Assessment of Sleep Quality Using Pittsburgh Sleep Quality Index Questionnaire in Undergraduate and Post Graduate Medical College Students in Bhopal

In an attempt to deal with their workload and stressful atmosphere, medical students often cut down on their sleep. Sleep not only has an impact on cognitive functions, but it is also essential for stress recovery and tiredness removal. The study was done to determine the quality of sleep using the Pittsburgh Sleep Quality Index (PSQI) among medical students in Bhopal. This cross-sectional descriptive questionnaire study of 408 medical (MBBS or MD) students from AIIMS and GMC, Bhopal, was undertaken from June 2020 to September 2020. They were presented with online self-administered questionnaire (Google forms). The Google forms were organized into four sections: student's information sheet, consent form, demographic data (gender, age, and year of education separately for PG and UG) and PSQI questionnaires. The mean age of all undergraduate and post graduate students (n=408) volunteered to participated in this study was 21.76±3.01 years of which 170 students (41.7%) had age less than: ≤20 years, 23(56.9%) between 21-30 years and 06(1.5%) of the participants had age between 31-40 years. The age (years) ranged from 18-38 years. The number of male and female students were 251(61.5%) and 157(38.5%) respectively. Out of the total number of participants, 335(82.1%) were MBBS students and 73(17.9%) were MD/MS students. N-parametric tests (Kruskal Wallis Test) were used to make group comparisons. The mean global score for MBBS and Post graduate students were 6.11±3.06 and 6.00±3.64 respectively which reflect poor quality of sleep. Variables of sleep latency, sleep duration and daytime dysfunction were variables were significantly associated (p<0.05). There should be more academic counseling facilities at medical schools that emphasize the need of getting enough sleep.

Changes in Peripheral Brachial Blood Pressure from Supine to Lateral Decubitus Position in Hypertensive and Normotensive Subjects

Arterial blood pressure is crucial for supplying the nutritional demands of the all body tissues and is also under tight control for the same. The day to day stress impacts the blood pressure (BP), which is effectively corrected by the baroreceptors mechanism. The effect of lateral decubitus position on the blood pressure with respect to supine position needs to be evaluated as it impacts the haemodynamics. The peripheral brachial blood pressure changes are studied among the normotensives and hypertensives with its significance from change in supine to lateral decubitus position. Sixty (60) normotensives and 60 hypertensive subjects were evaluated for arterial blood pressure measurement using mercury sphygmomanometer by gold standard auscultatory method in the supine, right and left lateral decubitus position. The same observer measured the blood pressure at the similar point of time for all the participants. The Supine and lateral decubitus Systolic and diastolic blood pressure (Mean±SD) parameters were recorded and compared using the paired 't' test (Supine Normotensives SBP 112.5±16.9, DBP 70.1±17.7 mm of Hg; Hypertensives Stage I SBP 130.2±14.5, DBP 85.2±2.8 mm of Hg; Hypertensive Stage II SBP 152.6 ±17.5, DBP 98.4±9.5mm of Hg). The mean and percentage change in systolic and diastolic BP for Normotensives from supine to right lateral position- SBP 11.6 mm of Hg (10.3%), DBP 8.8 mm of Hg (12.5%) and supine to left lateral position SBP 12.5mm of Hg (11.1%), DBP 9.9 mm of Hg (14.1%) p<0.05, for Hypertensives Stage I supine to right lateral position SBP 13.8 mm of Hg (10.5%), DBP 14.8 mm of Hg (17.37%) and supine to left lateral position SBP 13.5 mm of Hg (10.3%), DBP 12.3 mm of Hg (14.13%) p<0.05 and for Hypertensive Stage II from supine to right lateral position SBP 22.6 mm of Hg (14.8%), DBP 16.6 mm of Hg (16.8%), form supine to left lateral position SBP 12.3mm of Hg (8%), DBP 14.7mm of Hg (14.9%) p<0.01) changed significantly among the all the groups with respect to change from supine to lateral decubitus position. The fall in diastolic BP was of greater magnitude than the systolic BP. The right lateral decubitus position was dominant among the hypertensives for producing the change as compared to left lateral decubitus position. However among the normotensives it was left lateral decubitus which produced greater reduction in blood pressure. The lateral decubitus position definitively reduces the blood pressure as compared to supine position and the changes produced can't be simply ascribed to the hydrostatic effect of gravity on blood column. Sleeping on lateral side could thus be advantageous in reducing the arterial blood pressure.

