Objective assessment of the Changes in body composition of critically ill patients is very valuable. Ultrasound stands as a solution due to its portability, bedside availability, and radiation-free technology. Those criteria are crucial for critically ill obstetrics and gynecological cases.
females with age 16 with no upper limit
American Society of Anesthesiologists (ASA) class I, II or III,
admitted to the obstetrics and Gynecology critical care unit
Patient refusal
Critically ill women whether pregnant, peripartum, postoperative, or admitted for any critical illness.
Cohort
Prospective
ultrasound detection of body composition
Diagnostic testMuscle mass and fat thickness assessed at two representative sites (rectus femoris, biceps brachii) per USVALID (Arabella, 2020). Muscle quality graded via validated 4-point Heckmatt echogenicity scale (Grade 1=normal, Grade 4=severe; full criteria in Outcome Measures).Subcutaneous fat thickness(mm) measured on rectus femoris. FLUID protocol for oedema: 36-site USEG 5-point scale . Day 0, day 2, then every 2 days untill at in-stay deterioration or death or discharge.
change in body composition-muscular element
Change in muscle thickness (mm) and change in muscle quality, assessed by ultrasound echogenicity at two representative sites: rectus femoris (lower limb) and biceps brachii (upper limb). Muscle quality is graded using the validated four-point Heckmatt scale: Grade 1 = normal echogenicity with distinct bone reflection; Grade 2 = increased echogenicity with preserved architecture and normal bone reflection; Grade 3 = further increased echogenicity with some loss of architecture and reduced bone reflection; Grade 4 = markedly increased echogenicity with total loss of architecture and absent bone reflection. A derived ordinal muscle severity category is calculated from the highest grade observed across the two sites.
change in body composition-fat element
change in thickness of subcutaneous fat measured in mm. A derived categorical adiposity classification (low, normal, or high adipose reserve) is also calculated from this measurement.
change in body composition-extreacellular oedema element
The examiner will use a 5-point scale of ultrasonic subcutaneous edema grade (USEG) to evaluate subcutaneous edema at each site based on echo intensity, tissue transparency, and fluid properties. The final ultrasonic subcutaneous edema score (USES) is calculated by adding scores from 36 subcutaneous sites (0-144), regionally grouped: hands (0-8), arms (0-16), thoracic wall (0-32), abdominal wall (0-32), thigh (0-24), calves (0-24), feet (0-8), with regional totals averaged to a 0-4 score per region. Lower scores indicate lower oedema severity. A derived categorical oedema severity classification is also calculated from the total score.
co-relation of the change of any elements of body composition with poor outcomes suchs such as death, need for ventilatory or circulatory support or increase the length of stay in icu.
Positive or negative correlation between change in any body composition element (muscular, fat, extracellular oedema) and poor clinical outcomes, measured by frequency of occurrence of poor outcomes in patients with positive change in any element. The muscle, oedema, and adiposity classifications above are combined into a single five-category bedside phenotype (Resilient, Vulnerable, Oedematous, Metabolically Compromised, Extreme Metabolic Risk), assessed at admission and at the point of in-stay deterioration; this composite phenotype is the primary exposure examined against outcome. Poor outcome is defined as a composite of mortality, need for ventilatory support, or need for circulatory support. ICU length of stay is analyzed separately as a continuous outcome. Additional outcomes recorded include failed extubation, need for renal replacement therapy, and need for blood transfusion
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