1,264 research outputs found

    Projective reduction of the discrete Painlev\'e system of type (A2+A1)(1)(A_2+A_1)^{(1)}

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    We consider the q-Painlev\'e III equation arising from the birational representation of the affine Weyl group of type (A2+A1)(1)(A_2 + A_1)^{(1)}. We study the reduction of the q-Painlev\'e III equation to the q-Painlev\'e II equation from the viewpoint of affine Weyl group symmetry. In particular, the mechanism of apparent inconsistency between the hypergeometric solutions to both equations is clarified by using factorization of difference operators and the Ï„\tau functions.Comment: 27 pages, 10 figure

    Third-order integrable difference equations generated by a pair of second-order equations

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    We show that the third-order difference equations proposed by Hirota, Kimura and Yahagi are generated by a pair of second-order difference equations. In some cases, the pair of the second-order equations are equivalent to the Quispel-Robert-Thomson(QRT) system, but in the other cases, they are irrelevant to the QRT system. We also discuss an ultradiscretization of the equations.Comment: 15 pages, 3 figures; Accepted for Publication in J. Phys.

    Extension of the Adler-Bobenko-Suris classification of integrable lattice equations

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    The classification of lattice equations that are integrable in the sense of higher-dimensional consistency is extended by allowing directed edges. We find two cases that are not transformable via the 'admissible transformations' to the lattice equations in the existing classification.Comment: 14 pages, 2 figure

    Effect of ethanolic extract of Centella asiatica on maximal electroshock seizure in albino mice

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    Background: Animal models had always served as integral part in introducing newer drugs for epilepsy. India has long tradition of using herbal medicines. Centella asiatica is an ingredient of various ayurvedic preparations to treat brain related disorders like insanity, memory loss and epilepsy. This research is done to find out the usefulness of Centella asiatica in epilepsy.  Methods: Ethanolic extract of the plant is prepared using Soxhlet apparatus. Experimental seizure is induced in albino mice by maximal electroshock method. Resulting seizure goes through different phases. Duration of the phase of hind limb extension was the measured data. Clinically used anti epileptic drugs can abolish hind limb extension. Effect is compared to that of standard drug phenytoin. Four different doses of the plant extract; 100mg, 200mg, 500mg and 1000mg per kilogram bodyweight was given orally. Statistical analysis of data was done by one way ANOVA and Dunnett test.Results: Ethanolic extract of Centella asiatica exhibited statistically significant protection from maximal electroshock seizures. All given doses of the extract had p<0.05 when compared to control.Conclusions: Centella asiatica is potential source of anti-epileptic drug. Detailed phytochemical studies and animal experiments are recommended

    Effect of ethanolic extract of Centella asiatica on pentylene tetrazol induced seizure in albino mice

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    Background: Various preparations of the plant Centella asiatica were used in traditional medicine for treating memory disorders, insanity, epilepsy, headache, fever and dysentery. Hence this study was conducted to test the effect of Centella asiatica on classical animal model of epilepsy.Methods: First the ethanolic extract of Centella asiatica was subjected to acute toxicity study. Intraperitoneal injection of pentylene tetrazol in albino mice produces seizure. Plant extract was evaluated for protection from these experimental seizures. Four groups of animals were given the extract orally at 100mg, 200mg, 500mg and 1000mg per kilogram body weight. One group received phenobarbitone as standard drug and another group received distilled water as control. Time of onset of clonus is the study parameter. Statistical analysis of data was done using analysis of variance followed by Dunnet's test.Results: Various doses of plant extract ranging from 100mg to 1000mg/kg exhibited protection from experimentally induced seizures. Compared to control, the plant extract showed statistically significant delay in time of onset of clonus.Conclusions: Centella asiatica is potential source of anti-epileptic drug. Detailed phytochemical studies and animal experiments are recommended

