scholarly journals Effect of liver resection-induced increases in hepatic venous pressure gradient on development of postoperative acute kidney injury

2022 ◽  
Vol 23 (1) ◽  
Author(s):  
Christian Reiterer ◽  
Alexander Taschner ◽  
Florian Luf ◽  
Manfred Hecking ◽  
Dietmar Tamandl ◽  
...  
Keyword(s):  
Liver Resection ◽  
Venous Pressure ◽  
Portal Pressure ◽  
Kidney Injury ◽  
Renin Angiotensin System ◽  
Plasma Renin ◽  
Secondary Outcome ◽  
Before And After ◽  
The Impact ◽  
Postoperative Aki

Abstract Background The impact of changes in portal pressure before and after liver resection (defined as ΔHVPG) on postoperative kidney function remains unknown. Therefore, we investigated the effect of ΔHVPG on (i) the incidence of postoperative AKI and (ii) the renin-angiotensin system (RAAS) and sympathetic nervous system (SNS) activity. Methods We included 30 patients undergoing partial liver resection. Our primary outcome was postoperative AKI according to KDIGO criteria. For our secondary outcome we assessed the plasma renin, aldosterone, noradrenaline, adrenaline, dopamine and vasopressin concentrations prior and 2 h after induction of anaesthesia, on the first and fifth postoperative day. HVPG was measured prior and immediately after liver resection. Results ΔHVPG could be measured in 21 patients with 12 patients HVPG showing increases in HVPG (∆HVPG≥1 mmHg) while 9 patients remained stable. AKI developed in 7/12 of patients with increasing HVPG, but only in 2/9 of patients with stable ΔHVPG (p = 0.302). Noradrenalin levels were significantly higher in patients with increasing ΔHVPG than in patients with stable ΔHVPG. (p = 0.009). Biomarkers reflecting RAAS and SNS activity remained similar in patients with increasing vs. stable ΔHVPG. Conclusions Patients with increased HVPG had higher postoperative creatinine concentrations, however, the incidence of AKI was similar between patients with increased versus stable HVPG.

scholarly journals Effect of Liver Resection-induced Increases in Hepatic Venous Pressure Gradient on Development of Postoperative Acute Kidney Injury

2021 ◽  
Author(s):  
Christian Reiterer ◽  
Alexander Taschner ◽  
Florian Luf ◽  
Manfred Hecking ◽  
Dietmar Tamandl ◽  
...  
Keyword(s):  
Liver Resection ◽  
Venous Pressure ◽  
Portal Pressure ◽  
Kidney Injury ◽  
Renin Angiotensin System ◽  
Plasma Renin ◽  
Secondary Outcome ◽  
Before And After ◽  
The Impact ◽  
Postoperative Aki

Abstract Background: The impact of changes in portal pressure before and after liver resection (defined as ΔHVPG) on postoperative renal function remains unknown. Therefore, we investigated the effect of ΔHVPG on (i) the incidence of postoperative AKI and (ii) the renin-angiotensin system (RAAS) and sympathetic nervous system (SNS) activity. Methods: We included 30 patients undergoing partial liver resection. Our primary outcome was postoperative AKI according to KDIGO criteria. For our secondary outcome we assessed the plasma renin, aldosterone, noradrenaline, adrenaline, dopamine and vasopressin concentrations prior and 2 hours after induction of anaesthesia, on the first and fifth postoperative day. HVPG was measured prior and immediately after liver resection.Results: ΔHVPG could be measured in 21 patients with 12 patients HVPG showing increases in HVPG (∆HVPG≥1mmHg) while 9 patients remained stable. AKI developed in 7/12 of patients with increasing HVPG, but only in 2/9 of patients with stable DHVPG (p=0.302). Noradrenalin levels were significantly higher in patients with increasing DHVPG than in patients with stable DHVPG. (p=0.009). Biomarkers reflecting RAAS and SNS activity remained similar in patients with increasing vs. stable DHVPG. Conclusions: Patients with increasing HVPG were more likely to develop postoperative AKI as compared those with stable HVPG values.

