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Biomedical subjects

P I Murray

Publications and source records attributed to P I Murray.

At least 19 recordsLinked to original sources
PubMed2006

Penetrating ocular injuries in the home.

BACKGROUND: We studied the prevalence and aetiology of penetrating ocular injuries, in particular ones that were sustained whilst undertaking Do It Yourself (DIY) or gardening in the domestic environment. We also examined the extent of eye safety promotion in DIY stores and garden centres and on their websites. METHODS: We conducted a case note review of patients who underwent surgery for penetrating ocular trauma between January 2000 and June 2004. Eight DIY stores and garden centres and 10 websites were visited and evaluated using standardized questions. RESULTS: Of the 85 patients identified, 35 (41.2%) patients had injuries that occurred in the home with 10 patients having visual acuities of <6/60 at final follow up. Accidents from DIY or gardening were the cause in 17 of 33 (51.5%) patients, with a failure to wear eye protection in all cases. Overall, DIY stores and garden centres were poor at promoting eye safety both in their stores and on their websites. CONCLUSION: The home is a frequent place for severe penetrating ocular injury, with highly popular pastimes such as DIY and gardening as common causes. As many of these injuries are preventable, additional safety information is essential to educate the public on the potential dangers of these pastimes.

Accidents, Home↗
PubMed2006

Adalimumab for sight-threatening uveitis in Behçet's disease.

AIMS: To describe the clinical outcome of three patients with Behçet's disease maintained on infliximab who were switched to adalimumab therapy. METHODS: Case note review. Main outcome measure was recurrence of uveitis. RESULTS: All patients remained free of recurrence with stable visual acuities. CONCLUSIONS: Adalimumab appears to maintain disease remission in Behçet's disease.

Adalimumab↗
PubMed2005

Ocular findings in patients with solid tumours treated with the epidermal growth factor receptor tyrosine kinase inhibitor gefitinib ('Iressa', ZD1839) in Phase I and II clinical trials.

PURPOSE: To describe the strategy used for large-scale ophthalmological monitoring in the clinical development of the novel anticancer agent gefitinib ('Iressa', ZD1839), an epidermal growth factor receptor tyrosine kinase inhibitor, which had demonstrated ocular effects in preclinical animal models. METHODS: In this extensive clinical trial programme, patients in Phase I and II trials underwent frequent and intensive ophthalmological monitoring at baseline and during the trials. Data were reviewed by an external independent Ophthalmology Advisory Board. RESULTS: Ophthalmological data for 221 patients in Phase I trials of gefitinib and 425 patients in Phase II trials revealed no evidence of any consistent or drug-related ophthalmological toxicity. Interestingly, the baseline data revealed that, in an asymptomatic population, transient ophthalmological events are identified during monitoring. CONCLUSIONS: This study reports the methodology and normative data in an ophthalmological screening programme that should prove useful for future studies.

Adult↗
PubMed2005

The first cut is the deepest: basic surgical training in ophthalmology.

PURPOSE: To examine the basic surgical training received by Senior House Officers (SHOs) in ophthalmology and the influence on training of sociodemographic and organisational factors. METHODS: Cross-sectional survey of SHOs in recognised UK surgical training posts asking about laboratory training and facilities, surgical experience, demographic details, with the opportunity to add comments. RESULTS: A total of 314/466 (67%) questionnaires were returned. In all, 67% had attended a basic surgical course, 40% had access to wet labs and 39% had spent time in a wet lab in the previous 6 months. The mean number of part phakoemulsification (phako) procedures performed per week was 0.79; the mean number of full phakos performed per week was 0.74. The number of part phakos performed was negatively correlated, and the number of full phakos completed was positively correlated, with length of time as an SHO. Respondents who had larger operating lists performed more full phakos per week (P<0.001). Compared to men, women were less likely to have access to a wet lab (P=0.013), had completed fewer full phakos per week (P=0.003), and were less likely to have completed 50 full phakos (P=0003). SHOs' comments revealed concerns about their limited 'hands on' experience. CONCLUSIONS: There are significant shortcomings in the basic surgical training SHOs receive, particularly in relation to wet lab experience and opportunities to perform full intraocular procedures. SHOs themselves perceive their training as inadequate. Women are disadvantaged in both laboratory and patient-based training, but minority ethnic groups and those who qualified overseas are not.

Adult↗
PubMed2005

Unregistered visual impairment: is registration a failing system?

