Creatinine Reduction Ratio is a Prognostic Factor for Acute Kidney Injury Following Cardiac Surgery with Cardio Pulmonary Bypass: A Single Center Retrospective Cohort Study.

Background: Acute kidney injury (AKI) after cardiac surgery is common complication, and it is known as risk of death. In the previous study, we reported creatinine reduction ratio (CRR) can be useful as a prognostic factor of AKI. Primary outcome of this study was determination of predictor of AKI after surgery with using perioperative information. Secondary outcome was the reliability of CRR for short and long term outcome among the different nation.Methods: We retrospectively collected cardiac surgical patients with cardiopulmonary bypass from electrical health record. Patients were excluded with insufficient data. AKI was defined by the AKIN and RIFLE criteria, (1) increment of creatinine≧ 0.3mg/dl (2); increment of creatinine≧ 150%. Patients were divided by AKI and non-AKI group. We analyzed two group about the preoperative patients’ data and operative information. CRR was calculated as follows: (preoperative creatinine-postoperative creatinine)/preoperative creatinine. Results: 225 patients data were collected from electrical health record, and analysed. The prognostic factor of AKI-CS was surgery time, CPB time, aorta clamp time, platelet transfusion, and CRR < 20%. In the multivariable logistic analysis, CRR was an independent predictor of AKI. (adjusted odds ratio 0.90[0.87-0.93] p<0.001) However, there were not significant difference in CRR about the rate of new onset of chronic kidney disease (CKD). Conclusions: After cardiac surgery with cardiopulmonary bypass, the CRR has a good diagnostic power for predicting perioperative AKI. However, we cannot use it as a prognostic factor for long term period.

A novel clinical nomogram for predicting 3-month unfavorable outcomes of stroke patients treated with mechanical thrombectomy

Background: Mechanical thrombectomy (MT) is an effective treatment for large-vessel occlusion in acute ischemic stroke, however, only some revascularized patients have a good prognosis. For stroke patients undergoing MT, predicting the risk of unfavorable outcomes and adjusting the treatment strategies accordingly can greatly improve prognosis. Therefore, we aimed to develop and validate a nomogram that can predict 3-month unfavorable outcomes for individual stroke patient treated with MT. Methods: We analyzed 238 patients with acute ischemic stroke who underwent MT from January 2018 to October 2020. The primary outcome was a 3-month unfavorable outcome, assessed using the modified Rankin Scale (mRS), 3-6. A nomogram was generated based on a multivariable logistic model. We used the area under the receiver-operating characteristic curve to evaluate the discriminative performance and used the calibration curve and Spiegelhalter’s Z-test to assess the calibration performance of the risk prediction model. Results: After multivariable logistic regression, six variables (gender, bridging therapy, postoperative mTICI, stroke-associated pneumonia, preoperative creatinine and Na) remained independent predictors of 3-month unfavorable outcomes in stroke patients treated with MT, thus forming a nomogram. The area under the nomogram curve was 0.848 with good calibration performance (P = 0.946 for the Spiegelhalter’s Z-test). Conclusions: A novel nomogram consisting of gender, bridging therapy, postoperative mTICI, stroke-associated pneumonia, preoperative creatinine and Na can predict the 3-month unfavorable outcomes in stroke patients treated with MT.

Acute and long-term kidney function after parathyroidectomy for primary hyperparathyroidism

