and recoverable catalyst and may be considered for preliminary application in the refinery wastewater treatments after physicochemical treatments to avoid solids and colloids.
Familial Chondrocalcinosis: Report of the Case in Two Sisters
H. Akhbari,A.R. Ehsanbakhsh
Iranian Journal of Radiology , 2007,
Abstract: Chondrocalcinosis is a chronic and progressive inflammatory joint disease with acute episodes of arthritis, which may be associated with other metabolic diseases or transmitted as a genetic disorder. We report a case of chondrocalcinosis in two sisters.
State-Dependent Relay Channel with Private Messages with Partial Causal and Non-Causal Channel State Information
Bahareh Akhbari,Mahtab Mirmohseni,Mohammad Reza Aref
Mathematics , 2010,
Abstract: In this paper, we introduce a discrete memoryless State-Dependent Relay Channel with Private Messages (SD-RCPM) as a generalization of the state-dependent relay channel. We investigate two main cases: SD-RCPM with non-causal Channel State Information (CSI), and SD-RCPM with causal CSI. In each case, it is assumed that partial CSI is available at the source and relay. For non-causal case, we establish an achievable rate region using Gel'fand-Pinsker type coding scheme at the nodes informed of CSI, and Compress-and-Forward (CF) scheme at the relay. Using Shannon's strategy and CF scheme, an achievable rate region for causal case is obtained. As an example, the Gaussian version of SD-RCPM is considered, and an achievable rate region for Gaussian SD-RCPM with non-causal perfect CSI only at the source, is derived. Providing numerical examples, we illustrate the comparison between achievable rate regions derived using CF and Decode-and-Forward (DF) schemes.
On the Capacity of Causal Cognitive Interference Channel With Delay
Mahtab Mirmohseni,Bahareh Akhbari,Mohammad Reza Aref
Mathematics , 2010,
Abstract: In this paper, we introduce the Causal Cognitive Interference Channel With Delay (CC-IFC-WD) in which the cognitive user transmission can depend on $L$ future received symbols as well as the past ones. Taking the effect of the link delays into account, CC-IFC-WD fills the gap between the genie-aided and causal 1cognitive radio channels. We study three special cases: 1) Classical CC-IFC (L=0), 2) CC-IFC without delay (L=1) and 3) CC-IFC with a block length delay (L=n). In each case, we obtain an inner bound on the capacity region. Our coding schemes make use of cooperative strategy by generalized block Markov superposition coding, collaborative strategy by rate splitting, and Gel'fand-Pinsker coding in order to pre-cancel part of the interference. Moreover, instantaneous relaying and non-causal partial Decode-and-Forward strategies are employed in the second and third cases, respectively. The derived regions under special conditions, reduce to several previously known results. Moreover, we show that the coding strategy which we use to derive achievable rate region for the classical CC-IFC achieves capacity for a special case of this channel. Furthermore, we extend our achievable rate regions to Gaussian case. Providing a numerical example for Gaussian CC-IFC-WD, we investigate the rate gain of the cognitive link for different delay values.
On the Capacity of Interference Channel with Causal and Non-causal Generalized Feedback at the Cognitive Transmitter
Mahtab Mirmohseni,Bahareh Akhbari,Mohammad Reza Aref
Mathematics , 2012, DOI: 10.1109/TIT.2012.2184844.
Abstract: In this paper, taking into account the effect of link delays, we investigate the capacity region of the Cognitive Interference Channel (C-IFC), where cognition can be obtained from either causal or non-causal generalized feedback. For this purpose, we introduce the Causal Cognitive Interference Channel With Delay (CC-IFC-WD) in which the cognitive user's transmission can depend on $L$ future received symbols as well as the past ones. We show that the CC-IFC-WD model is equivalent to a classical Causal C-IFC (CC-IFC) with link delays. Moreover, CC-IFC-WD extends both genie-aided and causal cognitive radio channels and bridges the gap between them. First, we derive an outer bound on the capacity region for the arbitrary value of $L$ and specialize this general outer bound to the strong interference case. Then, under strong interference conditions, we tighten the outer bound. To derive the achievable rate regions, we concentrate on three special cases: 1) Classical CC-IFC (L=0), 2) CC-IFC without delay (L=1), and 3) CC-IFC with unlimited look-ahead in which the cognitive user non-causally knows its entire received sequence. In each case, we obtain a new inner bound on the capacity region. Moreover, we show that the coding strategy which we use to derive an achievable rate region for the classical CC-IFC achieves the capacity for the classes of degraded and semi-deterministic classical CC-IFC under strong interference conditions. Furthermore, we extend our achievable rate regions to the Gaussian case. Providing some numerical examples for Gaussian CC-IFC-WD, we compare the performances of the different strategies and investigate the rate gain of the cognitive link for different delay values.