BACKGROUND/AIMS: To assess the current level of under-registration of blindness and partial sight among patients attending a large teaching hospital, and to determine any risk factors for under-registration. METHODS: Medical records of all patients attending general ophthalmology outpatient clinics over a 3 month period were included in a retrospective analysis of registration rates; questionnaire survey assessing the level of knowledge of registration practices among 35 ophthalmologists working in the West Midlands. RESULTS: 146/2161 (7%) patients were eligible for blind or partial sight registration, or were in possession of a completed BD8 form. Of these 146 patients, 65 (45%) were unregistered with 18 fulfilling the criteria for blind and 47 for partially sight. In addition, 32/81 (40%) registered patients appeared to have been inappropriately registered. Partially sighted patients were more likely to be unregistered than blind patients (OR 2.31, 95% CI 1.15 to 4.63, p = 0187), and patients from ethnic minorities were more than three times more likely to be unregistered than white patients (OR 3.23, 95% CI 1.56 to 6.65, p = 0.0015). A patient with a treatable condition was more likely to be unregistered than a patient with an untreatable condition (OR 4.87, 95% CI 2.10 to 11.33, p = 0.0002). The overall level of knowledge of registration practices among doctors was found to be low and there was no indication of increasing knowledge with increasing experience. CONCLUSIONS: There has been little improvement in registration rates of visually impaired patients over the past decade. Ophthalmologists lack the necessary knowledge to cater for visually impaired patients' needs.

Adolescent↗
PubMed2004

Brown deposits in the optic of foldable intraocular lenses in patients with uveitis.

PURPOSE: To report a new finding of brown deposits scattered in the substance of the optic of foldable intraocular lenses (IOL) following phakoemulsification in patients with uveitis. METHODS: Consecutive uveitis patients (54 patients, 71 eyes) who had undergone phakoemulsification with a foldable posterior chamber IOL between March 1996 and November 2000 were studied. A variety of biomaterials from seven different manufacturers had been implanted. One masked observer using slit-lamp biomicroscopy assessed deposits in the substance of the optic of the IOL. RESULTS: Brown deposits were detected in the substance of the optic of 25/71 (35%) IOLs with 18/22 (82%) of AcrySof MA60BM IOLs being affected. Using logistic regression analysis, the AcrySof MA60BM IOL was significantly associated with the presence of deposits (adjusted odds ratio=38.5, 95% CI 6.9-200, P<0.001). Using multiple regression analysis, there was a significant association between the severity of deposits and the use of the AcrySof MA60BM IOL (P=0.005). Compared with other foldable IOLs implanted, the AcrySof MA60BM IOL was 38.5 times more likely to develop intra-IOL deposits. There was no association with those eyes that had undergone increased intraocular manipulations. The deposits did not appear to affect visual acuity. CONCLUSIONS: To our knowledge the finding of brown intra-IOL deposits has not previously been described. These deposits are more frequent in the AcrySof MA60BM implant than the other foldable implants studied. They share some similarities with glistenings, but their exact nature remains unknown.

Adult↗
PubMed2004

Ophthalmic manifestations of acute leukaemias: the ophthalmologist's role.

With evolving diagnostic and therapeutic advances, the survival of patients with acute leukaemia has considerably improved. This has led to an increase in the variability of ocular presentations in the form of side effects of the treatment and the ways leukaemic relapses are being first identified as an ocular presentation. Leukaemia may involve many ocular tissues either by direct infiltration, haemorrhage, ischaemia, or toxicity due to various chemotherapeutic agents. Ocular involvement may also be seen in graft-versus-host reaction in patients undergoing allogeneic bone marrow transplantation, or simply as increased susceptibility to infections as a result of immunosuppression that these patients undergo. This can range from simple bacterial conjunctivitis to an endophthalmitis. Leukaemia can present as pathology in the adnexae, conjunctiva, sclera, cornea, anterior chamber, iris, lens, vitreous, retina, choroid, and optic nerve. Recognition of the varied ocular presentations is also important in assessing the course and prognosis of leukaemia. We have presented a systematic approach taking each part of the eye in turn and outlining how leukaemia has been shown to affect it.

Acute Disease↗
PubMed2004

Degree, duration, and causes of visual loss in uveitis.

BACKGROUND/AIMS: Uveitis is a major cause of visual morbidity in the working age group. The authors investigated the duration, degree, and causes of visual loss in uveitis patients with the aim of better defining the visual morbidity and identifying potential risk factors. METHODS: A retrospective, non-interventional, observational survey of 315 consecutive patients attending a tertiary referral uveitis service. RESULTS: The mean duration of follow up was 36.7 months. Reduced vision (< or =6/18) was found in 220/315 (69.95%) of the patients with a subset of 120 patients having vision < or =6/60. Unilateral visual loss occurred in 109 (49.54%), while 111 (50.45%) had bilateral loss. The mean duration of visual loss was 21 months. Of the 148 patients with pan-uveitis, 125 (84.45%) had reduced vision, with 66 (53%) having vision < or =6/60. Main causes of visual loss were cystoid macular oedema (CMO) (59/220, 26.8%), cataract (39/220, 17.7%), and combination of CMO and cataract (44/220, 20%). The following were predictive of a poorer visual prognosis: pan-uveitis (p = 0.0005), bilateral inflammation (p = 0.0005), increasing duration of reduced vision (p = 0.0005), an Indian or Pakistani ethnic background (p = 0.004), and increasing patient age (p = 0.02). CONCLUSION: Prolonged visual loss occurred in two thirds of uveitis patients, with 70 (22%) patients meeting the criteria for legal blindness at some point in their follow up. Older patients with bilateral inflammation and an increasing duration of reduced vision are at the greatest risk of severe visual loss (< or =6/60). CMO and cataract were responsible for visual loss in 64.5% of patients.