Abstract P315: Vascular AT1 Angiotensin Receptors Do Not Contribute to Albuminuria or Hyperfiltration in Diabetes

Hypertension ◽  
2016 ◽  
Vol 68 (suppl_1) ◽  
Author(s):  
Matthew A Sparks ◽  
Stacy Johnson ◽  
Rishav Adhikari ◽  
Edward Diaz ◽  
Aaron Kupin ◽  
...  
Keyword(s):  
Kidney Injury ◽  
Renin Angiotensin System ◽  
Diabetic Control ◽  
Angiotensin Receptors ◽  
Mrna Levels ◽  
Glucose Levels ◽  
Blood Glucose Levels ◽  
Significant Difference ◽  
Akita Mice ◽  
The Impact

Blockade of the renin angiotensin system (RAS) reduces albuminuria, attenuates hyperfiltration, and slows the progression of diabetic nephropathy (DN) by preventing vasoconstriction and subsequent increases in glomerular hydrostatic pressure. Since RAS blockade disrupts Ang II signaling in all tissues, the specific contribution of vascular actions of AT1 receptors in DN has been difficult to delineate. Therefore, we generated 129 SvEv mice with cell-specific loss of AT1A from VSMCs (SMKOs) using Cre-loxp . To eliminate AT1R from VSMCs, we crossed the SMKO mice with AT1BR -/- mice, lacking the minor AT1B isoform. To study the impact of vascular AT1R in DN, we crossed the AT1B- null SMKOs with mice having the Ins2 C96Y AKITA mutation, which develop DM1 early. To enhance kidney injury, mice underwent uninephrectomy (UNX) at 11wks. Blood glucose levels were elevated (~500mg/dL) and similar at 10, 16 and 24wks between the two groups. Prior to UNX, albuminuria was similar between Control AKITA and AT1B- null SMKO AKITA (62±10 Control AKITA versus 107±27 μg/24hrs SMKO AKITA, P=NS). Albuminuria increased with age in both Control Akita and AT1B- null SMKO AKITA but without significant differences between the groups at 16wks (307±106 vs 313±117 μg/24hrs; P=NS) or 24wks (494±236 versus 730±217 μg/24hrs; P=NS), despite a trend toward higher albuminuria in AT1B- null SMKO AKITAs. There was no significant difference in GFR (using FITC-inulin) between non-diabetic Control and AT1B- null SMKO (15.6±1.2 vs 14.8±0.8 μl/min/g BW), and hyperfiltration was observed in both Control AKITA (23.7±2.4 μl/min/g BW; P=0.003) and AT1B- null SMKO AKITA mice (20.7±1.7 μl/min/g BW; P=0.01) relative to their non-diabetic comparators. However, there was no significant difference in GFR between ControlAKITA and AT1B- null SMKO AKITA (P=NS). Finally we measured mRNA levels of putative kidney injury markers by RTqPCR and found no differences in levels of Col1A1 , NGAL , or TGFB1 mRNA between Control AKITA and AT1B null SMKO AKITA. Our studies indicate that the absence of vascular AT1R responses is not sufficient to reduce albuminuria and prevent hyperfiltration in a mouse model of DN. This suggests that blockade of AT1R in other cell lineages may contribute to beneficial actions of ARBs in DN.

scholarly journals Renin–angiotensin system blocker use and the risk of acute kidney injury after colorectal cancer surgery: a population-based cohort study

BMJ Open ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. e032964
Author(s):  
Charlotte Slagelse ◽  
H Gammelager ◽  
Lene Hjerrild Iversen ◽  
Kathleen D Liu ◽  
Henrik T Toft Sørensen ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Acute Kidney Injury ◽  
Cohort Study ◽  
Angiotensin Receptor Blockers ◽  
Kidney Injury ◽  
Population Based ◽  
Adjusted Risk ◽  
Increased Risk ◽  
The Impact ◽  
Postoperative Aki

