Browsing by Author "Ozdemirkan, Aycan"

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Acute Respiratory Distress Syndrome in Solid Organ Transplant Recipients
(2016) Zeyneloglu, Pinar; Ozdemirkan, Aycan; Komurcu, Ozgur; Ulas, Aydin; Atar, Funda; Gedik, Ender; Pirat, Arash; https://orcid.org/0000-0002-7175-207X; AAH-7003-2019; ABI-2971-2020
Acute Respiratory Failure in Cardiac Transplant Recipients
(2015) Komurcu, Ozgur; Ozdemirkan, Aycan; Firat, Aynur Camkiran; Zeyneloglu, Pinar; Sezgin, Atilla; Pirat, Arash; 0000-0003-2312-9942; 0000-0003-1470-7501; 26640904; C-3736-2018; AAH-7003-2019
Objectives: This study sought to evaluate the incidence, risk factors, and outcomes of acute respiratory failure in cardiac transplant recipients. Materials and Methods: Cardiac transplant recipients >15 years of age and readmitted to the intensive care unit after cardiac transplant between 2005 and 2015 were included. Results: Thirty-nine patients were included in the final analyses. Patients with acute respiratory failure and without acute respiratory failure were compared. The most frequent causes of readmission were routine intensive care unit follow-up after endomyocardial biopsy, heart failure, sepsis, and pneumonia. Patients who were readmitted to the intensive care unit were further divided into 2 groups based on presence of acute respiratory failure. Patients' ages and body weights did not differ between groups. The groups were not different in terms of comorbidities. The admission sequential organ failure assessment scores were higher in patients with acute respiratory failure. Patients with acute respiratory failure were more likely to use bronchodilators and n-acetylcysteine before readmission. Mean peak inspiratory pressures were higher in patients in acute respiratory failure. Patients with acute respiratory failure developed sepsis more frequently and they were more likely to have hypotension. Patients with acute respiratory failure had higher values of serum creatinine before admission to intensive care unit and in the first day of intensive care unit. Patients with acute respiratory failure had more frequent bilateral opacities on chest radiographs and positive blood and urine cultures. Duration of intensive care unit and hospital stays were not statistically different between groups. Mortality in patients with acute respiratory failure was 76.5% compared with 0% in patients without acute respiratory failure. Conclusions: A significant number of cardiac transplant recipients were readmitted to the intensive care unit. Patients presenting with acute respiratory failure on readmission more frequently developed sepsis and hypotension, suggesting a poorer prognosis.
Anesthetic and Perioperative Management of Nontransplant Surgery in Patients After Liver Transplant
(2017) Ersoy, Zeynep; Ayhan, Asude; Ozdemirkan, Aycan; Polat, Gulsah Gulsi; Zeyneloglu, Pinar; Arslan, Gulnaz; Haberal, Mehmet; 0000-0003-0767-1088; 0000-0003-2312-9942; 0000-0002-3462-7632; 0000-0003-3299-6706; 0000-0001-8285-0372; 28260430; AAF-3066-2021; AAH-7003-2019; C-3736-2018; AAJ-8097-2021; AAJ-2066-2021
Objectives: We aimed to document the anesthetic management and metabolic, hemodynamic, and clinical outcomes of liver-graft recipients who subsequently undergo nontransplant surgical procedures. Materials and Methods: We retrospectively analyzed the data of 96 liver-graft recipients who underwent 144 nontransplant surgeries between October 1998 and April 2016 at Baskent University Hospital. Results: The median patient age at the time of nontransplant surgery was 32 years, and 35% were female (n = 33). The median time between transplant and nontransplant surgery was 1231 days. The most frequent types of nontransplant surgery were abdominal (22%), orthopedic (16%), and urologic (13%). Seventy patients had an American Society of Anesthesiologists status of 2 (49%); the status was 3 in 71 patients (49%) and 4 in 3 patients (2%). Of the 144 procedures, 23 were emergent (16%) and 48% were abdominal. General anesthesia was used in 69%, regional anesthesia in 19%, and sedoanalgesia in 11%. Twenty-five patients required intraoperative blood-product transfusion (17%). Intraoperative hemodynamic instability developed in 17% of patients, and hypoxemia developed in 2%. Eleven patients remained intubated at the end of surgery (8%). Of the 144 procedures, 19 (13%) required transfer to the intensive care unit, 108 (75%) transferred to the ward, and the remaining 17 (12%) were discharged on the same day. Eight patients developed respiratory failure (6%), 7 had renal dysfunction (5%), 4 had coagulation abnormalities (3%), and 10 had infectious complications (7%) in the early postoperative period. The median hospital stay was 4 days, and 5 patients (4%) developed rejection during hospitalization. Five patients died of respiratory or infectious complications (4%). Conclusions: Most liver-graft recipients who undergo nontransplant surgery are given general anesthesia, transferred to the ward after the procedure, and discharged without major complications. We suggest that orthotopic liver transplant recipients may undergo nontransplant surgery without any post operative graft dysfunction.
