PubMed Health⌕ Search

Biomedical subjects

M Walshe

Publications and source records attributed to M Walshe.

12 recordsLinked to original sources

Telephonic management of rectal bleeding in young adults: a prospective randomized controlled trial.

OBJECTIVE: The majority of young adults referred with rectal bleeding to a colorectal specialist clinic have a very low risk of serious disease such as cancer, and a high chance of gaining symptom relief by simple dietary changes. To determine whether young low-risk patients with rectal bleeding can be managed with a structured telephonic interview and dietary advice, rather than an outpatient visit. METHOD: A single-blinded, prospective, randomized controlled trial was performed in two stages. Patients under 40 years with rectal bleeding only were offered inclusion. Part-I trial: Patients were interviewed on telephone by the colorectal nurse specialist (CNS) and randomized to receive dietary advice (Advice Group) or not (Control Group). All patients were seen in clinic 6 weeks later by a doctor 'blinded' to their trial status. Part-II trial: Patients were interviewed on telephone by the CNS and again randomized to an Advice Group or a Control Group. The Control Group were seen in clinic 6 weeks later. The Advice Group were telephoned again 6 weeks later, and if their bleeding had stopped, were not brought to clinic. All patients were tracked for a year after the study to ensure no adverse diagnoses came to light. RESULTS: Part-I trial: 63 of 89 eligible patients were contactable and none refused the study. Seventy per cent of the Advice Group compared with 33% (P = 0.001) of the Control Group had symptomatic improvement when seen in clinic. Approximately 30% of each group required further treatment. Part-II trial: 54 of 94 eligible patients were contactable. However a further nine declined to enter the trial; 90% of patients in the Advice Group had improved at 6 weeks as judged by telephone interview compared with 56% of patients in the Control Group (P = 0.024) who were seen in clinic. The 90% of patients who improved in the Advice Group did not need to come to clinic to be seen. In both parts of the trial, the CNS identified a small number of patients with urgent symptoms at interview and brought them to clinic. The majority had anal fissures or haemorrhoids although in Part-II, one patient had ulcerative colitis and one had colorectal cancer. CONCLUSION: Telephonic consultation is an effective way of identifying those patients with urgent symptoms among a cohort of young adults referred to the hospital with rectal bleeding. Telephonic dietary advice leads to resolution of rectal bleeding in the majority of patients without urgent symptoms.

Adult↗

Is there an association between the COMT gene and P300 endophenotypes?

P300 wave anomalies correlate with genetic risk for schizophrenia and constitute a plausible endophenotype for the disease. The COMT gene is thought to influence cognitive performance and to be a susceptibility gene for schizophrenia. Unlike two previous studies, we found no significant influence of the COMT gene on P300 amplitude or latency in 189 individuals examined. The well-supported role of the COMT gene both in dopamine catabolism as well as in prefrontal cognition makes a strong theoretical case for the influence of COMT Val158Met polymorphism on P300 endophenotypes. However, the available neurophysiologic evidence suggests that any such association, if present, must be very subtle.

Adult↗

Obstetric complications in patients with schizophrenia and their unaffected siblings.

OBJECTIVE: We sought to explore whether obstetric complications (OCs) are more likely to occur in the presence of familial/genetic susceptibility for schizophrenia or whether they themselves represent an independent environmental risk factor for schizophrenia. METHODS: The presence of OCs was assessed through maternal interview on 216 subjects, comprising 36 patients with schizophrenia from multiply affected families, 38 of their unaffected siblings, 31 schizophrenic patients with no family history of psychosis, 51 of their unaffected siblings and 60 normal comparison subjects. We examined the familiality of OCs and whether OCs were commoner in the patient and sibling groups than in the control group. RESULTS: OCs tended to cluster within families, especially in multiply affected families. Patients with schizophrenia, especially those from multiply affected families, had a significantly higher rate of OCs compared to normal comparison subjects, but there was no evidence for an elevated rate of OCs in unaffected siblings. CONCLUSION: Our data provides little evidence for a link between OCs and genetic susceptibility to schizophrenia. If high rates of OCs are related to schizophrenia genes, this relationship is weak and will only be detected by very large sample sizes.

