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Somil Jaiswal, A.K. Chaudhuri, S.N. Ghosh, S. Ghosh, S.K. Saha and Pooja Jaiswal

Abstract

Aim: To compare two most common operative procedures used in patients with chronic subdural hematomas - Twist drill craniostomy and Burr Hole Craniostomy.

Material and Methods: The study was a prospective randomized controlled trial on patients with chronic subdural hematomas.

Results: Both procedures are comparable with respect to outcome but surgical duration is statistically higher in Burr Hole craniostomy than Twist Drill Craniostomy.

Conclusion: Twist Drill Craniostomy is procedure of choice in emergency surgical situation.

Open access

S. K. Ghosh and P. Chakrabarti

Abstract

The structural characterization of the olfactory epithelium in Pygocentrus nattereri Kner, 1858 was studied with the help of light as well as scanning and transmission electron microscope. The oval shaped olfactory rosette consisted of 26–28 primary lamellae radiated from midline raphe. The olfactory epithelium of each lamella was well distributed by sensory and non-sensory epithelium. The sensory epithelium contained morphologically distinct ciliated and microvillous receptor cells, supporting cells and basal cells. The non-sensory epithelium was made up of labyrinth cells, mucous cells and stratified epithelial cells. According to TEM investigation elongated rod emerging out from dendrite end of the receptor cells in the free space. The dendrite process of microvillous receptor cells contained microvilli. The supporting cells had lobular nucleus with clearly seen electron dense nucleolus. The apex of the ciliated non-sensory cells was broad and provided with plenty of kinocilia. Basal cells provided with oval nucleus and contained small number of secretory granules. The mucous cells were restricted to the non-sensory areas and the nuclei situated basally and filled with about two-third of the vesicles. The functional significance of various cells lining the olfactory epithelium was discussed with mode of life and living of fish concerned.

Open access

M. Banerjee, S. Ghosh and P. Chakrabarti

Abstract

The histological changes observed in the pituitary corticotrophs, gonadotrophs, adrenocortical tissues and testicular cells in M. vittatus (Bloch, 1794) have been studies during growth, maturation and spawning phases. The studies based on the changes observed in the cell types, shape and size of the cells of the adrenocortical tissues, testes and the overall percentage of gonadotroph (GTH) and thyrotroph (TSH) cells of the pituitary. However, during growth phase, in proximal pars distalis (PPD) the considerable increment of GTH and TSH have been observed having intense aniline blue stain. The corticotrophs (ACTH) also showed significant accumulation of fuchsinophilic cytoplasmic granules. The cytoplasmic features and the architecture of the interrenal cells were well coincident with the increase of different spermatogenic cells. During the maturation phase dense granulation in the GTH and TSH cells appeared to be concomitant with the spermiation. The amount of cytoplasmic granules of the interrenal cells increased than chromaffin cells and was well coincidence with the increase of spermatids and spermatozoa. The hyperactive and vacuolated features of the interrenal cells during spawning phase appeared to be concomitant with the final process of spermiation.

Open access

P.S. Malviya, N. Yadav and S. Ghosh

Abstract

The present paper is aimed to the exploration of acousto-optic (AO) modulational amplification in ion implanted semiconductors. The AO modulational process has been treated as a four wave parametric mixing process and the effective third-order acousto-optic susceptibility characterizing the instability process has been deduced. By considering that the origin of modulational interaction lies in the third order AO susceptibility arising from the nonlinear induced current density and using the coupled mode theory, an analytical investigation of an intense laser beam in a strain dependent dielectric constant (SDDC) semiconductor crystal is presented. We found a significant change in threshold and gain characteristics with changes in charge imbalance parameter. The presence of colloidal grains (CGs) plays an effective role in changing the threshold intensity and effective gain constant.

Open access

M. Srinivas, S. Satish Kumar, Venkata Ramya Bola, Ranabir Pal, Radhika Gorantla, M. Jahnavi, B.V. Subramanyam, Luis Rafael Moscote-Salazar, R. Lakshman Kumar, Amrita Ghosh and Amit Agrawal

Abstract

Background: Due to lack of pre-hospital care, direct admission of traumatic brain injury (TBI) patients to dedicated neurosurgical department remains difficult in many parts of world. Objective: The present pilot study was conducted to understand the referral pattern of patients to the neurosurgery department and to develop an algorithm to stratify the spectrum of cases as per the severity of condition and possibility of direct neurosurgical care. Materials and Methods: Details of referral patterns, demographic and clinical profile, management and outcome of consecutive TBI cases admitted in the Department of Neurosurgery were collected with predesigned proforma. Results: Of total 55 cases, 40 (73%) were males; 26 (47%) between 36-55 years age; 26 (47%) referred directly to the center; 24 (44%) self-referred; 34 (62%) referred from Emergency department; mostly (32, 58%) admitted after 12PM; 22 (40%) admitted for 16-30 days. In the analysis of investigations, 37(67%) cases had CT, 15 (27%) had MRI, 4 (7%) had X-ray, 1 (2%) undergone all three investigations, while 8 (15%) didn’t have any; mostly (42, 76%) cases were referred for the management of TBI and 38 (69%) required operative interventions. Conclusion: Our findings strongly suggest that referral of TBI cases need improvement in this part of country where hindrances delay TBI cases to reach dedicated neurological intensive care leading to delay of committed care and optimization of strategy for reduction of case fatality.