Adolescent↗
PubMed2004

The state of basic surgical training in the UK: ophthalmology as a case example.

Concern is being expressed about the state of basic surgical training in the context of growing demands to improve service provision in the National Health Service. Taking ophthalmology as a case example, we sent questionnaires to all 466 senior house officers (SHOs) in recognized surgical training posts in England, Wales, Scotland and Northern Ireland. The main outcome measures were intraocular surgery performed in the previous two weeks and since starting as an SHO in ophthalmology; access to protected teaching time or cases on theatre lists; and supervision during surgery. Phakoemulsification, the most common type of cataract surgery, was used as a generic indicator of intraocular procedures. 314 (67%) of the SHOs responded. Of those working in the hospital in the previous two weeks, 50% had performed at least one component part of a phakoemulsification (phako) operation and 44% had performed at least one full phako operation. The average number of full phako operations done per week was 0.741. 77% reported some protected surgical teaching time over the two weeks and those with protected teaching time reported more full phako operations per week. Of those who had performed at least one surgical procedure in the previous two weeks, 79% had been supervised by a consultant. Of those who had completed two or more years' training as an SHO, only 42% met the Royal College of Ophthalmologists minimum requirement of 50 complete intraocular operations performed under supervision. Women were less likely than men, and SHOs in district general hospitals were less likely than those in teaching hospitals, to have achieved this target. As many as half the SHOs in ophthalmology are not receiving an adequate basic surgical training. If this continues it may prove difficult to train sufficient new surgeons to an acceptable standard to meet the increasing demands of an ageing population. This is not an issue for ophthalmology alone but for all surgical specialties.

Adult↗
PubMed2003

Inhibition of 11beta-hydroxysteroid dehydrogenase type 1 lowers intraocular pressure in patients with ocular hypertension.

BACKGROUND: Intraocular pressure (IOP) is maintained by a balance between aqueous humour (AH) production (dependent on sodium transport across a ciliary epithelial bi-layer) and drainage (predominantly through the trabecular meshwork). In peripheral epithelial tissues, sodium and water transport is regulated by corticosteroids and the 11beta-hydroxysteroid dehydrogenase (11beta-HSD) isozymes (11beta-HSD1 activating cortisol from cortisone, 11beta-HSD2 inactivating cortisol to cortisone). AIM: To analyse expression of 11beta-HSD in the human eye and investigate its putative role in AH formation. DESIGN: Multipart prospective study, including a randomized controlled clinical trial. METHODS: The expression of 11beta-HSD1 in normal human anterior segments was evaluated by in situ hybridization (ISH). RT-PCR for 11beta-HSDs, glucocorticoid and mineralocorticoid receptors (GR, MR) was performed on human ciliary body tissue. AH cortisol and cortisone concentrations were measured by radioimmunoassay on specimens taken from patients with primary open-angle glaucoma (POAG) and age-matched controls. Randomized, placebo-controlled studies of healthy volunteers and patients with ocular hypertension (OHT, raised IOP but no optic neuropathy) assessed the effect of oral carbenoxolone (CBX, an inhibitor of 11beta-HSD) on IOP. RESULTS: ISH defined expression of 11beta-HSD1 in the ciliary epithelium, while RT-PCR analysis of ciliary body tissue confirmed expression of 11beta-HSD1, with additional GR and MR, but not 11beta-HSD2 expression. In both POAG patients and controls, AH concentrations of cortisol exceeded those of cortisone. The CBX-treated healthy volunteers who demonstrated the largest change in urinary cortisol metabolites, indicative of 11beta-HSD1 inhibition, had the greatest fall in IOP. Patients with OHT showed an overall reduction of IOP by 10% following CBX administration, compared to baseline (p<0.0001). DISCUSSION: CBX lowers IOP in patients with ocular hypertension. Our data suggest that this is mediated through inhibition of 11beta-HSD1 in the ciliary epithelium. Selective and topical inhibitors of 11beta-HSD1 could provide a novel treatment for patients with glaucoma.

11-beta-Hydroxysteroid Dehydrogenase Type 2↗