Dr. Nithya Haridas completed her MBBS in 2006 from Government Medical College, Kottayam and DTCD in 2010 and MD Pulmonary medicine in 2011 from Government Medical College, Kozhikode, Kerala. She joined as Clinical Assistant Professor In the Department of Respiratory Medicine, Amrita Institute of Medical Sciences, Kochi, in 2012.

She is an astute clinician with good communication skills. Her key areas of interest include airway diseases, allergy & immunology, severe asthma, sleep medicine, pleural diseases, and pulmonary physiology. She has taken special training in adult allergy & immunotherapy and sleep medicine.

She has more than 10 publications to her credit. She is also a reviewer for numerous journals.

Qualification: MD, DTCD

Education and Professional Experience

  • 2012 – present - Department of Respiratory Medicine, Amrita Institute of Medical Sciences, Kochi
  • 2011- Passed MD Pulmonary Medicine from Government Medical College, Kozhikode
  • 2010 - Passed DTCD from Government Medical College, Kozhikode
  • 2000 – 2006 – MBBS - Government Medical College, Kottayam


Publication Type: Journal Article

Year of Publication Title


B. Salam, Mehta, A., Kunoor, A., Nithya Haridas, and James, P., “Awareness of STCI among medical practitioners in Ernakulam District,Kerala,India”, International Journal of Pulmonary and respiratory sciences, vol. 1, no. 1, pp. 18-22, 2020.[Abstract]

Background: More than 50% of total Tuberculosis management is being done in private sector in India. It varies from single doctor clinics to tertiary care centres and also include alternative systems of medicine. Government of India and Central TB Division came with Standards of TB Care in India in 2012 with the aim of standardising diagnosis and management of Tuberculosis. Here we are trying to assess the awareness regarding Standards of TB care in India (STCI). Objective: To assess the awareness regarding Standards of TB Care in India among clinicians in Kochi Municipal corporation. Materials and Methods: Cross sectional questionnaire based study using self-made semi structured questionnaire among medical practitioners in Kochi Municipal Corporation. Proportion of “compliant “practitioners working in public and private sector were calculated separately. The key outcome variables were the number (proportion) of practitioners following the STCI Standards for Treatment, diagnosis and notification. Questions 4 to 9 were based on standards for diagnosis, 10 to 13 on treatment and 14 to 17 on standards for notification. Statistical analysis were performed using IBM SPSS version 20.0 software. Categorical variables were presented using frequency and percentage. Numerical variables were expressed using mean and standard deviation. To find the statistical significance in knowledge scores between private and public level doctors, chi-square test was used. P value<0.05 was considered as statistically significant. Results: 82% of the practitioners knew that Tuberculosis should be suspected in patients with cough for lasting for more than 2 weeks.Regarding the STCI prescribed standards for treatment of Tuberculosis, only 31% of the study population were aware about the standard regimen for treating a new case of TB. Fifty six percent of the practitioners knew that the Tb cases should be notified. As per grading, 26 doctors were having good knowledge, 53 with average and 26 being poor in knowledge. Most of the findings are comparable with previous studies There is statistically significant difference in the knowledge among the private and public sector practitioners. (p value =0.01. There is a need for extensive measures for strengthening the awareness of STCI.

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T. Mohammed Shafi, Nithya Haridas, Belagundi, P., and Mehta, A. Anilkumar, “A piece of broken intubation tube stylet as endobronchial foreign body”, Egyptian Journal of Bronchology, vol. 13, pp. 774 - 777, 2019.[Abstract]

Endotracheal tube stylets are still being used in many medical centres for difficult intubations. In rare cases, it may break inside the trachea during endotracheal intubation and may sometimes move unnoticed deep into the tracheobronchial tree. In this case report, the authors describe a rare complication after endotracheal tube (ETT) stylet intubation in a patient in whom a broken piece of metal guide remained in her tracheobronchial tree. A 69-year-old lady was admitted to our hospital for management of shortness of breath and cough with expectoration. The patient was a known case of chronic obstructive pulmonary disease, cor pulmonale and coronary artery disease. The authors report a case of an unrecognized broken piece of stylet in her tracheobronchial tree and left main bronchus, which was later detected by computed tomography scan and extracted. Despite precise evaluation before use, signs of breakage in the stylet may be missed, and, consequently, it may break inside the trachea and result in serious complications. It is strongly recommended that the intensivists pay attention to the sounds and movements of the instruments.

