Diaphragmatic Ultrasound as a Guide Tool During Weaning From Mechanical Ventilation

NCT ID: NCT03608332

Last Updated: 2019-10-01

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

160 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-04-30

Study Completion Date

2019-09-29

Brief Summary

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To assess value of adding ultrasound derived variables to the usual parameters on success rate of weaning from mechanical ventilation in critically ill patients and to validate sensitivity and specificity of ultrasound derived variables (thickening fraction /diaphragmatic excursion)

Detailed Description

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Difficult weaning from mechanical ventilation (MV) is a common problem in critically ill patients. Many parameters have been developed to aid weaning from MV such as P/F ratio (PO2/FiO2) and rapid shallow breathing index (respiratory rate/tidal volume), however, sensitivity and specificity for most variables are still variable in literature.

Multiple studies have found that patients tolerantof SBTs were found to have successful discontinuationsat least 77% of the time.

Causes of weaning failure include: airway and lung dysfunction, brain dysfunction, cardiac dysfunction, diaphragm dysfunction, and endocrine dysfunction .

Diaphragmatic dysfunction is a common cause of weaning failure , however most of the traditional methods used for evaluation of diaphragmatic function (fluoroscopy, trans-diaphragmatic pressure measurement) are invasive and not available.

Ultrasound assessment of diaphragmatic function has been developed recently providing an easy and safe method for evaluation of diaphragmatic excursion and thickening.

It was found that weaning failure (Re-intubation within 48 hours) was associated with diaphragmatic excursion \<1 cm and thickening fraction \<28% several studies reported the value of diaphragmatic ultrasound to predict weaning failure ,however no one of them used diaphragmatic ultrasound to guide weaning.

previous studies showed that failure rate of weaning from mechanical ventilation was 27% ,however failure rate in our department was 43% adding ultrasound derived values aims for improving success rate of weaning from mechanical ventilation.

Conditions

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Diaphragmatic Ultrasound in Weaning

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

DOUBLE

Investigators Outcome Assessors

Study Groups

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Group S

weaning readiness will be evaluated with the standard criteria :- A) Clinical assessment:-

* Resolution of acute phase of disease for which patient was intubated
* Adequate cough
* Absence of excessive tracheobronchial secretions

B) Objective criteria:-

* Adequate oxygenation:PaO2\>60mmHg with PEEP\<8,SaO2\>90%,FIO2 \<0.5,PaO2/FIO2\>200
* Respiratory rate \<30
* PH and PaCO2 appropriate for patients' baseline respiratory status
* Hemodynamically stable :minimal or no vasopressor/inotropes,no evidence of myocardial ischemia
* HR\<140 beats/minute
* Patient is arousable or Glasgow coma scale (GCS)\>13

Group Type NO_INTERVENTION

No interventions assigned to this group

Group SD

weaning readiness will be evaluated with the following criteria:- A) Clinical assessment:-

* Resolution of acute phase of disease for which patient was intubated
* Adequate cough
* Absence of excessive tracheobronchial secretions

B) Objective criteria:-

* Adequate oxygenation:PaO2\>60mmHg with PEEP\<8,SaO2\>90%,FIO2 \<0.5,PaO2/FIO2\>200
* Respiratory rate \<30
* PH and PaCO2 appropriate for patients' baseline respiratory status
* Hemodynamically stable :minimal or no vasopressor/inotropes,no evidence of myocardial ischemia
* HR\<140 beats/minute
* Patient is arousable or Glasgow coma scale (GCS)\>13

C) Ultrasound criteria:-

• Diaphragmatic excursion \>11 mm

Group Type EXPERIMENTAL

diaphragmatic ultrasound

Intervention Type DEVICE

Diaphragmatic excursion; Diaphragmatic movement will be measured with a 3.5-MHz US probe (Mindray machine, DC-N6).

Interventions

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diaphragmatic ultrasound

Diaphragmatic excursion; Diaphragmatic movement will be measured with a 3.5-MHz US probe (Mindray machine, DC-N6).

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Critically ill patients intubated for more than 48 hours who are ready for weaning

Exclusion Criteria

* • Age \< 18 years

* surgical dressings over the right lower rib cage which would preclude ultrasound examination
* patients with chest trauma, thoracotomy, diaphragmatic paralysis, diaphragmatic injury and diaphragmatic surgery
* patients with neuromuscular diseases ( myasthenia gravis ,Muscular dystrophies ,Multiple sclerosis and Amyotrophic lateral sclerosis)
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Cairo University

OTHER

Sponsor Role lead

Responsible Party

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Mina Adolf Helmy

Doctor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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ahmed mohamed moukhtar, MD

Role: PRINCIPAL_INVESTIGATOR

professor of anesthesiology cairo university

waleed ibrahim Hamimmy, MD

Role: PRINCIPAL_INVESTIGATOR

professor of anesthesiology cairo university

akram shahat Eladawy, MD

Role: PRINCIPAL_INVESTIGATOR

assistant professor of anesthesiology cairo university

ahmed muhamed lotfy, MD

Role: PRINCIPAL_INVESTIGATOR

lecturer of anesthesiology cairo university

mina adolf helmy, MSc

Role: PRINCIPAL_INVESTIGATOR

assistant lecturer of anesthesiology cairo university

Locations

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Cairo University-Manial

Cairo, , Egypt

Site Status

Countries

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Egypt

References

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El-Khatib MF, Bou-Khalil P. Clinical review: liberation from mechanical ventilation. Crit Care. 2008;12(4):221. doi: 10.1186/cc6959. Epub 2008 Aug 6.