Adolescent↗

Studies on the determination of chlorotestosterone and its metabolites in bovine urine.

Chlorotestosterone and its metabolites were determined in urine samples from bovine animals treated with chlorotestosterone acetate by oral and intramuscular routes. Sample preparation, involving enzymatic deconjugation and solid-phase extraction, was optimised. The effect of different enzyme preparations, pH, and time of incubation were studied. An extraction/clean-up procedure based on solid-phase extraction (C18 cartridge) and liquid-liquid clean-up was developed. Determination of chlorotestosterone and its metabolites was by enzyme immunoassay and GC-MS. Metabolites were converted into their TMS-enol-TMS-ether and TMS-oxime-TMS-ether forms before GC-MS (EI) analysis.

Administration, Oral↗

The preparation of a molecular imprinted polymer to 7-hydroxycoumarin and its use as a solid-phase extraction material.

A molecular imprinted polymer (MIP) was prepared to 7-hydroxycoumarin (7-OHC). A number of preparation parameters were examined by ultraviolet (UV) spectroscopy, including the amount of solvent used for reaction, equilibration time, selectivity and capacity of material. The polymer which showed the most selectivity for 7-OHC was then packed into cartridges and used as a solid-phase extraction sorbent. An extraction procedure was then developed from first principles. The cartridges were examined for selectivity of 7-OHC over some other members of the coumarin family. 7-OHC was then extracted from urine using this solid-phase extraction (SPE) method, and its concentration determined using capillary zone electrophoresis (CZE). The method was found to be linear over the range 10-50 micrograms ml-1. Inter- and Intra-assay precision studies were performed to validate the method.

Drug Compounding↗

Comparison of two extraction methods for determination of propranolol and furosemide in human plasma by mixed-mode chromatography.

An isocratic high performance liquid chromatographic method is described for the determination of the beta-adrenergic blocking drug, propranolol, and the diuretic, furosemide, in human plasma. The two compounds and the internal standard were extracted from plasma using a two-step extraction technique. Propranolol and pindolol (internal standard) were first extracted from alkaline plasma into diethyl ether; this was followed by extraction of furosemide into acidified ether: hexane (65:35). The two extracts were then combined and evaporated under nitrogen, and the reconstituted residues were analysed on a C18/SCX reversed-phase/cation exchange column with a mobile phase of acetonitrile: 0.1 M sodium acetate pH 4 (33:67). The drugs and the internal standard were detected by UV absorption at 230 nm. The drugs were also extracted from plasma by a column-switching technique utilizing a ten-port valve. The drug compounds were retained on a C18 pre-column. A comparison of RSD for within-batch (intra-assay) and between-batch (inter-assay) runs for both methods was carried out, the liquid/liquid extraction method giving better recovery values. The calibration graphs were linear from 25-300 ng ml-1 for furosemide and 50-400 ng ml-1 for propranolol. Recovery values were > 90.0% by liquid/liquid extraction and > 76.0% by column switching.

Adrenergic beta-Antagonists↗

Incontinentia pigmenti associated with bilateral cleft lip and palate.

Incontinentia pigmenti (Bloch-Sulzberger syndrome) is an uncommon genodermatosis mainly affecting females. It consists of characteristic skin manifestations associated in 79.8% of patients with other systemic manifestations. Of these there have been five cases of palatal or lip abnormalities, none being bilateral cleft lip and palate. We describe a unique case of incontinentia pigmenti associated with a bilateral cleft lip and palate.

Cleft Lip↗

Facial developmental vascular anomalies.

Developmental vascular anomalies of the head and neck may give rise to profound esthetic problems that are a challenge to treat. These vascular anomalies may also be of significance in dentistry, particularly where extractions have to be carried out. This brief report describes a number of children who presented with different variations of these anomalies.

Adolescent↗