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A. Valappil, Mehta, A., Kunoor, A., and Nithya Haridas, “Spectrum of diffuse parenchymal lung diseases: An Experience from A Tertiary Care Referral Centre From South India”, The Egyptian Journal of Chest Diseases and Tuberculosis, vol. 67, no. 3, pp. 276-280, 2018.[Abstract]

Background Diffuse parenchymal lung diseases (DPLDs) include the idiopathic interstitial pneumonias, hypersensitivity pneumonitis, connective tissue disease-related interstital lung disease (ILD), lymphangioleiomyomatosis, sarcoidosis, etc. The prevalence and outcome of DPLD is not studied well across India. The current study was aimed at studying clinical radiological spectrum of DPLD in India. Aim The primary objective was to study the clinical radiological spectrum of DPLD, and the secondary objective was to identify the occurrence of idiopathic pulmonary fibrosis (IPF) and risk factors combined with IPF in a study population. Materials and methods All patients diagnosed with DPLDs in department of pulmonary medicine during the study period were included. SPSS 20 version was used for doing statistical analysis. P value of less than 0.05 was considered statistically significant. Results Mean age of the study cohort was 55±15.45 years. There were 83 (63.4%) female patients, and 11.6% of the patients gave history of prior antituberculosis medicine. Most common symptoms were gradually progressing dyspnoea (94.5%) followed by dry cough (78.29%). The commonest finding on chest radiograph in our series was reticulonodular pattern (80.2%). The commonest pattern on high-resolution computed tomography was fibrosis in interstitum (49.9%). The commonest cause of DPLD in study was connective tissue disorder (34.9%) followed by IPF (23.25%) and sarcoidosis (17.05%). Of all patients, 47 showed improvement on the six-minute walk test. Smoking was one of the major risk factor associated with IPF, and 66.7% of patients with IPF were smokers (P<0.001). The other risk factor associated with IPF was gastro esophageal reflux disease (GERD) (P=0.003). Conclusions Connective tissue disease (CTD)-related ILD was the commonest DPLD followed by IPF and non specific interstitial pneumonitis (NSIP) in the present study. IPF was present in 23% of the cases. Smoking and GERD were the commonest risk factors associated with IPF.

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Nithya Haridas, Mehta, A., Mohammed, T., and Nair, I., “Young man with nonresolving pneumonia”, Egyptian Journal of Bronchology, vol. 12, no. 3, pp. 367-369, 2018.[Abstract]

Hamartoma is a benign lung tumor. Parenchymal hamartomas are usually asymptomatic, but endobronchial hamartoma can present with features of obstruction. Here, we present a case of a young man who presented with nonresolving pneumonia. His bronchoscopy showed an endobronchial hamartoma.

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A. Nair, Nithya Haridas, Ahmed, S., and Borkar, P. V., “EBUS-TBNA-initial experience from a tertiary care center in southern India”, Journal of Clinical and Diagnostic Research, vol. 12, pp. OC29-OC32, 2018.[Abstract]

