Diaphragm Ultrasound in Weaning From Mechanical Ventilation
The Efficacy of Ultrasound Assessment of Diaphragmatic Function in Guiding Weaning From Mechanical Ventilation in Critically Ill Patients With Abdominal Sepsis
調査の概要
状態
条件
詳細な説明
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.
Diaphragmatic dysfunction is a common cause of weaning failure (2) 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. In this study we will evaluate the ability of the diaphragmatic function to predict weaning success in patients with abdominal sepsis.
After weaning, patients will be divided into two groups; group of successful weaning (group S) and group with failed weaning (group F) both groups will be compared as regards all clinical, laboratory, and ultrasonographic parameters recorded before weaning, further analysis will be done for patients with repeated trials of weaning (more than one trial or more than one week MV) and those with simple weaning (first time for weaning).
A 7-10 Mega Hertz linear ultrasound probe (Mindray machine) set to B mode, the diaphragm will be visualized by placing the transducer perpendicular to the chest wall, in the eighth or ninth intercostal space, between the anterior axillary and the midaxillary lines, to observe the zone of apposition of the muscle 0.5 to 2 cm below the costophrenic sinus.
The diaphragm thickness will be measured from the middle of the pleural line to the middle of the peritoneal line. Then, the diaphragmatic fraction thickening (DTF) will be calculated as percentage Diaphragmatic movement will be measured in all patients with a 3.5 Mega Hertz US probe placed over one of the lower intercostal spaces in the right anterior axillary line for the right diaphragm and the left midaxillary line for the left diaphragm.
研究の種類
入学 (実際)
連絡先と場所
研究場所
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Cairo、エジプト
- Cairo University
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
サンプリング方法
調査対象母集団
説明
Inclusion Criteria:
- Critically ill patients with abdominal sepsis with history of MV for more than 48 hours
Exclusion Criteria:
- Age < 18 years and surgical dressings over the right lower rib cage which would preclude ultrasound examination will be excluded. Also, patients with chest trauma, thoracotomy, diaphragmatic paralysis, diaphragmatic dysfunction, diaphragmatic injury, diaphragmatic surgery and patients with neuromuscular diseases
研究計画
研究はどのように設計されていますか?
デザインの詳細
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
---|---|---|
Diaphragmatic thickening fraction
時間枠:five minutes before spontaneous breathing trial
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(calculated as maximum thickness - minimum thickness / maximum thickness)
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five minutes before spontaneous breathing trial
|
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
---|---|---|
Diaphragmatic excursion
時間枠:five minutes before spontaneous breathing trial and five minutes before patient extubation
|
(measured in millimeters)
|
five minutes before spontaneous breathing trial and five minutes before patient extubation
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Rapid shallow breathing index (RSBI)
時間枠:five minutes before spontaneous breathing trial
|
Respiratory rate/tidal volume in litres
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five minutes before spontaneous breathing trial
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Arterial blood gases
時間枠:five minutes before spontaneous breathing trial and five minutes before patient extubation
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Partial oxygen pressure and Partial carbon dioxide pressure
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five minutes before spontaneous breathing trial and five minutes before patient extubation
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Number of weaning trials
時間枠:during the last 7 days
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number of weaning trials before this trial
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during the last 7 days
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Heart rate
時間枠:five minutes before spontaneous breathing trial and five minutes before patient extubation
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the patient heart rate measured as beat.minute
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five minutes before spontaneous breathing trial and five minutes before patient extubation
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Arterial blood pressure
時間枠:five minutes before spontaneous breathing trial and five minutes before patient extubation
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systolic and diastolic blood pressure measured in mmHg
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five minutes before spontaneous breathing trial and five minutes before patient extubation
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研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (実際)
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
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最終確認日
詳しくは
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