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Trial registered on ANZCTR
Registration number
ACTRN12610000912088
Ethics application status
Approved
Date submitted
14/10/2010
Date registered
26/10/2010
Date last updated
8/10/2019
Date data sharing statement initially provided
8/10/2019
Type of registration
Prospectively registered
Titles & IDs
Public title
Comparison of respiratory mechanics according to tidal volume obtained from predicted, current estimated and no body weight prediction method in patients under pressure controlled mechanical ventilation.
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Scientific title
Do differences of tidal volume, calculated from predicted, current estimated and no body weight prediction method, change the respiratory mechanics of patients under pressure controlled mechanical ventilation?
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Secondary ID [1]
252871
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Nil.
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Respiratory failure.
258391
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Inappropriate tidal volume during pulmonary mechanical ventilation
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Condition category
Condition code
Respiratory
258563
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0
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Other respiratory disorders / diseases
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
All the calculation will be done for every participant. Each phase correspond to one of the three interventions. Each phase will be performed once over a single day.
PHASE 1: calculation of predicted body weight through the formulas:50+0,91(height in centimeters)-152,4 for men and 45,5 +0,91 (height in centimeters)-152,4 for women. The result will be multiplied by 6 ml (this is the ARDS recommendation of protective ventilation) and the final result will be the tidal volume. We'll adjust the pressure limit that offers this tidal volume and keep the ventilation for 2 hours. After, the respiratory mechanics will be calculated according to the found tidal volume.
PHASE 2: calculation of the current estimated body weight through the formula: [0,98 X calf circumference(cm) + 1,16 X knee height(cm)]+[1,73 X arm circumference (cm)]+0,37 X subscapularis skinfold(mm)]-81,69 for men and [1,27 X calf ircumference(cm)]+[0,87 X knee height(cm)]+0,98 X arm circumference (cm)]+0,4 X subscapularis skinfold(cm)]-62 for women. The result will be multiplied by 6 ml and the final result will be the tidal volume. We'll adjust the pressure limit that offers this tidal volume and keep the ventilation for 2 hours. After, the respiratory mechanics will be calculated according to the found tidal volume.
PHASE 3: for no body weight prediction method we'll use the tidal volume observed at the mechanical ventilator initially. After, the respiratory mechanics will be calculated according to this tidal volume. Then the results of respiratory mechanics corresponding to each phase will be compared and defined which prediction body weight method is more appropriate, closer to normal values os respiratory mechanics.
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Intervention code [1]
257396
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Treatment: Other
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Comparator / control treatment
Uncontrolled
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Control group
Uncontrolled
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Outcomes
Primary outcome [1]
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Alteration of respiratory mechanics (pulmonary static compliance, pulmonary dynamic compliance and resistance).
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Assessment method [1]
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Timepoint [1]
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After the application of tidal volumes corresponding to each calculated weight.
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Secondary outcome [1]
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Which tidal volume can avoid acute lung injury.
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Assessment method [1]
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Timepoint [1]
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After 2 hours of mechanical ventilation.
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Eligibility
Key inclusion criteria
Adult patients, patients under mechanical ventilation, pressure controlled mode, respiratory failure diagnosed, hemodynamically stable patients, sedated patients.
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Minimum age
18
Years
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Maximum age
70
Years
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
Other ventilatory mode, sepsis diagnosed, presence of respiratory drive.
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Study design
Purpose of the study
Educational / counselling / training
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Allocation to intervention
Non-randomised trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Single group
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
Safety/efficacy
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Statistical methods / analysis
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Recruitment
Recruitment status
Withdrawn
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Reason for early stopping/withdrawal
Participant recruitment difficulties
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Date of first participant enrolment
Anticipated
1/12/2010
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Actual
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
20
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Accrual to date
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Final
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Recruitment outside Australia
Country [1]
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Brazil
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State/province [1]
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Minas Gerais
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Funding & Sponsors
Funding source category [1]
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University
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Name [1]
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Universidade Federal do Triangulo Mineiro
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Address [1]
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Avenida Getulio Guarita n.130
Bairro Abadia
Cep: 38025-440
Uberaba - Minas Gerais
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Country [1]
257833
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Brazil
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Primary sponsor type
Individual
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Name
Lilane Maria Alves Silva
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Address
Rua: Dona Rafa Cecilio, 259
Vila Maria Helena
Cep: 38020-080
Uberaba - Minas Gerais
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Country
Brazil
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Secondary sponsor category [1]
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Individual
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Name [1]
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Taciane Cristina Santana
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Address [1]
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Rua: Joao Pessoa n.280
Bairro: Abadia
Cep: 38025-400
Uberaba - Minas Gerais
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Country [1]
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Brazil
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Other collaborator category [1]
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Hospital
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Name [1]
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Hospital de Clinicas da Universidade Federal do Triangulo Mineiro
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Address [1]
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Avenida Getulio Guarita n.130
Bairro Abadia
Cep: 38025-440
Uberaba - Minas Gerais
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Country [1]
251557
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Brazil
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
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Comite de Etica em Pesquisa da Universidade Federal do Triangulo Mineiro
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Ethics committee address [1]
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Avenida Frei Paulino, 30 2 andar, Sala H Abadia
Cep: 38025-180 - Uberaba - Minas Gerais
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Ethics committee country [1]
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Brazil
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Date submitted for ethics approval [1]
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26/09/2008
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Approval date [1]
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08/12/2008
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Ethics approval number [1]
259862
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1226
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Summary
Brief summary
The Acute Respiratory Distress Syndrome Group (ARDS) determines that we must use 6 ml of kg of predicted body weight in order to offer appropriate measures of tidal volume to patients under mechanical ventilation. But improper methods to predict the body weight may cause damage to patients' lungs. Inadequate tidal volume will reflect in respiratory mechanics alteration.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Dr Lilane Maria Alves Silva
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Address
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Universidade Federal do Triangulo Mineiro
Av. Getulio Guarita, 130 Bairro Abadia Uberaba, Minas Gerais, Brazil
cep 38025-440
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Country
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Brazil
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Phone
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+553433185000
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Fax
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Email
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[email protected]
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Contact person for public queries
Name
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Dr Lilane Maria Alves Silva
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Address
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Universidade Federal do Triangulo Mineiro
Av. Getulio Guarita, 130 Bairro Abadia Uberaba, Minas Gerais, Brazil
cep 38025-440
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Country
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Brazil
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Phone
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+553433185000
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Name
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Dr Lilane Maria Alves Silva
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Address
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Universidade Federal do Triangulo Mineiro
Av. Getulio Guarita, 130 Bairro Abadia Uberaba, Minas Gerais, Brazil
cep 38025-440
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Country
5946
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Brazil
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Phone
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+553433185000
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Fax
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Email
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[email protected]
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
withdrawn
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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