A Comparison of Echocardiography and the Pressure Recording Analytical Method (PRAM) for Predicting Fluid Responsiveness after Passive Leg Raising
(2021) Ozdemirkan, Aycan; Aitakhanoya, Manat; Gedik, Ender; Zeyneloglu, Pinar; Pirat, Arash; 0000-0002-7175-207X; ABI-2971-2020
Objective: This study aims to assess the agreement between the cardiac index (CI) measured by pressure recording analytical method (PRAM) and transthoracic echocardiography (TTE) before and after the passive leg raise (PLR) maneuver. Methods: This is a prospective observational study in critically ill patients who were monitored with MostcareUp/PRAM (Vygon, Vytech, Padova, Italy). Cardiac index (CI) values and percent changes in CI values in response to PLR were recorded by TTE and PRAM. Results: Data of a total of 25 patients were collected. The median CI values that were calculated by TTE before and after PLR were 2.5 (1.2-4.7) L/min/m(2) and 2.9 (1.4-5.6) L/min/m(2), respectively. The median CI values that were calculated by PRAM before and after PLR were 2.5 (1.5-4.8) L/min/m(2) and 2.6 (1.7-5.7) L/min/m(2), respectively. There was significant correlations between the measured CI values both by TTE and PRAM before and after PLR (r=0.635, p=0.001 and r=0.610, p=0.001, respectively). The median percent changes in CI with TTE and PRAM were -0.13 (-0.7-0.4) and -0.11 (-0.5-0.5), respectively. Sixteen patients were determined as FR by TTE (64%) and 13 patients were determined as FR by PRAM (52%). The Kappa test showed moderate agreement between TTE and PRAM for predicting fluid responsiveness (k=0.595; p=0.002). The mean biases between the CI values measured by TTE and PRAM before and after PLR were 0.04 +/- 0.77 L/min/m(2) and 0.22 +/- 0.88 L/min/m(2), respectively. Conclusion: This study showed a significant correlation for CI values measured by both methods. For predicting fluid responsiveness there was agreement between the two methods after PLR.