On the number of outer connected dominating sets of graphs
Saeid Alikhani,Mohammad H. Akhbari,Roslan Hasni
Mathematics , 2011,
Abstract: Let $G=(V,E)$ be a simple graph. A set $S\subseteq V(G)$ is called an outer-connected dominating set (or ocd-set) of $G$, if $S$ is a dominating set of $G$ and either $S=V(G)$ or $V\backslash S$ is a connected graph. In this paper we introduce a polynomial which its coefficients are the number of ocd-sets of $G$. We obtain some properties of this polynomial and its coefficients. Also we compute this polynomial for some specific graphs.
Three-User Cognitive Interference Channel: Capacity Region with Strong Interference
Mahtab Mirmohseni,Bahareh Akhbari,Mohammad Reza Aref
Mathematics , 2012,
Abstract: This study investigates the capacity region of a three-user cognitive radio network with two primary users and one cognitive user. A three-user Cognitive Interference Channel (C-IFC) is proposed by considering a three-user Interference Channel (IFC) where one of the transmitters has cognitive capabilities and knows the messages of the other two transmitters in a non-causal manner. First, two inner bounds on the capacity region of the three-user C-IFC are obtained based on using the schemes which allow all receivers to decode all messages with two different orders. Next, two sets of conditions are derived, under which the capacity region of the proposed model coincides with the capacity region of a three-user C-IFC in which all three messages are required at all receivers. Under these conditions, referred to as strong interference conditions, the capacity regions for the proposed three-user C-IFC are characterized. Moreover, the Gaussian three-user C-IFC is considered and the capacity results are derived for the Gaussian case. Some numerical examples are also provided.
Effect of Mentha longifolia on FSH Serum Level in Premature Ovarian Failure  [PDF]
Roshanak Mokaberinejad, Elham Akhtari, Mojgan Tansaz, Soodabeh Bioos, Mohammad Kamalinejad, Nafiseh Zafarghandi, Ali Ghobadi, Farnaz Sohrabvand, Ali Akhbari
Open Journal of Obstetrics and Gynecology (OJOG) , 2014, DOI: 10.4236/ojog.2014.47053
Abstract:

Purpose: Premature ovarian failure (POF) includes cessation of normal ovarian function before age 40, causing amenorrhea, menopausal symptoms and general health problems. Hormone replacement therapy (HRT) can be administered in order to prevent menopausal symptoms, osteoporosis and vascular complications. Due to the contraindications and side effects of HRT and the increasing demand for alternative therapeutic modalities, we used Mentha longifolia, which is known in the Iranian traditional medicine (ITM), as being able to cause menstrual bleeding in women with early amenorrhea and decreased FSH serum. Methods: In this pilot study, we report twenty seven amenorrheic women with POF who were referred to the Iranian traditional medicine clinic in Tehran and treated by Mentha longifolia. All those patients had high FSH levels and amenorrhea. They were in their fertility age, between 30 to 40 years old. They were asked to take a cup of herbal tea which was steeped with Mentha longifolia tea three times a day for 2 weeks in 3 menstural cycles. If the patients developed menstruation, the FSH serum level was measured immediately; otherwise they had an FSH measurement one month after the beginning of therapy. Results: Mean age of patients was 36.44 ± 1.5 years. Mean FSH level before treatment was 79.13 ± 19.17 mIU/ml, and after treatment was 27.83 ± 16.14 mIU/ml. In four patients who did not have any response, mean range of FSH was 82.37 ± 19.75 mIU/ml before treatment and afterwards it was 81.97 ± 21.52 mIU/ml. After treatment with herbal teas, there was a significant decrease in FSH (79.39 ± 19.17 to 27.83 ± 16.14 mIU/ml, p value < 0.001). All patient except four (14.81%) had mensturation after taking the herbal medicine. Those four patients showed no decrease in FSH level. More of the patients who used medicinal tea achieved regular monthly bleeding when followed for three cycles.

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