Skip Ribbon Commands
Skip to main content

Dr Cheng Zai Ru

Dr Cheng Zai Ru

MBBS (Spore), MMed (Paeds), MRCPCH (UK), GDMH (NUS), GDFM (NUS)

Staff Physician

Clinical Appointments

  • Staff Physician Respiratory Medicine Service KK Women's and Children's HospitalKK Women's and Children's Hospital
  • Staff Physician SingHealth Duke-NUS Sleep Centre


Dr Cheng Zai Ru received her medical degree from National University of Singapore (NUS) in 2008 and subsequently obtained her Master of Medicine in Paediatric Medicine (NUS) and attained Membership to the Royal College of Paediatrics and Child Health (UK) in 2013. She further obtained the Graduate Diploma in Mental Health (NUS) in 2020 and Graduate Diploma in Family Medicine (NUS) in 2022.

She has been providing outpatient care to patients seen within the Respiratory Medicine Service since 2014, treating patients with general respiratory conditions, asthma and sleep conditions. Between 2015-2019, she collaborated with local schools and organizations on excursions for KKH patients with chronic respiratory illnesses to help them realise the fun in exercise through the Breathe Easy And Restful Sleep (B.E.A.R.S) Club.

Since 2020, she has been the anchor clinician for video consultation services provided by the Respiratory Medicine Service.

She is currently an Adjunct Lecturer with the Lee Kong Chian School of Medicine and a Clinical Tutor with NUS Yong Loo Lin School of Medicine.

Her clinical research interests are in paediatric respiratory and sleep related disorders.


  • Grad Dip Family Medicine (NUS) 2022
  • Grad Dip Mental Health (NUS) 2020
  • MMed (Paediatrics) (Singapore) 2013
  • MRCPCH (UK) 2013
  • MBBS (NUS) 2008

Professional Appointments and Committee Memberships

  • Staff Physician, Respiratory Medicine Service, KKH 2021-present
  • Adjunct Lecturer, Lee Kong Chian School of Medicine, 2022-present
  • Clinical Tutor, Yong Loo Lin School of Medicine, NUS 2021-present
  • Member, Transforming Model of Care Steering Committee (Acute Paediatrics), KKH 2022- present
  • Senior Staff Registrar, Respiratory Medicine Service, KKH 2017-2021
  • Staff Registrar, Respiratory Medicine Service, KKH 2014-2017
  • Medical officer, Paediatrics, Specialist Trainee (Basic), Ministry of Health, 2009-2013


  • Service from the Heart Award, KKH 2018, 2021
  • 10 years Long Service Award, KKH 2020
  • Finalist, Young Investigator Award, International Congress of Paediatric Pulmonology, Tokyo, 2019
  • 1st runner up (poster), Annual Scientific Meeting, KKH 2019
  • Nestle Nutrition Institute Award (Silver Medal) MMed (Paeds) Exam 2014

Research Interests

  • Paediatric Respiratory conditions
  • Paediatric Sleep conditions

Publications and Research Trials

  • Assessing the accuracy of AI enabled acoustic analytic technology on breath sounds in children. Cheng ZR, Zhang HY, Thomas B, Tan YH, Teoh OH, Pugalenthi A. J. Med Eng Technol. 2022 Jan;46(1):78-84.
  • Keeping pace with adolescent asthma- A practical approach to optimizing care. Cheng ZR, Tan YH, Teoh OH, Lee JH. Pulm Ther. 2022 Mar;8(1):123-137.
  • Approach to chronic cough in children. Cheng ZR, Chua YX, How CH, Tan YH. Singapore Med J. 2021 Nov;62(10):513-519.
  • Persistent opacity on X-ray: take a closer look at the ribs. Cheng ZR, Thomas B, Pugalenthi A, Tan YH, Teoh OH. Br J Hosp Med. 2020 Jul;81(7).
  • Integrated approach to e-learning enhanced both subjective and objective knowledge of aEEG in a neonatal intensive care unit. Poon WB, Tagamolila V, Toh YP, Cheng ZR. Singapore Med J. 2015 Mar;56(3):150-156.

Research Trials

  • Prevalence and risk factors for hypertension among children with sleep-disordered breathing: a prospective cohort study (Co-investigator; Paediatrics, SingHealth-Duke NUS, Tan Cheng Lim Research Fund) 2021-present
  • Updated on 2022-08-24T16:00:00Z