Early Postoperative Acute Kidney Injury Among Pediatric Liver Transplant Recipients
(2021) Sahinturk, Helin; Ozdemirkan, Aycan; Zeyneloglu, Pinar; Gedik, Ender; Pirat, Arash; Haberal, Mehmet; 0000-0003-0159-4771; 0000-0001-5324-0348; 0000-0002-3462-7632; 30880650; AAJ-1419-2021; AAD-8682-2022; AAJ-8097-2021
Objectives: Acute kidney injury after pediatric liver transplant is associated with increased morbidity and mortality. Here, we evaluated children with acute kidney injury early posttransplant using KDIGO criteria to determine incidence, risk factors, and clinical outcomes. Materials and Methods: In this retrospective cohort study, medical records of all patients < 16 years old who underwent liver transplant from April 2007 to April 2017 were reviewed. Results: Of 117 study patients, 69 (59%) were male and median age at transplant was 72 months (range, 12-120 mo). Forty children (34.2%) had postoperative acute kidney injury, with most having stage 1 disease (n = 21). Compared with children who had acute kidney injury versus those who did not, preoperative activated partial thromboplastin time (median 35.6 s [interquartile range, 32.4-42.8 s] vs 42.5 s [interquartile range, 35-49 s]; P = .007), intraoperative lactate levels at end of surgery (median 5.3 mmol/L [interquartile range, 3.3-8.6 mmol/L] vs 7.9 mmol/L [interquartile range, 4.3-11.2 mmol/L]; P = .044), and need for open abdomen (3% vs 15%; P = .024) were significantly higher. Logistic regression analysis revealed that preoperative high activated partial thromboplastin time (P = .02), intraoperative lactate levels at end of surgery (P = .02), and need for open abdomen (P = .03) were independent risk factors for acute kidney injury. Children who developed acute kidney injury had significantly longer intensive care unit stay (7.1 +/- 8.5 vs 4.4 +/- 5.4 days, P = .04) and mortality (12.8% vs 1.8%; P = .01). Conclusions: Early postoperative acute kidney injury occurred in 34.2% of pediatric liver transplant recipients, with patients having increased mortality risk. High preoperative activated partial thromboplastin time, high intraoperative end of surgery lactate levels, and need for open abdomen were shown to be associated with acute kidney injury after pediatric liver transplant.
The Effect of Extensively Drug-resistant Infections on Mortality in Surgical Intensive Care Patients
(2018) Sahinturk, Helin; Ozdemirkan, Aycan; Kilic, Fatma; Ozalp, Onur; Arslan, Hande; Zeyneoglu, Pinar; Pirat, Arash
Objective: The aim of the study was to assess the outcomes of intensive care unit acquired extensively drug-resistant (XDR) bacterial infections in a surgical patient cohort. Materials and Methods: The data of patients with XDR bacteria isolated at Baskent University Hospital, Anesthesia and Surgical Intensive Care Unit between January 2016 and December 2016 were reviewed retrospectively. Adult patients over 18 years of age who had undergone surgery within the first 24 hours and who developed intensive care unit infection 48 hours after admission to intensive care unit were included in the study. Results: All of the 341 patients who admitted to the surgical intensive care unit during the study period were underwent surgery within the first 24 hours. XDR bacterial infections were isolated in 30 out (9%) of these 341 patients. The mean APACHE II score was calculated as 18.5 +/- 5.3, and expected mean mortality rate of 35 +/- 17.1. The mean length of intensive care unit stay was 27.0 +/- 27.4 days, while the mean hospital stay was 49.0 +/- 34.3 days. The hospital mortality rate was found to be 57% (n=7). Conclusion: As a conclusion of our study, we found that XDR bacterial infections were common (9%) among intensive care surgical patients and their mortality rate was higher than their expected mortality rate according to their APACHE II scores calculated during intensive care unit admission (57% vs. 35%, respectively).
