Application of CLCVP Technique in Early Intervention of CSA-AKI

Summary

The goal of this clinical trial is to learn about in postoperative acute kidney injury in cardiac surgery. The main questions it aims to answer are: 1. Controlled low central venous pressure (CLCVP) technique can reduce the occurrence of cardiac surgery-associated acute kidney injury (CSA-AKI) by reducing venous congestion and increasing renal perfusion pressure. 2. CLCVP technique does not increase the risk of postoperative cognitive dysfunction (POCD) during cardiac surgery. Participants who are assigned to the intervention group will receive CLCVP technique. Specific methods are as follows: First,20min after the end of cardiopulmonary bypass, on the basis of ensuring that the mean arterial pressure (MAP) ≥ 60mmHg, the patients will accept dorsal elevated position. After that, if the patient's central venous pressure (CVP) is less than 10mmHg, nitroglycerin will be pumped at 0.2ug/ (kg \* min). If the patient's CVP is still greater than or equal 10mmHg, we increase the dose by 0.2ug/ (kg \* min) and pump again for 5min, and the like. Until the patient's CVP is less than 10mmHg or the dose of nitroglycerin increases to 1ug/ (kg \* min), the current dose is maintained until the end of surgery. If participants are assigned to the control group, no intervention measures will be taken. The researchers will compare the intervention group with the control group to see the occurrence of CSA-AKI and POCD after cardiac surgery.

Timeline

Start

2023-05-01

Primary completion

2025-08-31

Completion

2025-12-30

Publications

• Background Chen L, Hong L, Ma A, Chen Y, Xiao Y, Jiang F, Huang R, Zhang C, Bu X, Ge Y, Zhou J. Intraoperative venous congestion rather than hypotension is associated with acute adverse kidney events after cardiac surgery: a retrospective cohort study. Br J Anaesth. 2022 May;128(5):785-795. doi: 10.1016/j.bja.2022.01.032. Epub 2022 Mar 4.
• Background Lopez MG, Shotwell MS, Morse J, Liang Y, Wanderer JP, Absi TS, Balsara KR, Levack MM, Shah AS, Hernandez A, Billings FT 4th. Intraoperative venous congestion and acute kidney injury in cardiac surgery: an observational cohort study. Br J Anaesth. 2021 Mar;126(3):599-607. doi: 10.1016/j.bja.2020.12.028. Epub 2021 Feb 4.
• Background Correa-Gallego C, Berman A, Denis SC, Langdon-Embry L, O'Connor D, Arslan-Carlon V, Kingham TP, D'Angelica MI, Allen PJ, Fong Y, DeMatteo RP, Jarnagin WR, Melendez J, Fischer M. Renal function after low central venous pressure-assisted liver resection: assessment of 2116 cases. HPB (Oxford). 2015 Mar;17(3):258-64. doi: 10.1111/hpb.12347. Epub 2014 Nov 11.
• Background Liu TS, Shen QH, Zhou XY, Shen X, Lai L, Hou XM, Liu K. Application of controlled low central venous pressure during hepatectomy: A systematic review and meta-analysis. J Clin Anesth. 2021 Dec;75:110467. doi: 10.1016/j.jclinane.2021.110467. Epub 2021 Aug 1.
• Cheng Y, Li L, Zhang J, Zhou J, Chen L, Shi H, Wang Y, He W, Yang F. Prediction of intraoperative acquired pressure injury in elderly cardiac surgery patients via machine learning: model development with the MIMIC-IV and external validation. BMC Med Inform Decis Mak. 2025 Dec 29;26(1):33. doi: 10.1186/s12911-025-03325-9.

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