ObjectivesIt is unknown whether preoperative use of ACE inhibitors (ACE-I) or angiotensin receptor blockers (ARBs) affects the risk of acute kidney injury (AKI) after colorectal cancer (CRC) surgery. We assessed the impact of preoperative ACE-I/ARB use on risk of AKI after CRC surgery.DesignObservational cohort study. Patients were divided into three exposure groups—current, former and non-users—through reimbursed prescriptions within 365 days before the surgery. AKI within 7 days after surgery was defined according to the current Kidney Disease Improving Global Outcome consensus criteria.SettingPopulation-based Danish medical databases.ParticipantsA total of 9932 patients undergoing incident CRC surgery during 2005–2014 in northern Denmark were included through the Danish Colorectal Cancer Group Database.Outcome measureWe computed cumulative incidence proportions (risk) of AKI with 95% CIs for current, former and non-users of ACE-I/ARB, including death as a competing risk. We compared current and former users with non-users by computing adjusted risk ratios (aRRs) using log-binomial regression adjusted for demographics, comorbidities and CRC-related characteristics. We stratified the analyses of ACE-I/ARB users to address any difference in impact within relevant subgroups.ResultsTwenty-one per cent were ACE-I/ARB current users, 6.4% former users and 72.3% non-users. The 7-day postoperative AKI risk for current, former and non-users was 26.4% (95% CI 24.6% to 28.3%), 25.2% (21.9% to 28.6%) and 17.8% (17.0% to 18.7%), respectively. The aRRs of AKI were 1.20 (1.09 to 1.32) and 1.16 (1.01 to 1.34) for current and former users, compared with non-users. The relative risk of AKI in current compared with non-users was consistent in all subgroups, except for higher aRR in patients with a history of hypertension.ConclusionsBeing a current or former user of ACE-I/ARBs is associated with an increased risk of postoperative AKI compared with non-users. Although it may not be a drug effect, users of ACE-I/ARBs should be considered a risk group for postoperative AKI.

Enhanced intrarenal receptor-mediated prorenin activation in chronic progressive anti-thymocyte serum nephritis rats on high salt intake

2012 ◽  
Vol 303 (1) ◽  
pp. F130-F138 ◽  
Author(s):  
Yanjie Huang ◽  
Tatsuo Yamamoto ◽  
Taro Misaki ◽  
Hiroyuki Suzuki ◽  
Akashi Togawa ◽  
...  
Keyword(s):  
Apical Membrane ◽  
Salt Intake ◽  
Kidney Injury ◽  
Renin Angiotensin System ◽  
Plasma Renin ◽  
High Salt ◽  
Ang Ii ◽  
Kidney Fibrosis ◽  
High Salt Intake ◽  
Collecting Ducts

Despite suppression of the circulating renin-angiotensin system (RAS), high salt intake (HSI) aggravates kidney injury in chronic kidney disease. To elucidate the effect of HSI on intrarenal RAS, we investigated the levels of intrarenal prorenin, renin, (pro)renin receptor (PRR), receptor-mediated prorenin activation, and ANG II in chronic anti-thymocyte serum (ATS) nephritic rats on HSI. Kidney fibrosis grew more severe in the nephritic rats on HSI than normal salt intake. Despite suppression of plasma renin and ANG II, marked increases in tubular prorenin and renin proteins without concomitant rises in renin mRNA, non-proteolytically activated prorenin, and ANG II were noted in the nephritic rats on HSI. Redistribution of PRR from the cytoplasm to the apical membrane, along with elevated non-proteolytically activated prorenin and ANG II, was observed in the collecting ducts and connecting tubules in the nephritic rats on HSI. Olmesartan decreased cortical prorenin, non-proteolytically activated prorenin and ANG II, and apical membranous PRR in the collecting ducts and connecting tubules, and attenuated the renal lesions. Cell surface trafficking of PRR was enhanced by ANG II and was suppressed by olmesartan in Madin-Darby canine kidney cells. These data suggest the involvement of the ANG II-dependent increase in apical membrane PRR in the augmentation of intrarenal binding of prorenin and renin, followed by nonproteolytic activation of prorenin, enhancement of renin catalytic activity, ANG II generation, and progression of kidney fibrosis in the nephritic rat kidneys on HSI. The origin of the increased tubular prorenin and renin remains to be clarified. Further studies measuring the urinary prorenin and renin are needed.

scholarly journals High Central Venous Pressure after Cardiac Surgery Might Depict Hemodynamic Deterioration Associated with Increased Morbidity and Mortality

2021 ◽  
Vol 10 (17) ◽  
pp. 3945
Author(s):  
Fridtjof Schiefenhövel ◽  
Ralf F. Trauzeddel ◽  
Michael Sander ◽  
Matthias Heringlake ◽  
Heinrich V. Groesdonk ◽  
...  
Keyword(s):  
Cardiac Surgery ◽  
Central Venous Pressure ◽  
Venous Pressure ◽  
Kidney Injury ◽  
Morbidity And Mortality ◽  
Central Venous ◽  
Icu Mortality ◽  
Roc Curve Analysis ◽  
Hemodynamic Deterioration ◽  
The Impact