Effect of Graft Weight to Recipient Body Weight Ratio on Hemodynamic and Metabolic Parameters in Pediatric Liver Transplant: A Retrospective Analysis
(2017) Haberal, Mehmet; Ersoy, Zeynep; Kaplan, Serife; Ozdemirkan, Aycan; Torgay, Adnan; Arslan, Gulnaz; Pirat, Arash; 0000-0003-0767-1088; 0000-0002-6829-3300; 0000-0002-3462-7632; 28260433; AAF-3066-2021; AAJ-5221-2021; AAJ-8097-2021; AAH-7003-2019
Objectives: To analyze how graft-weight-to-body-weight ratio in pediatric liver transplant affects intraoperative and early postoperative hemodynamic and metabolic parameters. Materials and Methods: We reviewed data from 130 children who underwent liver transplant between 2005 and 2015. Recipients were divided into 2 groups: those with a graft weight to body weight ratio > 4% (large for size) and those with a ratio <= 4% (normal for size). Data included demographics, preoperative laboratory findings, intraoperative metabolic and hemodynamic parameters, and intensive care follow-up parameters. Results: Patients in the large-graft-for-size group (>4%) received more colloid solution (57.7 +/- 20.1 mL/kg vs 45.1 +/- 21.9 mL/kg; P = .08) and higher doses of furosemide (0.7 +/- 0.6 mg/kg vs 0.4 +/- 0.7 mg/kg; P = .018). They had lower mean pH (7.1 +/- 0.1 vs 7.2 +/- 0.1; P = .004) and PO2 (115.4 +/- 44.6 mm Hg vs 147.6 +/- 49.3 mm Hg; P = .004) values, higher blood glucose values (352.8 +/- 96.9 mg/dL vs 262.8 +/- 88.2 mg/dL; P < .001), and lower mean body temperature (34.8 +/- 0.7 degrees C vs 35.2 +/- 0.6 degrees C; P = .016) during the neohepatic phase. They received more blood transfusions during both the anhepatic (30.3 +/- 24.3 mL/kg vs 18.8 +/- 21.8 mL/kg; P = .013) and neohepatic (17.7 +/- 20.4 mL/kg vs 10.3 +/- 15.5 mL/kg; P = .031) phases and more fresh frozen plasma (13.6 +/- 17.6 mL/kg vs 6.2 +/- 10.2 mL/kg; P = .012) during the neohepatic phase. They also were more likely to be hypotensive (P < .05) and to receive norepinephrine infusion more often (44% vs 22%; P < .05) intra-operatively. More patients in this group were mechanically ventilated in the intensive care unit (56% vs 31%; P = .035). There were no significant differences between the groups in postoperative acute renal dysfunction, graft rejection or loss, infections, length of intensive care stay, and mortality (P > .05). Conclusions: High graft weight-to-body-weight ratio is associated with adverse metabolic and hemodynamic changes during the intraoperative and early postoperative periods. These results emphasize the importance of using an appropriately sized graft in liver transplant.
Immediate Tracheal Extubation After Pediatric Liver Transplantation
(2021) Sahinturk, Helin; Ozdemirkan, Aycan; Yilmaz, Olcay; Zeyneloglu, Pinar; Torgay, Adnan; Pirat, Arash; Haberal, Mehmet; 0000-0002-3462-7632; 0000-0003-0159-4771; 30346263; AAJ-8097-2021; AAJ-1419-2021
Objectives: We examined whether immediate tracheal extubation among pediatric liver transplant recipients was safe and feasible. Materials and Methods: We retrospectively analyzed medical records of pediatric liver transplant recipients at Baskent University Hospital from January 2012 to December 2017. We grouped children who were extubated in the operating room versus those extubated in the intensive care unit. Results: In our study group of 81 pediatric patients, median age was 4 years (range, 4 mo to 16 y) and 44 (54%) were male. Immediate tracheal extubation in the operating room was performed in 39 patients (48%). Children who remained intubated (n = 42) had more frequent massive hemorrhage (14% vs 0%; P = .015), received larger amounts of packed red blood cells (19.3 vs 10.2 mL/kg; P < .001), and had higher serum lactate levels (9.0 vs 6.9 mmol/L; P = .001) intraoperatively. All children with open abdomens postoperatively remained intubated (n = 7). Patients extubated in the operating room received less vasopressors (1 [3%] vs 12 [29%]; P = .002) and antibiotics (11 [28%] vs 22 [52%]; P = 0.041) and developed infections less frequently postoperatively (3.0 [8%] vs 15.0 [36%]; P = .003). Children extubated in the operating room had shorter mean stay in the intensive care unit (2.0 vs 4.5 days; P < .001). Hospital mortality was higher in children who remained intubated (12% vs 0%; P = .026). Conclusions: Immediate tracheal extubation was well tolerated in almost half of our patients and did not compromise their outcomes. Patients who remained intubated had longer intensive care unit stays and higher hospital mortalities. Therefore, we recommend immediate tracheal extubation in the operating room after pediatric liver transplant among those children without intraoperative requirements for massive blood transfusion, high-dose vasopressors, high serum lactate levels, and open abdomen.