Background In kidney transplant patients, parathyroidectomy is associated with an acute decrease in renal function. Acute and chronic effects of parathyroidectomy on renal function have not been extensively studied in primary hyperparathyroidism (PHPT). Methods This retrospective cohort study included 494 patients undergoing parathyroidectomy for PHPT. Acute renal changes were evaluated daily until day 4 post-parathyroidectomy and were stratified according to acute kidney injury (AKI) criteria. Biochemical assessment included serum creatinine, total and ionized calcium, parathyroid hormone (PTH), and 25-hydroxyvitamin D (25OHD). The estimated glomerular filtration rate (eGFR) was calculated using the CKD-EPI equation. We compared preoperative and postoperative renal function up to 5 years of follow-up. Results A total of 391 (79.1%) patients were female, and 422 (85.4%) were non-African American. The median age was 58 years old. The median (first and third quartiles) preoperative serum creatinine, PTH and total calcium levels were 0.81 mg/dL (0.68–1.01), 154.5 pg/mL (106–238.5), and 10.9 mg/dL (10.3–11.5), respectively. The median (first and third quartiles) preoperative eGFR was 86 mL/min/1.73 m2 (65–101.3). After surgery, the median acute decrease in the eGFR was 21 mL/min/1.73 m2 (p<0.0001). Acutely, 41.1% of patients developed stage 1 AKI, 5.9% developed stage 2 AKI, and 1.8% developed stage 3 AKI. The acute eGFR decrease (%) was correlated with age and PTH, calcium and preoperative creatinine levels in univariate analysis. Multivariate analysis showed that the acute change was related to age and preoperative values of ionized calcium, phosphorus and creatinine. The change at 12 months was related to sex, preoperative creatinine and 25OHD. Permanent reduction in the eGFR occurred in 60.7% of patients after an acute episode. Conclusion There was significant acute impairment in renal function after parathyroidectomy for PHPT, and almost half of the patients met the criteria for AKI. Significant eGFR recovery was observed during the first month after surgery, but a small permanent reduction may occur. Patients treated for PHPT seemed to present with prominent renal dysfunction compared to patients who underwent thyroidectomy.

Acute Kidney Injury Following Pediatric Liver Transplant

Objective: To determine the incidence, severity, and risk factors of postoperative acute kidney injury in pediatric liver transplant patients with and without inborn errors of metabolism. Design: Retrospective cohort study. Setting: Single-center PICU. Patients: All children less than or equal to 18 years old who received a liver transplant between January 2009 and July 2019. Interventions: None. Measurements and Main Results: Following exclusion criteria there were 92 transplant encounters. After excluding patients who received combined kidney-liver transplantation, acute kidney injury occurred in 57% of patients (N = 49), with 25.6% (N = 22) stage 1, 15.1% (N = 13) stage 2, and 16.3% (N = 14) stage 3. In an adjusted analysis, metabolic indication for transplant was not significantly associated with presence of acute kidney injury (p = 0.45). For the subset of patients without inborn errors of metabolism, the odds of having acute kidney injury was 1.50 (95% CI: 1.00-2.26) for each 1-unit increase in preoperative INR after adjusting for the covariates of age, preoperative albumin, CMV status of donor, and preoperative creatinine. In the full cohort, as well as the sample of children without inborn errors of metabolism, presence of acute kidney injury was associated with longer total hospital stay as well as number of ICU days. Conclusions: Acute kidney injury in the early postoperative period is common in pediatric liver transplant patients (57%), 31.4% of whom had severe disease. In patients without inborn errors of metabolism, each unit increase in preoperative INR suggests a higher risk of acute kidney injury after adjusting for covariates including preoperative creatinine. This finding suggests an association between the severity of preoperative synthetic liver function and the risk of developing postoperative acute kidney injury which requires further investigation.

Prognostic Factors for Bile Leak and Long-Term Survival in 23 Patients with Klatskin Type III Tumors

Objective: Surgical resection of hilar cholangiocarcinoma carries significant morbidity and mortality, particularly if postoperative bile leak occurs. Prognostic factors and scoring tools have been described for overall morbidity and mortality but none are specific for postoperative bile leak. In this study, we investigate the prognostic utility of various factors in predicting overall morbidity, mortality and risk of biliary leak in Bismuth Type III tumors with the hopes of developing a scoring tool in future research. Materials and Methods: A retrospective sample of 23 patients with Bismuth Type III tumors exclusively who underwent surgery between 2010 and 2017 were selected for this study. Demographic, surgical, pathologic and biochemical data were collected from the patients’ medical records. Results: 11 patients underwent a right hepatectomy for type IIIa tumors and 10 patients underwent a left hepatectomy for type IIIb tumors. 2 patients were lost to follow up and were excluded. R0 resection was achieved in 20 patients. Overall survival at 1, 3 and 5 years was 78.3%, 61.9% and 38.1%, respectively. A BMI >24kg/m2 was associated with a worse prognosis, increased overall morbidity and decreased survival at 1, 3 and 5 years (p<0.05). A preoperative creatinine >0.74 was associated with decreased 5-year survival (p<0.05). Conclusion: A BMI >24kg/m2 and a preoperative creatinine >0.74 are associated with a poor prognosis in Bismuth Type III Klatskin tumors. Furthermore, Age, sex, preoperative hemoglobin, tumor size, use of CUSA and type IIIb tumors demonstrate a borderline significant association with the occurrence of postoperative bile leak.