Background: Cardiac surgery patients represent a high-risk cohort in intensive care units (ICUs). Central venous pressure (CVP) measurement seems to remain an integral part in hemodynamic monitoring, especially in cardio-surgical ICUs. However, its value as a prognostic marker for organ failure is still unclear. Therefore, we analyzed postoperative CVP values after adult cardiac surgery in a large cohort with regard to its prognostic value for morbidity and mortality. Methods: All adult patients admitted to our ICUs between 2006 and 2019 after cardiac surgery were eligible for inclusion in the study (n = 11,198). We calculated the median initial CVP (miCVP) after admission to the ICU, which returned valid values for 9802 patients. An ROC curve analysis for optimal cut-off miCVP to predict ICU mortality was conducted with consecutive patient allocation into a (a) low miCVP (LCVP) group (≤11 mmHg) and (b) high miCVP (HCVP) group (>11 mmHg). We analyzed the impact of high miCVP on morbidity and mortality by propensity score matching (PSM) and logistic regression. Results: ICU mortality was increased in HCVP patients. In addition, patients in the HCVP group required longer mechanical ventilation, had a higher incidence of acute kidney injury, were more frequently treated with renal replacement therapy, and showed a higher risk for postoperative liver dysfunction, parametrized by a postoperative rise of ≥ 10 in MELD Score. Multiple regression analysis confirmed HCVP has an effect on postoperative ICU-mortality and intrahospital mortality, which seems to be independent. Conclusions: A high initial CVP in the early postoperative ICU course after cardiac surgery is associated with worse patient outcome. Whether or not CVP, as a readily and constantly available hemodynamic parameter, should promote clinical efforts regarding diagnostics and/or treatment, warrants further investigations.

Liver perfusion scintigraphy prior to and after transjugular intrahepatic portosystemic shunts (TIPS) in patients with portal hypertension

2000 ◽  
Vol 39 (05) ◽  
pp. 139-141 ◽  
Author(s):  
A. Schoniburg ◽  
K. A. Brensing ◽  
K. Reichmann ◽  
M. Bangard ◽  
B. Overbeck ◽  
...  
Keyword(s):  
Portal Hypertension ◽  
Liver Perfusion ◽  
Venous Pressure ◽  
Portal Pressure ◽  
Interventional Treatment ◽  
Perfusion Scintigraphy ◽  
Portosystemic Shunts ◽  
Shunt Procedure ◽  
Before And After ◽  
Intrahepatic Portosystemic Shunt

Summary Purpose: This investigation was performed to compare the hemodynamic results of the transjugular intrahepatic portosystemic shunt, a new interventional treatment for portal hypertension, with those observed after the established surgical shunt interventions. Methods: We examined 22 patients with portal hypertension due to liver cirrhosis before and after elective TIPS by liver perfusion scintigraphy. The relative portal perfusion was determined before and after the shunt procedure. Additionally, we measured the portal pressure gradient (PPG: portal-central venous pressure, mmHg). Results: Prior to TIPS, the relative portal perfusion was significantly reduced to 22 ± 9.1%. After the intervention we calculated values of 23.1 ± 10,7% in the TIPS-group (p = 0.67; not significant). In spite of unchanged portal perfusion, the portal pressure was significantly (p <0.001) reduced from 25.6 ± 5.3 to 14.8 ± 4 mm Hg. Conclusion: These results suggest that the reduction of portal hypertension by TIPS is effective. The portal perfusion is maintained by TIPS suggesting that liver perfusion is preserved to a higher degree.

Changes in Liver and Spleen Stiffness by Virtual Touch Quantification Technique after Balloon-Occluded Retrograde Transvenous Obliteration of Gastric Varices and Exacerbation of Esophageal Varices: A Preliminary Study

2019 ◽  
Vol 41 (02) ◽  
pp. 157-166
Author(s):  
Yoshitaka Takuma ◽  
Youichi Morimoto ◽  
Hiroyuki Takabatake ◽  
Junko Tomokuni ◽  
Akiko Sahara ◽  
...  
Keyword(s):  
Esophageal Varices ◽  
Venous Pressure ◽  
Portal Pressure ◽  
Liver Stiffness ◽  
Roc Curves ◽  
Gastric Varices ◽  
Roc Curve Analysis ◽  
Before And After ◽  
Spleen Stiffness ◽  
Preliminary Study