The Incidence and Risk Factors of Acute Kidney Injury After Left Ventricular Assist Device Implantation
(2023) Atar, Funda; Sahinturk, Helin; Zeyneloglu, Pinar; Ozdemirkan, Aycan; 0000-0003-0159-4771; AAJ-1419-2021
Objective: Left ventricular assist device surgery (LVAD) associated acute kidney injury (AKI) is a severe complication of cardiac surgery with 15-45% incidence. The study evaluated AKI in the early postoperative period after LVAD surgery using the Kidney Disease: Improving Global Outcomes (KDIGO) criteria and compare patients with and without AKI to determine the incidence, risk factors, and clinical outcomes. Materials and Methods: In this retrospective cohort study, the medical records of all patients aged between 18 and 75 years who underwent LVAD implantation from January 2011 to December 2016 were reviewed. Patients were divided into two groups based on the development of AKI to analyze demographic features and perioperative variables. AKI was defined according to the KDIGO criteria. Results: Out of 57 patients, 10 (18%) were female, and the cohort's mean age was 44.6 +/- 16.1 years. Thirty-six patients (63%) developed AKI following LVAD implantation. Logistic regression analysis revealed the duration of cardiopulmonary bypass (CPB), mean arterial pressure, and cumulative fluid balance on the first postoperative day as independent risk factors for AKI [odds ratio (OR): 1.013, confidence interval (CI) 95% 1.000-1.025, p=0.05; OR: 0.929, CI 95% 0.873-0.989, p=0.02; OR: 1.001, CI 95% 1.000-1.001, p=0.04 respectively]. Hospital mortality (58% vs. 24%, p=0.01) and 30-day mortality (39% vs. 5%, p=0.01) were significantly higher in patients who had AKI. Conclusion: Risk factors for the occurrence of AKI include a longer duration of CPB, lower mean arterial pressures, and higher cumulative fluid balance on the first postoperative day. Therefore, AKI is one of the most important causes of morbidity and mortality after LVAD.
Incidence of Acute Kidney Injury Following Liver Transplantation
(2018) Ersoy, Zeynep; Ozdemirkan, Aycan; Zeyneloglu, Pinar; Pirat, Arash; Torgay, Adnan; Haberal, Mehmet; 0000-0003-0767-1088; 0000-0002-6829-3300; 0000-0002-3462-7632; AAF-3066-2021; AAH-7003-2019; AAJ-5221-2021; AAJ-8097-2021
Multivariable haemodynamic approach to predict the fluid challenge response A multicentre cohort study
(2021) Messina, Antonio; Romano, Salvatore M.; Ozdemirkan, Aycan; Persona, Paolo; Tarquini, Riccardo; Cammarota, Gianmaria; Romagnoli, Stefano; Della Corte, Francesco; Bennett, Victoria; Monge Garcia, Manuel I.; 32833857; AAH-7003-2019
BACKGROUND Beat-to-beat stroke volume (SV) results from the interplay between left ventricular function and arterial load. Fluid challenge induces time-dependent responses in cardiac performance and peripheral vascular and capillary characteristics. OBJECTIVE To assess whether analysis of the determinants of the haemodynamic response during fluid challenge can predict the final response at 10 and 30 min. DESIGN Observational multicentric cohort study. SETTING Three university ICUs. PATIENTS 85 ICU patients with acute circulatory failure diagnosed within the first 48 h of admission. INTERVENTION(S) The fluid challenge consisted of 500 ml of Ringer's solution infused over 10 min. A SV index increase at least 10% indicated fluid responsiveness. MAIN OUTCOME MEASURES The SV, pulse pressure variation (PPV), arterial elastance, the systolic-dicrotic pressure difference (SAP-P-dic) and cardiac cycle efficiency (CCE) were measured at baseline, 1, 2, 3, 4, 5, 10, 15 and 30 min after the start of the fluid challenge. All haemodynamic data were submitted to a univariable logistic regression model and a multivariable analysis was then performed using the significant variables given by univariable analysis. RESULTS The multivariable model including baseline PPV, and the changes of arterial elastance at 1 min and of the CCE and SAP-P-dic at 5 min when compared with their baseline values, correctly classified 80.5% of responders and 90.7% of nonresponders at 10 min. For the response 30 min after starting the fluid challenge, the model, including the changes of PPV, CCE, SAP-P-dic at 5 min and of arterial elastance at 10 min compared with their baseline values, correctly identified 93.3% of responders and 91.4% of nonresponders. CONCLUSION In a selection of mixed ICU patients, a statistical model based on a multivariable analysis of the changes of PPV, CCE, arterial elastance and SAP-P-dic, with respect to baseline values, reliably predicts both the early and the late response to a standardised fluid challenge.
