Browsing by Author "Raman, KT"

Now showing 1 - 5 of 5
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    An Unusual Cause of Iatrogenic Aortic Regurgitation
    (JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY, 2013) Sivasubramanian, S; Ponnusamy, SS; Raman, KT; Pillai, VV
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    Extra-anatomic neo-aorta for adult abdominal aortic coarctation
    (ANZ JOURNAL OF SURGERY, 2014) Savlania, A; Parameshwarappa, SK; Viswanathan, S; Raman, KT; Madathipat, U
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    Moderately Differentiated Peripheral Adenocarcinoma of the Lung With Cilia
    (INTERNATIONAL JOURNAL OF SURGICAL PATHOLOGY, 2014) Nair, AR; Samvedam, S; Madathipat, U; Raman, KT
    We report an extremely rare case in which cilia were identifiable on light microscopic examination in cells of a moderately differentiated peripheral adenocarcinoma in the lung. The cells were positive for cytokeratin 7, and the cilia were highlighted by epithelial membrane antigen staining. The prognostic significance of these extremely well-differentiated ciliated tumor cells will be known only with long-term follow-up of the patient and analysis of more such tumors.
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    Usefulness of flat detector CT (FD-CT) with biplane fluoroscopy for complication avoidance during radiofrequency thermal rhizotomy for trigeminal neuralgia
    (JOURNAL OF NEUROINTERVENTIONAL SURGERY, 2016) Easwer, HVI; Chatterjee, N; Thomas, A; Santhosh, K; Raman, KT; Sridhar, R
    Introduction Trigeminal neuralgia (TN) is characterized by episodes of shooting pain in the areas innervated by one or more divisions of the trigeminal nerve. The initial treatment of TN is with drugs but the increased frequency and intensity of the neuralgic episodes often force the patient to seek alternative therapies. Microvascular decompression (MVD) and radiofrequency thermal lesioning of trigeminal rootlets (RFTR) offer close to the best results for TN. MVD has the disadvantage of being an open surgical procedure with its attendant risks and longer hospital stay, whereas RFTR is a short, day-care' procedure. However this latter procedure involves positioning of the RF needle in the area behind the trigeminal ganglion through the foramen ovale, which can pose significant challenges. Objective To use the fluoroscopic support of a biplane catheter laboratory to access the foramen, and flat detector CT to confirm the location of the tip of the RF needle in the optimal position. Methods Fifty-three patients with TN underwent RFTR under local anesthesia with conscious sedation. Results All patients reported pain relief with hypesthesia over the offending trigeminal division. In seven patients the needle tip required repositioning according to the CT images. Two patients each had loss of corneal reflex and abducens nerve palsy after the procedure. No other complications were seen. Conclusions The superior view in two planes coupled with the anatomical confirmation of the position of the needle tip in the Meckel's cave during the rhizotomy reduces the need for multiple passages of the needle to access the foramen ovale and achieves accurate needle tip positioning. The technique increases the safety and precision of such treatments and helps to manage potential complications.
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    Utility of 3D SPACE T2-weighted volumetric sequence in the localization of spinal dural arteriovenous fistula
    (JOURNAL OF NEUROSURGERY-SPINE, 2016) Kannath, SK; Alampath, P; Rajan, JE; Thomas, B; Sarma, PS; Raman, KT
    OBJECTIVE The aim of this study was to investigate the utility of a heavily T2-weighted volumetric MRI sequence (3D sampling perfection with application-optimized contrasts using different flip-angle evolutions [SPACE]) in the feeder localization of spinal dural arteriovenous fistula (SDAVF). METHODS Patients who were diagnosed with SDAVF and who had 3D SPACE source images available for review were identified from a retrospective review of medical records. A total of 16 patients were identified, and MR images were analyzed separately by 2 blinded observers. The accuracy of the observation and interobserver agreement were measured by Kendall's tau and kappa statistics. RESULTS The site of fistula was accurately predicted by Observers 1 and 2 in 81% and 88% of cases, respectively, which improved to 94% when the level was considered within 1 vertebral level. The observer agreement with gold-standard angiography and interobserver agreement were found to be highly significant (p < 0.0001). CONCLUSIONS The 3D SPACE MRI sequence is valuable in the precise detection of the site of SDAVF. It may help to tailor digital subtraction angiography and thereby reduce the radiation exposure, contrast load, and study time.