Slow Frequency Anuloma Viloma Pranayama Modulates Cardiac and Neural Oscillations in Yoga Practitioners

Anuloma viloma pranayama (AVP) also known as Alternate nostril breathing (ANB) is the most commonly used form of pranayama, the ancient breath control practice. It is known to modulate cardiovascular control and brain activity. This study analysed the simultaneous recording of Heart rate variability (HRV) and brain activity during and after AVP at a very slow frequency. We carried out an observational cohort study from October 2021 to December 2021 with purposive sample of 30 (Thirty) healthy volunteers involved in regular kriya yoga practice for the last 15 years were inducted into this study AVP involves slow and deep inhalation through one nostril at a time. The ECG for HRV analysis and spectrum of EEG waves were recorded throughout the pre-AVP, during-AVP and post-AVP (each of five-minute duration). The parameters were compared and analysed by repeated measures of analysis of variance with post-hoc analysis using Bonferroni and Holm's multiple comparisons. In time Domain parameters, SDNN and RMSSD were significantly higher during AVP as compared to the pre-AVP and post AVP. In frequency domain parameters total power, LF power, HF power, showed a significant increase during AVP, LF/HF ratio increased during AVP and remained higher post-AVP also. Similarly, Alpha, Beta and Gamma wave power increased significantly during AVP as compared to pre-AVP and post-AVP. The lungs-heart-brain act as coupled oscillators, the analysed data show an increased arousal, attentive and focused state with a negligible change in the heart rate. An overall increased variability in HRV was recorded.

Use of MTT Assay for Proliferation of U937 Cell Line and its Inter-rater Reliability - Best Taken with a Grain of Salt

Background Biomedical research frequently employs immortal human cell lines to study various physiological and pathological topics of interest. An important problem that is often ignored is the question of reliability of observations made while using a particular assay on cell lines, especially MTT Assay. Recent studies have questioned its reliability by highlighting the diverse intracellular environmental factors that affect accuracy of MTT assay results. Objective To assess the inter-rater reliability of MTT assay while observing the differential effect of addition of fetal bovine serum to the culture medium on proliferation of U937 cell line using Intraclass correlation coefficient. Method U937 cell suspension prepared by the tutor to maintain uniformity of immortalized cell line was used. Four trainee investigators who participated in the study underwent rigorous training in pipetting and plating methods for four consecutive days prior to start of the experiment. Each trainee investigator followed the same protocol and all procedures were conducted simultaneously. At the end of the experiment, inter observer reliability was calculated. Result Interrater reliability calculated by using intra class correlation coefficient with two way mixed effect model was found to be poor (p = 0.173). For growth with 10% fetal bovine serum, inter-rater reliability was 0.258 for each item and 0.58 for the average of the triplicates, whereas for 0% fetal bovine serum it was 0.374 for each item and 0.70 for average of the values (p=0.104). Conclusion Though MTT assay is considered the gold standard test for assessment of cell proliferation and viability, the inter-rater reliability of this assay might be poor and needs further investigation.

Antimicrobial activity of essential oil and various extracts of fruits of greater cardamom

Greater cardamom (Amomum subulatum Roxb. Zingiberaceae) commonly known as “Bari ilaichi” is a well known plant used in Ayurvedic and Unani medicine. It has been used for the treatment of various diseases and disorders like gastric ulcer. Therefore antimicrobial activity of petroleum ether, methanol and aqueous extracts from leaves and roots, essential oil and isolated vasicine from A. vasica were tested against various microorganisms. Antimicrobial activity was done by disc diffusion method. The zone of inhibition observed was compared with that of standard drugs, ciprofloxacin and fluconazole. Minimum inhibitory concentration was determined against microorganisms used in the study. The results of this study reveal that methanol extract of fruits of A. subulatum shows remarkable antimicrobial activity against Escherichia coli whereas in case of other microorganisms used it was found inferior to the standard drug used. Methanol extract of rind showed good antimicrobial activity against Staphylococcus aureus. It was found that the essential oil isolated was effective against majority of microorganisms used viz. Bacillus pumilus, Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Saccharomyces cerevisiae.