Subclavian Versus Inferior Vena Cava Collapsibility Indices.

Reliability of Subclavian Vein Versus Inferior Vena Cava Collapsibility Indices for Preload Assessment.

Traditional methods for intravascular volume status assessment include physical examination, raised leg test, central venous pressure (CVP) and pulmonary artery catheters occlusion pressure (PAWP). Central venous pressure and pulmonary artery occlusion pressure are invasive and associated with significant complications. More recently, a number of less invasive techniques have been introduced, but they lack standardization and reliability. Ultrasonically, inferior vena cava collapsibility can detect hypovolemia non-invasively.

The aim of this study is that measurement of subclavian vein collapsibility index(SCV-CI) could be potential adjunct to IVC-CI where the IVC visualization is impaired or not possible .

-Finding a non-invasive reliable accurate method for evaluation of intravascular volume and response to volume resuscitation.

Inclusion Criteria:

• 1. American society of anaesthesiologists physical status grade I and grade II .

  2. Elective laparotomy. 3. Supine position

Exclusion Criteria:

1. Patient refusal .
2. Portal hypertension .
3. Severe peripheral vascular diseases.
4. Obstructive lung diseases .
5. Right sided heart failure , arrhythmia and valvular heart heart diseases .
6. Body mass index >35 kg/m2