Percutaneous Dilational Tracheotomy in Solid-Organ Transplant Recipients
(2015) Ozdemirkan, Aycan; Ersoy, Zeynep; Zeyneloglu, Pinar; Gedik, Ender; Pirat, Arash; Haberal, Mehmet; 0000-0003-0767-1088; 0000-0002-3462-7632; 0000-0003-2312-9942; 0000-0002-7175-207X; 26640911; AAF-3066-2021; AAH-7003-2019; AAJ-8097-2021; C-3736-2018; ABI-2971-2020
Objectives: Solid-organ transplant recipients may require percutaneous dilational tracheotomy because of prolonged mechanical ventilation or airway issues, but data regarding its safety and effectiveness in solid-organ transplant recipients are scarce. Here, we evaluated the safety, effectiveness, and benefits in terms of lung mechanics, complications, and patient comfort of percutaneous dilational tracheotomy in solid-organ transplant recipients. Materials and Methods: Medical records from 31 solid-organ transplant recipients (median age of 41.0 years [interquartile range, 18.0-53.0 y]) who underwent percutaneous dilational tracheotomy at our hospital between January 2010 and March 2015 were analyzed, including primary diagnosis, comorbidities, duration of orotracheal intubation and mechanical ventilation, length of intensive care unit and hospital stays, the time interval between transplant to percutaneous dilational tracheotomy, Acute Physiology and Chronic Health Evaluation II score, tracheotomy-related complications, and pulmonary compliance and ratio of partial pressure of arterial oxygen to fraction of inspired oxygen. Results: The median Acute Physiology and Chronic Health Evaluation II score on admission was 24.0 (interquartile range, 18.0-29.0). The median interval from transplant to percutaneous dilational tracheotomy was 105.5 days (interquartile range, 13.0-2165.0 d). The only major complication noted was left-sided pneumothorax in 1 patient. There were no significant differences in ratio of partial pressure of arterial oxygen to fraction of inspired oxygen before and after procedure (170.0 [inter quartile range, 102.2-302.0] vs 210.0 [interquartile range, 178.5-345.5]; P=.052). However, pulmonary compliance results preprocedure and postprocedure were significantly different (0.020 L/cm H2O [interquartile range, 0.015-0.030 L/cm H2O] vs 0.030 L/cm H2O [interquartile range, 0.020-0.041 L/cm H2O); P=.001]). Need for sedation significantly decreased after tracheotomy (from 17 patients [54.8%] to 8 patients [25.8%]; P=.004]). Conclusions: Percutaneous dilational tracheotomy with bronchoscopic guidance is an efficacious and safe technique for maintaining airways in solid-organ transplant recipients who require prolonged mechanical ventilation, resulting in possible improvements in ventilatory mechanics and patient comfort.