Abstract Purpose To assess liver stiffness (LS) and spleen stiffness (SS) values measured by virtual touch quantification (VTQ) technique in the monitoring of portal pressure and their usefulness for the prediction of the exacerbation of esophageal varices (EV) in patients with gastric varices undergoing balloon-occluded retrograde transvenous obliteration (B-RTO). Materials and Methods The LS, SS, and hepatic venous pressure gradient (HVPG) were measured in 20 patients both before and after B-RTO. The change in each parameter between the two groups (EV exacerbation and non-exacerbation groups) was compared by analysis of variance. The efficacy of the parameters for the prediction of the exacerbation of EV was analyzed using a receiver operating characteristic (ROC) curve analysis. Results 9 patients (40.9 %) exhibited an exacerbation of EV within 24 months after B-RTO. Significant changes were observed in the HVPG and SS after B-RTO between the two groups (EV exacerbation group vs. non-exacerbation group: HVPG before 12.7 ± 4.4 mmHg vs. 11.0 ± 4.4 mmHg; HVPG after 19.6 ± 6.0 mmHg vs. 13.6 ± 3.1 mmHg P = 0.003; SS before 3.40 ± 0.50 m/s vs. 3.20 ± 0.51 m/s; SS after 3.74 ± 0.53 m/s vs. 3.34 ± 0.43 m/s P = 0.016). However, no significant changes in LS were observed between the two groups. The area under the ROC curves of elevation in HVPG and SS for the prediction of the exacerbation of EV after B-RTO were 0.833 and 0.818, respectively. Conclusion Elevation of the HVPG and SS measured by VTQ after B-RTO was useful for the prediction of the exacerbation of EV.

scholarly journals 1994. Impact of Pharmacist-initiated MRSA Nasal PCR Protocol on Pneumonia Therapy in a Community Teaching Hospital

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S669-S669
Author(s):  
Selena Pham ◽  
Abby Sturm ◽  
Lisa Dumkow ◽  
Joshua Jacoby ◽  
Nnaemeka Egwuatu
Keyword(s):  
Median Time ◽  
Teaching Hospital ◽  
Adverse Drug Events ◽  
Kidney Injury ◽  
Nasopharyngeal Swab ◽  
Protocol Implementation ◽  
Before And After ◽  
Quasi Experimental ◽  
The Impact ◽  
Community Teaching

Abstract Background Methicillin-resistant Staphylococcus aureus (MRSA) nasal PCR testing can rapidly detect MRSA colonization via nasopharyngeal swab. With a high negative predictive value for MRSA pneumonia, this test may help minimize the duration of anti-MRSA therapy and associated adverse drug events. This study aimed to evaluate the impact of a pharmacist-initiated MRSA nasal PCR protocol on pneumonia therapy in a community teaching hospital. Methods This retrospective, quasi-experimental study evaluated adult patients with pneumonia before and after the implementation of a pharmacist-initiated MRSA nasal PCR protocol. The GeneXpert MRSA/SA Nasal Complete Assay was utilized for PCR testing. Prior to protocol implementation the MRSA nasal PCR was not routinely used to assist in pneumonia treatment decisions. Following protocol implementation, pharmacists ordered MRSA PCR testing after an order for anti-MRSA pneumonia therapy; however, prescriber approval was required to discontinue therapy following negative result. The primary outcome of this study was to compare the duration of anti-MRSA therapy between the pre-PCR group (June 1–November 1, 2017) and PCR group (June 1–November 1, 2018). Secondary comparisons included the duration of antipseudomonal therapy, time from IV to PO interchange, adverse events, and clinical outcomes between groups. Results 210 patients were included (pre-PCR n = 138, PCR n = 72). Vancomycin was the anti-MRSA therapy ordered for all patients in both groups. In the PCR group, the median time from vancomycin order to PCR order was 2.8 hours (0–45.6 hours), while median time from PCR order to PCR result was 4.4 hours (0.6–31.5 hours). The PCR result was negative for 63 patients (87.5%) and 56 (88.9%) vancomycin orders were discontinued within 24 hours of the negative result. The mean duration of vancomycin therapy was significantly shorter in the PCR group (2.5 vs. 1.4 days, P < 0.001) as well as duration of IV therapy (5 vs. 3.9 days, P = 0.003). There was no difference between groups in duration of antipseudomonal therapy (P = 0.425), acute kidney injury (P = 0.332), 30-day readmission (P = 0.137), or 30-day mortality (P = 0.179). Conclusion A pharmacist-led MRSA nasal PCR protocol significantly decreased the duration of anti-MRSA therapy and IV antibiotic duration in patients with pneumonia. Disclosures All authors: No reported disclosures.