Introduction: Conventional trans bronchial needle aspiration is associated with a low diagnostic yield in mediastinal adenopathy. Ultra sound guidance improves the diagnostic yield in these cases. Though linear probe EBUS was introduced in southern India as early as 2008, there is a dearth of literature in South Indian population on the utility of this diagnostic modality. Aim: To analyse the diagnostic yield, sensitivity, specificity of real time endo bronchial ultrasound guided trans bronchial needle aspiration (EBUS-TBNA). Materials and Methods: A prospective observational study was carried out from April 2014 to October 2016. Patients referred for evaluation of medisatinal lymphadenopathy were evaluated with computed tomography of the thorax and EBUS-TBNA was done under conscious sedation. Rapid on site examination was done. A sample that was positive for malignant cells/ granuloma was considered to be diagnostic. A non-diagnostic procedure was followed up with definitive surgery or a six month clinicoradialogical follow up. Results: The study included 78 patients (48 males) with mean age 55.9 years. EBUS-TBNA detected 237 enlarged mediastinal nodes with average diameter of 20.48±8.55 mm. A total of 125 lesions were sampled of which sub carinal lymph node was the most common station (44.8%). Average of 1.6 lymph nodes was sampled per patient with 2.92 passes per lymph node. The procedure had a diagnostic yield of 91.02%, with sensitivity of 89.55% (79.65-95.70%), specificity of 100% (71.51-100%), Negative likelihood ratio of 0.10 (0.05-0.21), positive predictive value of 100% (94.04-100%), negative predictive value of 61.11% (32.75-82.70%). Majority of the patients were diagnosed with non small cell cancer with tuberculosis constituting the major diagnosis among the patients with clinical suspicion of a non malignant aetiology. There were no complications associated with the procedure. Conclusion: EBUS guided TBNA is a safe procedure with a good diagnostic yield. It is a useful procedure in lymph nodes which remain inaccessible by conventional TBNA or mediatinoscopy based on size or location. © 2018, Journal of Clinical and Diagnostic Research. All rights reserved.

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V. Krishna S, A, M., and Nithya Haridas, “Clinical Spectrum of Lung Cancer and its Association with Smoking Habit”, Amrita Journal of Medicine., vol. 13, no. 2, pp. 26-29, 2017.


A. Nair, Nithya Haridas, Ahmed, S., and Eapen, M., “Radial Probe Endobronchial Ultrasound for Peripheral Pulmonary Lesions: Initial Experience in an Indian Tertiary Healthcare Centre”, Journal of Cardio-Thoracic Medicine, vol. 5, pp. 213-217, 2017.[Abstract]

Introduction : Diagnosis of peripheral pulmonary nodules is confusing; therefore, an accurate and safe lung biopsy can prevent unnecessary invasive diagnostic procedures. This study soughtto study the diagnostic yield, sensitivity, specificity, and negative and positive predictive values (NPV and PPV) of radial probe endobronchial ultrasound (EBUS)-guided biopsy for peripheral pulmonary lesions. Materials and Methods: Patients referred to the Division of Pulmonary Medicine for evaluation of peripheral pulmonary lesions were subjected to radial probe EBUS-guided transbronchial lung biopsy under conscious sedation after reviewing positron emission tomography scan/computed tomography results. The obtained specimens were considered diagnostic when the cytological, histopathological, or microbiological diagnosis was consistent with the clinical presentations. Results: Totally, 14 procedures were performed on 13 patients with mean lesion size of 30.42 mm. Mean distance between the lesion and pleura was 1.17±0.68 cm, and the diagnostic yield of this technique was 78.57%. Furthermore, the sensitivity, specificity, and NPV were 70% (range: 34.75 to 93.33), 100% (range: 39.76 to 100), and 57.14% (range: 18.41 to 90.10), respectively. This procedure was not associated with any major complications. Conclusion: Radial probe EBUS with satisfactory diagnostic yield and low complication rate is a promising tool for early diagnosis of lung cancer

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Nithya Haridas, “Disseminated Tuberculosis with autoimmune hemolytic anemia”, Pulmon, vol. 18, no. 1, pp. 38-40, 2016.


Nithya Haridas, “Correlation of Six Minute Walk Distance with Clinical & Spirometric Parameters in COPD”, Amrita Journal of Medicine, vol. 12, no. 2, pp. 32-36, 2016.[Abstract]