    Robert’s uterus: a rare mullerian anomaly mystery unfolded

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    Anomalies of female genital tract may not be detected until after menarche when they present a cyclical pain due to outlet obstruction. Mullerian anomalies represent a vast array of structural abnormalities resulting from improper development and fusion of embryological mullerian ducts. 19-year-old girl attained menarche at the age of 14, had progressive dysmenorrhoea and diagnosed as right haemotosalphinx and ovarian endometrioma which were removed in 2008. As pain progressed, she underwent laparoscopic adhesiolysis in 2013. Since, pain persisted, diagnosed as right haematometra, and drainage done by laparotomy. Left adnexa were normal. She was given depot provera till she completed schooling. She developed recurrent dysmenorrhoea after stopping depot provera. USG and MRI revealed recurrent haematometra on right side with normal left horn. The possibility of atypical septum was thought about and hystero laparoscopy was done. It showed right side haemetometra with absent right adnexa. Left adnexa normal. Hysteroscopy showed normal left horn with septum with a bulge towards the left side. Hence, proceeded with hysteroscopic septostomy and haemetometra was drained to the left horn. Later patient was free from dysmenorrhea and repeat hysteroscopy was found to be normal. This case highlighting mullerian anomalies have to be considered when young girls present with severe progressive dysmenorrhoea and diagnosis remains a challenge most of the clinicians. This rare entity has to be kept in mind while evaluating such patients. Prompt diagnosis and early surgical correction are essential to avoid future morbidity in the form of repeated unnecessary surgeries

    Caesarean scar ectopic pregnancy

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    Ectopic pregnancy is a common cause of mortality and morbidity among the women of reproductive age group. Tubal pregnancy is the commonest.  It can occur in cervix, ovaries, previous caesarean scar, interstitial portion of the tube and abdominal cavity. Here we report a case of caesarean scar ectopic pregnancy which was managed conservatively. 31 yrs old gravid 3 previous 1 LSCS and 1 tubal ectopic come for antenatal consultation at 35 days of gestation. UPT was Positive. USG showed no evidence of intra uterine sac. Repeat scan after 10 days showed a gestational sac at the lower uterine segment scar. Hence it was decided for conservative management, injection methotrexate 50 mgm X 2 doses given. This was followed by misoprost vaginal insertion. Since patient did not expel the sac, injection PG F2 alpha 125 mg x 2 doses were given. Patient expelled the products of conception partially. This was followed by hysteroscopic guided evacuation.Caesarean scar ectopic was reported in 1978. Early diagnosis is by TV USG / MRI. Early ectopic can be treated medically. In delayed diagnosis, laparoscopic excision of the scar has to be done. In rupture of the scar site ectopic pregnancy laparotomy is indicated. In the event of heavy bleeding, hysterectomy has to be done. After conservative management and excision of the scar, fertility is not altered. Caesarean section scar pregnancy is a rare form of ectopic pregnancy which can lead to life threatening complications leading to mortality and morbidity. Treatment has to be individualized according to the gestational age, haemodynamic stability and desire for future fertility

    A study on pattern of adverse drug reaction in an adverse drug reaction monitoring centre of a tertiary care hospital in South Kerala, India

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    Background: Adverse drug reactions (ADR) are rated as fifth leading cause of death and accounts for approximately 5% of all hospital admissions. Under reporting of ADR from healthcare professional is considered as the contributing factor for increased morbidity and mortality. India has taken well appreciated step to launch Pharmacovigilance Programme of India (PvPI) to safeguard heath care of Indian population. This study looks into the detailed analysis of ADR reported to adverse drug reaction monitoring centre (AMC), Government Medical College, Trivandrum to assess its pattern, causality, severity and seriousness of ADR. Primary objectives of this study are the pattern of adverse drug reactions reported to ADR monitoring centre (AMC) and secondary objective is to assess causality, severity.Methods: A record based descriptive study was conducted in the ADR monitoring centre of government medical college, Trivandrum, Kerala from September 1st  2016 to February 2017(6 months). The data were collected from the all reported case records/ ADR report form of CDSCO. The details of the various adverse drug reactions were identified and analysed to find the pattern of adverse drug reactions including distribution of age, gender, causal drug group, system organ class. Also, an attempt is made to do causality assessment using WHO UMC scale and severity by using Heart wig Seigel Scale.Results: Out of 320 ADR cases, majority of reports were due to cutaneous manifestations. Most common ADRs were erythema, induration, and rash, itching. Females were 56% and males were 44%. Majority cases were of adult age group. Causality 91.88% were probably related, 75.6% were mild reaction. 25% of cases were serious. 77.5% were recovered. Antibacterial implicated 25(7.8%) followed by anti-epileptics 24 (7.5%) ADR.Conclusions: The pattern of adverse drug reactions reported to this AMC is comparable to the studies done in other parts of country. A strong need for streamlining of ADR monitoring system and reporting reemphasized by this study, which will promote the ADR reporting in healthcare professionals
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