scholarly journals Measurement of Equilibrium Angiotensin II in the Diagnosis of Primary Aldosteronism

2020 ◽  
Vol 66 (3) ◽  
pp. 483-492 ◽  
Author(s):  
Zeng Guo ◽  
Marko Poglitsch ◽  
Brett C McWhinney ◽  
Jacobus P J Ungerer ◽  
Ashraf H Ahmed ◽  
...  
Keyword(s):  
Angiotensin Ii ◽  
Primary Aldosteronism ◽  
Renin Angiotensin System ◽  
Plasma Renin ◽  
Dynamic Changes ◽  
Physiological Factors ◽  
Angiotensin System ◽  
Low Concentrations ◽  
Good Consistency ◽  
The Impact

Abstract Background Many medications (including most antihypertensives) and physiological factors affect the aldosterone/renin ratio (ARR) when screening for primary aldosteronism (PA). We sought to validate a novel equilibrium angiotensin II (eqAngII) assay and compare correlations between the aldosterone/angiotensin II ratio (AA2R) and the current ARR under conditions affecting the renin-angiotensin system. Methods Among 78 patients recruited, PA was excluded in 22 and confirmed in 56 by fludrocortisone suppression testing (FST). Peripheral levels of eqAngII, plasma renin activity (PRA) and direct renin concentration (DRC) were measured. Results EqAngII showed good consistency with DRC and PRA independent of PA diagnosis, posture, and fludrocortisone administration. EqAngII showed close (P &lt; 0.01) correlations with DRC (r = 0.691) and PRA (r = 0.754) during FST. DRC and PRA were below their assays’ functional sensitivity in 43.9% and 15.1%, respectively, of the total 312 samples compared with only 7.4% for eqAngII (P &lt; 0.01). Bland-Altman analysis revealed an overestimation of PRA and DRC compared with eqAngII in a subset of samples with low renin levels. The AA2R showed not only consistent changes with the ARR but also close (P &lt; 0.01) correlations with the ARR, whether renin was measured by DRC (r = 0.878) or PRA (r = 0.880). Conclusions Dynamic changes of eqAngII and the AA2R show good consistency and close correlations with renin and the ARR. The eqAngII assay shows better sensitivity than DRC and PRA assays, especially at low concentrations. Whether the AA2R can reduce the impact of some factors that influence the diagnostic power of the ARR warrants further study.

scholarly journals Association of intraoperative hypotension with acute kidney injury after liver resection surgery: an observational cohort study

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Pingping Liao ◽  
Shuo Zhao ◽  
Lin Lyu ◽  
Xuanlong Yi ◽  
Xiangyu Ji ◽  
...  
Keyword(s):  
Risk Factors ◽  
Acute Kidney Injury ◽  
Liver Resection ◽  
Kidney Injury ◽  
Major Complication ◽  
Exclusion Criteria ◽  
Intraoperative Hypotension ◽  
Observational Cohort ◽  
Multivariable Regression ◽  
Postoperative Aki

Abstract Background Acute kidney injury (AKI) is a major complication following liver resection. The aim of this study was to determine the risk factors for AKI after hepatic resection and whether intraoperative hypotension (IOH) was related to AKI. Methods Adult patients (≥ 18 years) undergoing liver resection between November 2017 and November 2019 at our hospital were retrospectively reviewed. AKI was defined as ≥50% increase in serum creatinine from baseline value within 48 h after surgery. IOH was defined as the lowest absolute mean arterial pressure (MAP) < 65 mmHg for more than 10 cumulative minutes during the surgery. Patients were divided into AKI group and non-AKI group, and were stratified by age ≥ 65 years. Results 796 patients who met our inclusion and exclusion criteria were analyzed. After multivariable regression analysis, the IOH (OR, 2.565; P = 0.009) and age ≥ 65 years (OR, 2.463; P = 0.008) were risk factors for AKI. The IOH (OR, 3.547; P = 0.012) and received red blood cell (OR, 3.032; P = 0.036) were risk factors of AKI in age ≥ 65 years patients. Conclusions The IOH and age ≥ 65 years were risk factors for postoperative AKI, and IOH was associated with AKI in age ≥ 65 years patients following liver resection.

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