Point of Care Ultrasound and Co-loading in Patients With Spinal-induced Hypotension and Cardiac Diseases

Summary

In elderly patients with cardiac diseases, changes in cardiovascular physiology diminish cardiovascular reserve and predispose to significant hemodynamic instability after spinal anesthesia; hence, such patients could be at risk of postoperative complications. Additionally, point of care ultrasound (POCUS) and transthoracic echocardiography (TTE) are used in clinical practice to evaluate cardiovascular hemodynamics. Inferior vena cava (IVC) and its collapsibility index (CI) have been used in clinical practice for the prediction of post-spinal hypotension. Specifically, the dIVCmax-to-IVCCI ratio \< 48 showed high diagnostic performance among other indices in the prediction of post spinal hypotension in elderly patients with cardiac diseases undergoing proximal fracture repair. Elderly patients also experience high likelihood of dehydration. According to the above findings, the investigators hypothesized that fluid co-loading immediately after spinal anesthesia can lower the incidence of spinal-induced hypotension in dehydrated patients. . For this reason, it is prospectively evaluated echocardiographic indices of the LV and the right ventricle (RV), as well as of the IVC prior to spinal anesthesia in elderly patients with proximal femur fractures who had low LV-EF and increased ratio of BUN-to-creatinine.

Eligibility

Inclusion Criteria:

* All the included patients have BUN-to-creatinne ratio\>20
* LV-EF between 35% and 50%
* Normal RV function indices \[tricuspid annular plane systolic excursion (TAPSE) index \> 16 and tricuspid annular systolic velocity (TASV) \> 10 cm/sec and fractional area change (FAC) \> 35%)\]

Exclusion Criteria:

* Poor acoustic windows,
* Tthose who were included during the initial screening, but they finally found with pulmonary hypertension (peak tricuspid velocity \> 3.4 m/sec), tricuspid/mitral/pulmonary valve regurgitation grade 3 or 4, severe aortic/mitral valve stenosis, and severe mitral annulus calcification on the preoperative echocardiogram.
* All patients with maximum cephalad dermatomal extension of the spinal sensory block below T12 or arterial hypotension related to overt intraoperative bleeding (\>150 cc) are excluded.
* Intraoperrative hypotension due to bleeding and cement placement

Conditions3

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