Comparison between energy expenditure derived from indirect calorimetry and calculation from Weir formula using end tidal capnography

Comparison of energy expenditure measurement in critically ill patient between Indirect Calorimetry and Weir's equation with VCO2 from time-based capnography

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20230404002

Enrollment

Registered

2023-04-04

Start date

2023-02-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Energy needs Indirect calorimetry Energy expenditure ICU setting Ventilator

Interventions

Energy expenditure derived from indirect calorimetry Goal standard, control ,Calculated energy expenditure from Weir formula using VCO2 calculated from ventilator, arterial blood gas and time-based ca

Diagnostic,Diagnostic

Indirect calorimetry ,Calculated from time-based capnography

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Thai's patient age equally to or more than 18 years old. Admit to intensive or intermediate care in Ramathibodi hospital Intubated Consent to the trials.

Exclusion criteria

Exclusion criteria: During adjustment of ventilator needs On high ventilator setting (PEEP >12, FiO2 >0.6) Needs nebulization more frequent than 30 minutes Needs suction more frequent than 30 minutes Respiratory rate more than 20 times/minutes Pain with Numeric pain rating scale or visual analogue scale more than 6 Wish not to participate End of life care

Design outcomes

Primary

Measure	Time frame
Comparison between the energy expenditure from indirect calorimetry and modified Weir's equation using time-based capnography 30 minutes of measurement kcal/day	—

Secondary

Measure	Time frame
Comparison between the energy expenditure from indirect calorimetry and energy expenditure from weight-based equation 30 minutes of measurement kcal/day ,Comparison between the energy expenditure from indirect calorimetry and energy expenditure from PENN stat equation 30 minutes of measurement kcal/day,Comparison between the energy expenditure from indirect calorimetry and energy expenditure from Swinamer equation 30 minutes of measurement kcal/day	—

Measure

Time frame

Comparison between the energy expenditure from indirect calorimetry and energy expenditure from weight-based equation 30 minutes of measurement kcal/day ,Comparison between the energy expenditure from indirect calorimetry and energy expenditure from PENN stat equation 30 minutes of measurement kcal/day,Comparison between the energy expenditure from indirect calorimetry and energy expenditure from Swinamer equation 30 minutes of measurement kcal/day

—

Countries

Thailand

Contacts

Public ContactPhahol Sarojvisut

Faculty of Medicine, Ramathibodi Hospital, Mahidol University

wind292002pahol@gmail.com0866123737

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026