Reference Type BACKGROUND
PMID: 18710593 (View on PubMed)

MacIntyre NR, Cook DJ, Ely EW Jr, Epstein SK, Fink JB, Heffner JE, Hess D, Hubmayer RD, Scheinhorn DJ; American College of Chest Physicians; American Association for Respiratory Care; American College of Critical Care Medicine. Evidence-based guidelines for weaning and discontinuing ventilatory support: a collective task force facilitated by the American College of Chest Physicians; the American Association for Respiratory Care; and the American College of Critical Care Medicine. Chest. 2001 Dec;120(6 Suppl):375S-95S. doi: 10.1378/chest.120.6_suppl.375s. No abstract available.

Reference Type BACKGROUND
PMID: 11742959 (View on PubMed)

Fagon JY, Chastre J, Hance AJ, Montravers P, Novara A, Gibert C. Nosocomial pneumonia in ventilated patients: a cohort study evaluating attributable mortality and hospital stay. Am J Med. 1993 Mar;94(3):281-8. doi: 10.1016/0002-9343(93)90060-3.

Reference Type BACKGROUND
PMID: 8452152 (View on PubMed)

Esteban A, Frutos F, Tobin MJ, Alia I, Solsona JF, Valverdu I, Fernandez R, de la Cal MA, Benito S, Tomas R, et al. A comparison of four methods of weaning patients from mechanical ventilation. Spanish Lung Failure Collaborative Group. N Engl J Med. 1995 Feb 9;332(6):345-50. doi: 10.1056/NEJM199502093320601.

Reference Type BACKGROUND
PMID: 7823995 (View on PubMed)

Heunks LM, van der Hoeven JG. Clinical review: the ABC of weaning failure--a structured approach. Crit Care. 2010;14(6):245. doi: 10.1186/cc9296. Epub 2010 Dec 8.

Reference Type BACKGROUND
PMID: 21143773 (View on PubMed)

Matamis D, Soilemezi E, Tsagourias M, Akoumianaki E, Dimassi S, Boroli F, Richard JC, Brochard L. Sonographic evaluation of the diaphragm in critically ill patients. Technique and clinical applications. Intensive Care Med. 2013 May;39(5):801-10. doi: 10.1007/s00134-013-2823-1. Epub 2013 Jan 24.

Reference Type BACKGROUND
PMID: 23344830 (View on PubMed)

Kim WY, Suh HJ, Hong SB, Koh Y, Lim CM. Diaphragm dysfunction assessed by ultrasonography: influence on weaning from mechanical ventilation. Crit Care Med. 2011 Dec;39(12):2627-30. doi: 10.1097/CCM.0b013e3182266408.

Reference Type BACKGROUND
PMID: 21705883 (View on PubMed)

Ferrari G, De Filippi G, Elia F, Panero F, Volpicelli G, Apra F. Diaphragm ultrasound as a new index of discontinuation from mechanical ventilation. Crit Ultrasound J. 2014 Jun 7;6(1):8. doi: 10.1186/2036-7902-6-8. eCollection 2014.

Reference Type BACKGROUND
PMID: 24949192 (View on PubMed)

DiNino E, Gartman EJ, Sethi JM, McCool FD. Diaphragm ultrasound as a predictor of successful extubation from mechanical ventilation. Thorax. 2014 May;69(5):423-7. doi: 10.1136/thoraxjnl-2013-204111. Epub 2013 Dec 23.

Reference Type BACKGROUND
PMID: 24365607 (View on PubMed)

Esteban A, Alia I, Tobin MJ, Gil A, Gordo F, Vallverdu I, Blanch L, Bonet A, Vazquez A, de Pablo R, Torres A, de La Cal MA, Macias S. Effect of spontaneous breathing trial duration on outcome of attempts to discontinue mechanical ventilation. Spanish Lung Failure Collaborative Group. Am J Respir Crit Care Med. 1999 Feb;159(2):512-8. doi: 10.1164/ajrccm.159.2.9803106.

Reference Type BACKGROUND
PMID: 9927366 (View on PubMed)

Jiang JR, Tsai TH, Jerng JS, Yu CJ, Wu HD, Yang PC. Ultrasonographic evaluation of liver/spleen movements and extubation outcome. Chest. 2004 Jul;126(1):179-85. doi: 10.1378/chest.126.1.179.

Reference Type BACKGROUND
PMID: 15249460 (View on PubMed)

Other Identifiers

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DUS in weaning

Identifier Type: -

Identifier Source: org_study_id

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