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Comparative assessment of hemodynamic changes and outcomes in ventilator weaning

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Jul 31, 2025

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Fig. 1.

Intercomparison of hemodynamic parameters between the VTI, SV, and CO. CO: cardiac output; SV: stroke volume; TEE: transesophageal echocardiography; TTE: transthoracic echocardiography; VCV: volume-controlled ventilation; VPS: variable pressure support; VTI: velocity time integral
Intercomparison of hemodynamic parameters between the VTI, SV, and CO. CO: cardiac output; SV: stroke volume; TEE: transesophageal echocardiography; TTE: transthoracic echocardiography; VCV: volume-controlled ventilation; VPS: variable pressure support; VTI: velocity time integral

Analysis of TTE and TEE

Ventilation mode Parameter TEE (mean ± S.D) TTE (mean ± S.D) p-value
VCV VTI 21.11±3.03 21.30±3.08 0.313
SV 65.95±17.66 65.95±17.37 1

PS VTI 19.65±2.48 19.33±2.74 0.202
SV 61.58±17.87 60.45±18.54 0.356

VPS VTI 18.30±3.07 18.53±2.95 0.108
SV 57.93±19.73 58.48±19.88 0.079

The Outcomes Statistics of the hemodynamic assessment between the two arms

Outcomes Arm-A (VPS group) Arm-B (PS group) p-value
Ventilator days (mean ± S.D) 9.05± 4.56 9.30± 5.97 0.882
Length of stay (mean ± S.D) 16.20±6.92 17.25±7.64 0.651

Weaning trial Yes (n, %) 12 (60%) 10 (50%) 0.525
No (n, %) 8 (40%) 10 (50%)

Survival Yes (n, %) 10 (50%) 8 (40%) 0.525
No (n, %) 10 (50%) 12 (60%)

Inter-statistical comparison between the three modes in both arms

Parameter VCV (mean ± SD) VPS (mean ± SD) p-value
TEE VTI 21.11±3.03 18.30±3.07 0.02
TTE VTI 21.30±3.08 18.53±2.95 0.04
TEE SV 65.95±17.66 57.93±19.73 0.03
TTE SV 65.95±17.37 58.48±19.88 0.05
CO 5.57±1.54 4.83±1.58 0.01

Parameter VCV (mean ± S.D) PS (mean ± S.D) p-value
TEE VTI 21.11±3.03 19.65±2.48 0.04
TTE VTI 21.30±3.08 19.33±2.74 0.05
TEE SV 65.95±17.66 61.58±17.87 0.03
TTE SV 65.95±17.37 60.45±18.54 0.02
CO 5.57±1.54 5.18±1.50 0.04

Parameter VPS (mean ± S.D) PS (mean ± S.D) p-value
TEE VTI 18.30±3.07 19.65±2.48 0.004
TTE VTI 18.53±2.95 19.33±2.74 0.05
TEE SV 57.93±19.73 61.58±17.87 0.002
TTE SV 58.48±19.88 60.45±18.54 0.059
CO 4.83±1.58 5.18±1.50 0.04

Patient characteristics and data during the study

Data Arm-A (VPS group) Arm-B (PS group) p-value
Gender Male 13 (65%) 13 (65%) 1
Female 7 (35%) 7 (35%)

Co-morbidities
Hypertension 13 (65%) 8 (40%) 0.113
Diabetes Mellitus 10 (50%) 4 (20%) 0.047
Chronic Kidney Diseases 2 (10%) 5 (25%) 0.407
Ischemic Heart disease 4 (20%) 3 (15%) 1
Chronic obstructive pulmonary disease 3 (15%) 2 (10%) 1

Clinical Data (mean± S.D)
HR 88.35±19.98 882.65±13.55 0.298
MAP 73.40±7.76 70.20±7.17 0.183

Echocardiographic Data (mean± S.D)
LVOT diameter (cm) 2.05±0.33 1.93±0.30 0.20
TEE VTI (VCV) 20.50±2.74 21.70±3.26 0.223
TTE VTI (VCV) 20.50±2.91 22.10±3.11 0.101
TEE SV (VCV) 67.95±18.63 63.95±16.87 0.481
TTE SV (VCV) 68.00±18.17 63.90±16.74 0.463
CO (VCV) 5.74±1.34 5.39±1.73 0.473