ACUTE KIDNEY INJURY FOLLOWING SURGERY FOR HIP FRACTURE

ABSTRACT Objective: An observational study was carried out to determine the rate of acute kidney injury (AKI) following surgery for hip fracture at our institution and to look for factors associated with AKI. Methods: Preoperative creatinine values were compared to post-operative results for all patients who underwent surgery for hip fracture at our institution between 1st January 2015 and 30th September 2016. AKI was defined as an increase in postoperative creatinine, greater than or equal to 1.5 times the preoperative value within 7 days. Chi-squared test and Student’s t-test were used to look for factors associated with AKI. Results: Out of 500 patients, 96 developed an AKI (19.2%). Patients with chronic kidney disease (CKD) were more likely to develop AKI (30.8%) that those without it (17.2%, p = 0.018). Similarly, patients with 2 or more comorbidities were more likely to develop AKI (22.0%) than those without it (12.4%, p = 0.009). No statistically significant association was observed between type of surgery and AKI. Conclusion: A large proportion of patients following surgery for hip fracture developed AKI. Patients with CKD and the presence of 2 or more comorbidities had significantly higher rates of AKI. Level III evidence, Retrospective comparative study.

Predictors of complications associated with extracorporeal membrane oxygenation

ABSTRACT Objectives: to identify in the literature, the predictors of ECMO complications in adult patients. Methods: integrative review of literature, including articles in Portuguese, English and Spanish published from 2014 to 2018 in five databases. Included articles which analyzed the predictive factors of ECMO complications in adult patients using multivariate analysis. Results: a total of 1629 articles were identified, of which 19 were included. Nineteen predictors were identified for neurological complications (e.g., post-ECMO hypoglycemia), seven for bleeding complications (e.g., fungal pneumonia), four for infections complications (e.g., preoperative creatinine level), three for kidney complications (e.g., the length of ICU stay> 20 days) and a combination of factors for mechanical complications (e.g., median flow). Conclusions: different predictors were identified to ECMO complications. The knowledge of these predictors enables the individualized targeting of preventive interventions by multidisciplinary team for modifiable factors, as well as intensification of monitoring for early recognition of non-modifiable factors.

Trifecta Outcomes in Open, Laparoscopy or Robotic Partial Nephrectomy: Does the Surgical Approach Matter?

This retrospective study evaluated perioperative outcomes of open partial nephrectomy (OPN), laparoscopic partial nephrectomy (LPN), and robot-assisted partial nephrectomy (RAPN) and identified predictive factors of Trifecta achievement for renal tumors that underwent partial nephrectomy (PN) in a single institutional cohort. The study involved patients who underwent PN from January 2011 to July 2018. Trifecta was defined as absence of perioperative complications, no positive surgical margins, and ischemia time <30 min. Fifty-five PN procedures were reviewed: 28 OPN, 14 LPN, and 13 RAPN. OPN, LPN and RAPN had similar median tumor size (5.75, 5.25, and 5 cm), nephrometry score (7, 6, and 6), and preoperative creatinine (1.09, 1.1, and 1.1 mg/dl, respectively). Blood loss was higher for OPN (550 ml) than for LPN (400 ml) and RAPN (300 ml), P = 0.042. Drain was removed after 6 days in OPN which was higher than LPN and RAPN (4.5 and 4 days, respectively), P = 0.008. OPN, LPN, and RAPN had similar median operative time (190, 180, and 180 min, respectively), P = 0.438. Median postoperative stay for OPN, LPN, and RAPN was 5, 6.5, and 10 days, respectively. Trifecta outcomes of 73.1%, 64.3%, and 61.53% were achieved in OPN, LPN, and RAPN, respectively, P = 0.730. It was concluded that Trifecta outcomes had no significant difference among OPN, LPN, and RAPN. LPN can produce as good results as RAPN. Keeping in mind the cost-effectiveness, LPN holds an important position in developing countries where expenditure by patient is a major factor.