Modified trabeculectomy: a new procedure for neovascular glaucoma

A new surgical procedure has been described specifically for neovascular glaucoma with residual visual function. The procedure included excision of a large trabecular segment under a limbal-based scleral flap, partial non-penetrating cyclodiathermy, and partial ablation of abnormal iris vessels followed by a wide sector iridectomy. The preliminary results in five eyes with advanced neovascular glaucoma were encouraging.     

Gentamicin-PMMA beads in the treatment of chronic osteomyelitis

Fifty cases of chronic osteomyelitis, associated with septic arthritis in five cases, were treated with radical surgery, systemic antibiotics, and insertion of gentamicin-PMMA beads. Seven cases were lost to follow-up. The remaining 43 cases were followed up for an average of 14 months. All but four cases healed.     

Study guides: a study of different formats

More emphasis is being placed on students as independent learners with teachers acting as facilitators. It has been argued that student-centred learning can be supported usefully by study guides. This paper supports previous claims as to the value of study guides as perceived by students. But what should study guides look like? A total of 151 second-year medical students at the University of Dundee were given three versions of a study guide covering the topic of hypertension, each incorporating a different educational approach but with the same content. A timetable-based version of the guide focused on the students' day-to-day timetable and related the learning outcomes to each of the scheduled learning opportunities. A problem-based version of the guide introduced a clinical problem and encouraged the students to think of the learning outcome for the module as they related to the problem. Thirdly, an outcome-based version was structured round the 12 key areas of the learning outcomes. The timetable-based guide was preferred by the majority of students, although some preferred the problem-based guide and others the outcome-based guide. This may in part be due to students' lack of familiarity with a problem-based and outcome-based approach. It may also relate to what is seen as a key function of a study guide: to lead the student through the day-to-day learning experiences in a course and to introduce a student to a course or a topic and provide an overview of what is to be achieved in their studies of it.     

Transfusion Transmitted Infections in Armed Forces: Prevalence and Trends

Background

This study presents data on the prevalence rate of infectious markers among voluntary and replacement donors in the blood transfusion service in Armed Forces from 2000 to 2004.

Methods

39,646 units of blood were collected from donors during the period from 2000 to 2004. All the samples were screened for hepatitis B surface antigen (HBsAg), human immunodeficiency virus (HIV) 1&2, hepatitis C virus (HCV), and by venereal disease research laboratory test (VDRL).

Results

24,527 (61.9%) were voluntary donations and 15,119 (38.1%) replacement donations. Prevalence of HBsAg had decreased, amongst voluntary donors from 1.67% to 0.77% but the positivity rate has not showed significant change. Seropositivity of HIV had decreased both in voluntary and replacement donors to 0.22% and 0.86% respectively. The seropositivity for anti-HCV showed steady decrease amongst voluntary donors from 0.46% to 0.20% in 2004, but in replacement donors, there was an increase in reactivity rate from 0.43% to 0.65%.

Conclusion

The increased seropositivity for HCV, HIV and HBsAg could be decreased by introduction of nucleic acid amplification testing (NAT) in minipools for HCV and HIV and introduction of anti-HBcAg (IgM) for hepatitis B virus (HBV) infection. But this may not be possible in near future in developing countries due to financial constraints. At present implementation of strict donor criteria and with use of sensitive laboratory screening tests it is possible to reduce the incidence of transfusion transmitted infections (TTI) in Indian scenario.Key Words: Transfusion transmitted infections, Human immunodeficiency virus, Hepatitis C virus, Hepatitis B virus     

Evaluation of Suspected Monoclonal Gammopathies: Experience in a Tertiary Care Hospital

Background

Monoclonal gammopathies occurs in patients with malignant diseases of plasma cells and lymphocytes and in few benign conditions. The objective of this study was to assess the precision, accuracy and confirmation of monoclonal gammopathies on serum protein electrophoresis (SPE) and the clinical relevance of detection and characterization of M component.

Methods

All samples received for serum electrophoresis in the last 3 years were analysed for data on M band positivity and correlating it with clinical profile of the patients. Immunofixation (IFE), Immunoelectrophoresis (IEP) and IgG, IgM estimation were carried out in few cases. The follow up of cases was done by serial monitoring of SPE and β₂ microglobulin levels.

Results

1155 samples were received during the 3 years period. 282 (24.4%) samples were positive for M component on SPE. Of these, 239 (84.8%) patients had M spike in λ region and 43 patients had M spike in β region. The mean load of the M protein band in the λ region was 37.8% and in β region was 35.8%. IgG with κ chain was seen in 40%, IgG with λ chain was seen in 50%, 5% patients each had IgM with κ and IgA with λ light chain. 246 samples (96.5%) had high levels of β₂ microglobulin. Of the 116 cases of multiple myeloma, IgG levels was more commonly raised (5%) as compared to IgA (6.9%) and IgM (5.2%).

Conclusion

It is recommended that SPE should be performed in patients having unexplained weakness, anaemia, back pain, osteoporosis, osteolytic lesions, fractures, renal insufficiency or recurrent infections.Key Words: Serum protein, Electrophoresis, M band, Multiple myeloma     

Cervical Disc Replacement for Spondylotic Myeloradiculopathy

Background

Cervical disc replacement is a newer concept and rapidly developing surgical treatment. A prospective study was conducted to determine, if accurately implanted Bryan''s cervical disc prostheses can provide relief from objective neurological symptoms and signs, stability and normal range of motion in cases of cervical disc prolapse with myeloradiculopathy.

Material and Method

Twenty patients underwent Bryan cervical disc replacement from Jan 2002 to Dec 2003. Young patients between age groups 21 to 50 years with degenerative cervical disc prolapse at C3-C7 with myeloradiculopathy were included in this study. Patients with significant facet joint arthropathy, unstable spine, trauma, tumour, osteoporosis and active infection were excluded from this study. Nurick''s grading was used for quantifying the neurological deficit. Patients were operated by anterior cervical approach using a specially designed Bryan''s cervical discectomy system. Neurological and radiological outcome was assessed post operatively and at 2,6,12 and 24 months follow up. Outcome analysis was carried out using modified Odom''s criteria. The radiographic results were assessed by taking antero posterior (AP) and lateral radiographs of cervical spine to find range of motion and device position.

Results

The patients were in the age group of 31 to 50 years. There were 14 (70%) male and 6 (30%) female in this study. Neck pain and brachialgia were the presenting symptoms in all cases, 12 (60%) had radiculopathy and 8 (40%) had myelopathy. Single level disc prolapse was present as per Magnetic Resonance Imaging (MRI) in four (20%) at C4-C5, 12 (60%) at C5-C6 and 4 (20%) at C6-C7. Bryan''s disc size 15 was used in 8 (40%) and size 17 was used in 12(60%) patients. During post-operative, 02, 06, 12, and 24 months follow up, the clinical outcome was excellent in 16 (80%) and good in 4 (20%) as per modified Odom''s criteria. There was demonstrated improvement in flexion, extension and rotation clinically and radiologically during follow up. There was no migration or displacement of device.

Conclusion

Cervical disc replacement for cervical disc prolapse with myeloradiculopathy represents an exciting new technology. Patients treated with the Bryan cervical disc prosthesis for single level cervical disc prolapse showed good to excellent improvement in neurological deficit. Clinically and radiologically maintenance of motion was found during follow up. More patients with longer follow up and post operative MRI to find out the protection to adjacent discs from abnormal stress will be required before this prosthesis is accepted as a treatment option.Key Words: Spondylotic myeloradiculopathy, Cervical disc replacement