Introduction: Chronic obstructive pulmonary disease ( COPD) is a progressive condition associated with morbidity and mortality. Spirometry, the diagnostic test for of COPD is not widely available. Many a time it is effort dependent and hence, a poor indicator of the functional status. Six Minute walk test, an indicator of functional status would be a better prognostic marker for follow up of patients. Aim of study: To assess correlation of 6 minute walk distance with post bronchodilator FEV1 in patient with COPD Methodology. Patients diagnosed with COPD were subjected to spirometry and 6 Minute walk tests after collecting their baseline demographic and disease characteristics, including MMRC dyspnea scale, BMI , duration of illness, number of exacerbations in past year, medication intake, home oxygen use. Correlation between 6MWD and clinical and spirometric variables estimated using SPSS software version 20. Results: Study included 51 patients. FEV1( mean-53.45%) ( r - 0.293) FVC ( mean- 65.25%)( r - 0.307 ) showed no correlation with 6 MWD. MMRC scale of dyspnea ( r - 0. 497 ) Borg dyspnea scale (r - 0.505) showed positive correlation with 6 MWD Age( 67.76+/- 7.99yrs) (r - 0.141 ) exacerbation frequency ( mean- 1.33) (r - 0.149 ) duration of symptoms (6.94+ /- 9.22 yrs) (r - 0.283 ) showed no correlation. Conclusion: Six Minute walk distance failed to show positive correlation with spirometric parameter and clinical parameters. 6MWD cannot replace spirometry in patients with COPD. It may be used for functional evaluation of patient who cannot perform spirometry.

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Nithya Haridas, Suraj, K. P., Rajagopal, T. P., James, P. T., and Chetambath, R., “Medical thoracoscopy vs closed pleural biopsy in pleural effusions: a randomized controlled study”, Journal of clinical and diagnostic research: JCDR, vol. 8, p. MC01, 2014.[Abstract]

Background: Pleural effusion is a common diagnostic dilemma for the pulmonologist. A histological diagnosis would many a time steer the way to an accurate diagnosis of the aetiologies of pleural effusions. This study has compared two methods for obtaining histological specimens in cases of undiagnosed pleural effusions. Aim: To compare the efficacy of closed pleural biopsy with Abrahm’s needle and medical thoracoscopic biopsy in the diagnosis of undiagnosed exudative pleural effusions at a tertiary care setting. Study Design: Randomized controlled study. Study Period: November 2008–October 2010. Methodology: All patients who were admitted with pleural effusions underwent a clinical workup for pleural effusions. Light’s criterion was used to differentiate between exudative and transudative pleural effusions. Those patients with exudative pleural effusions, who did not have a specific diagnosis, were included in the study. Fifty eight patients were included in the study and they were randomized into 2 Groups of 29 patients each. One group was subjected to medical thoracoscopic pleural biopsy and the other to closed pleural biopsy with Abrahm’s needle. Demographic, clinical and biochemical characteristics, diagnostic yields and the complications among the two groups were compared. Result: Medical thoracoscopy has a diagnostic yield of 86.2% with complication rate of 10.3% compared to 62.1% and 17.2% respectively in closed pleural biopsy group. Conclusion: Medical thoracoscopic pleural biopsy had a better diagnostic yield with a lower complication rate as compared to closed pleural biopsy with Abrahm’s needle. More »»


  • Tuberculosis Research and Treatment
  • Journal of Thoracic Disease
  • Journal of Clinical and Diagnostic Research

Professional Interest

  • Airway diseases
  • Allergy & immunology
  • Sleep medicine
  • Pleural diseases
  • Pulmonary physiology

Professional Memberships

  • Indian Medical Association
  • Indian Chest Society
  • European Respiratory Society
  • Academy of Pulmonary & Critical Care Medicine
  • Cochin Thoracic Society

Workshops and Seminars Organized

  • Scientific Committee Member of Amrita PG update January 2020
  • Reception Committee – local coordinator- NAPCON 2019
  • Local Convener for Rigid Bronchoscopy workshop of NAPCON 2019
  • Registration Committee Member COPD Rehabilitation workshop & PG update – 2019
  • Registration Committee Member of  Basic Bronchoscopy Workshop 2015
  • Registration Committee Member  Pulmocon 2015


  • Received second best paper  award APCCM annual conference RESPICON 2010 
  • Received second best paper  award APCCM annual conference RESPICON 2009 
  • Received second best paper  award in  state TB conference -TBCON – 2008

Chairperson for the following Conferences:

  • NAPCON 2019
  • PULMOCON 2019