Evaluation of Bedside Methods to Measure Muscularity in Critically Ill Patients
Evaluation of Bedside Methods to Measure Muscularity in Critically Ill Patients: A Prospective Observational Study
Muscle wasting is a significant problem in critically ill patients, with reported losses of a half to three percent per day over the first ten days (for an average 70kg person this equates to 3 to 20kg of muscle loss). Low skeletal muscle mass at admission to the intensive care unit (ICU) and the loss of lean tissue have been associated with negative clinical outcomes, including increased incidence of infections, length of stay, mortality and muscle weakness. It is therefore crucial that technology is utilised to: 1) identify ICU patients with low muscularity on admission, 2) to help understand the factors impacting muscle loss and to 3) assess the effectiveness of interventions aimed at maintaining skeletal muscle mass in this population.
The measurement of lean body mass in patients admitted to the ICU is challenging however, due to the large fluid shifts that occur in this population and logistical issues in moving patients to specialised machinery for body composition analysis. Currently, there is no validated method for accurately assessing a patient's muscle mass at the bedside in the intensive care setting. It is therefore important to investigate the accuracy, feasibility and reliability of bedside methods such as subjective physical assessment of muscle mass, mid arm muscle circumference, ultrasound and bioimpedance analysis to assess muscularity in this population who are primarily bedbound. In order to do this, a critical comparison is required between these methods and muscularity assessed by a "reference" body composition method, such computed tomography (CT) image analysis. Briefly, quantification of skeletal muscle at the abdomen area utilising abdominal CT images has been shown to be highly representative of whole body skeletal muscle volume.
We wish to conduct a pilot, feasibility study (n= 50), which will recruit patients who have a CT scan (containing abdomen area), performed for clinical purposes. Our primary aim will be to investigate whether muscularity assessed with non-invasive bedside methods (ultrasound, bioimpedance analysis, SGA physical assessment, mid arm muscle circumference) are correlated with skeletal muscle mass quantified by a "reference method" (CT image analysis).
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
詳細な説明
Aim Our primary aim is to investigate whether muscularity assessed via bedside ultrasound is correlated with a reference method for estimating whole body skeletal muscle mass (CT image analysis) in the first few days of critical illness.
Our secondary aims are
- To investigate whether muscularity assessed via other bedside methods (bioimpedance spectroscopy, subjective physical assessment and mid arm muscle circumference) are correlated with a reference method for estimating whole body skeletal muscle mass (CT image analysis) in critically ill patients.
- To better understand the association between measured resting energy expenditure and muscularity in the critically ill.
- To observe changes in skeletal muscle mass (in a sub set of patients who have two CT scans) and the impact various factors, including energy and protein delivery has on these changes.
研究の種類
研究の種類
入学 (実際)
入学
連絡先と場所
研究場所
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Victoria
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Melbourne、Victoria、オーストラリア、3004
- The Alfred Hospital
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参加基準
適格基準
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:
- Have had a CT scan of the L3 vertebra performed for clinical reasons ≤24 hours before or ≤72 hours after ICU admission
Exclusion Criteria:
- CT scan performed >48hrs ago
- Death is imminent or deemed highly likely in the next 96 hours
- Are known to be pregnant
- Treating clinician does not believe the study to be in the best interest of the patient
- It is not possible to image two or more muscle groups via ultrasound (i.e. due to trauma, burns, wounds)
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
主要な結果の測定
結果測定 |
時間枠 |
|---|---|
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Mean skeletal muscle mass measured by CT scan analysis at L3 area (cm2)
時間枠:CT performed for clinical reasons ≤24 hours before or ≤72 hours after ICU admission
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CT performed for clinical reasons ≤24 hours before or ≤72 hours after ICU admission
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Mean skeletal muscle mass measured by ultrasound (muscle thickness at each site, cm and rectus femoris CSA, cm2)
時間枠:<48 hours after CT scan containing L3 area
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<48 hours after CT scan containing L3 area
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二次結果の測定
二次結果の測定
結果測定 |
時間枠 |
|---|---|
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Fat free mass (kg), phase angle and impedance ratio measured by bioimpedance spectroscopy
時間枠:<48 hours after CT scan containing L3 area
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<48 hours after CT scan containing L3 area
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Subjective assessment of muscle and fat wasting via SGA (normal, mild-moderate or severe)
時間枠:<48 hours after CT scan containing L3 area
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<48 hours after CT scan containing L3 area
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Mid arm muscle circumference (cm)
時間枠:<48 hours after CT scan containing L3 area
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<48 hours after CT scan containing L3 area
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Mean skeletal muscle mass measured by CT scan analysis at femoral area (cm2)
時間枠:CT performed for clinical reasons ≤24 hours before or ≤72 hours after ICU admission
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CT performed for clinical reasons ≤24 hours before or ≤72 hours after ICU admission
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Measured resting energy expenditure (kilojoules)
時間枠:<48 hours after CT scan containing L3 area
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<48 hours after CT scan containing L3 area
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Intramuscular, subcutaneous and visceral adipose tissue CSA at L3 area (cm2)
時間枠:CT performed for clinical reasons ≤24 hours before or ≤72 hours after ICU admission
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CT performed for clinical reasons ≤24 hours before or ≤72 hours after ICU admission
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協力者と研究者
捜査官
捜査官
- 主任研究者:Kate Lambell, MNutrDiet、La Trobe University and Alfred Health
出版物と役立つリンク
研究記録日
主要日程の研究
研究開始
研究開始
一次修了 (実際)
一次修了
研究の完了 (実際)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
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Observational cohortの臨床試験
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NCT06851585完了救急部門 | カテーテル法、末梢 | カテーテル法 | 血管アクセス装置 | カテーテル