Perioperative Characteristics of Siblings Undergoing Liver or Kidney Transplant
(2015) Ersoy, Zeynep; Ozdemirkan, Aycan; Pirat, Arash; Torgay, Adnan; Arslan, Gulnaz; Haberal, Mehmet; 0000-0002-3462-7632; 0000-0002-6829-3300; 0000-0003-0767-1088; 26640926; AAJ-8097-2021; AAH-7003-2019; AAJ-5221-2021; AAF-3066-2021
Objectives: Reasons for chronic liver and kidney failure may vary; sometimes more than 1 family member may be affected, and may require a transplant. The aim of this study was to examine the similarities or differences between the peri operative characteristics of siblings undergoing liver or kidney transplant. Materials and Methods: The medical records of 6 pairs of siblings who underwent liver transplant and 4 pairs of siblings who underwent kidney transplant at Baskent University Hospital between 1989 and 2014 were retrospectively analyzed. Collected data included demographic features; comorbidities; reasons for liver and kidney failure; perioperative laboratory values; intraoperative hemodynamic parameters; use and volume of crystalloids, colloids, blood products, cell saver system, and albumin; duration of anesthesia; urine output; and postoperative follow-up data. Results: The mean age of the 6 sibling pairs who underwent liver transplant was 16.3 +/- 12.2 years. All 12 patients had Child-Pugh grade B cirrhosis, with mean disease duration of 7.8 +/- 3.9 years. There were no significant differences between siblings with respect to intraoperative blood product transfusion, crystalloid and colloid fluid replacements, hypotension frequency, blood gas analyses, urinary output, duration of anhepatic phase, inotropic agent administration, post operative laboratory values, need for mechanical ventilation and vasopressors, occurrence of acute renal failure and infections, and duration intensive care unit stay (P>.05). The mean age of the 4 sibling pairs who underwent kidney transplant was 21.3 +/- 6.4 years, with mean duration of renal insufficiency of 2.2 +/- 1.6 years. There were no significant differences between siblings with respect to intraoperative crystalloid and colloid fluid administration, duration of anesthesia, intra operative mannitol and furosemide administration, and postoperative laboratory values (P>.05). Conslusions: In conclusion, the 6 sibling pairs who underwent liver transplant and 4 sibling pairs who underwent kidney transplant in our cohort had similar perioperative characteristics.
Perioperative Venoarterial Extracorporeal Membrane Oxygenation Support During Heart Transplant
(2017) Gedik, Ender; Atar, Funda; Ozdemirkan, Aycan; Firat, Aynur Camkiran; Zeyneloglu, Pinar; Sezgin, Atilla; Pirat, Arash; 0000-0002-7175-207X; 0000-0003-2312-9942; 0000-0003-1470-7501; 28260473; AAH-7003-2019; ABI-2971-2020; C-3736-2018
Objectives: Heart transplant is the only definitive treatment of end-stage heart failure. Venoarterial extracorporeal membrane oxygenation may be used as a bridge to heart transplant. This technique may be used after heart transplant for conditions refractory to medical treatment like primary graft failure. Previously, we reported our experience with patients who received extracorporeal support as a bridge to emergency heart transplant. In this study, we present our perioperative experience with heart transplants in which extracorporeal support was used. Materials and Methods: We retrospectively screened the data of 31 patients who were seen at our center between January 2014 and June 2016. We screened for patients who were admitted to the intensive care unit before transplant and who required venoarterial extracorporeal membrane oxygenation for circulatory support and postoperative patients who required extracorporeal support. Patient demographics and characteristics, clinical data, and extracorporeal support data were collected from our electronic database and patient medical records. Results: There were 14 patients who required peri operative extracorporeal support. Preoperative sup port was performed in 3 patients before transplant, and postoperative support was performed in 11 patients after transplant. The mean age was 37.7 years in patients within the preoperative group and 29.7 years in patients within the postoperative group. One patient with preoperative support and 5 with postoperative support were pediatric patients. The main indication for transplant was dilated cardiomyopathy in both groups (100% and 63.7%). Overall mortality rates were 33% in the preoperative group and 63.7% in the postoperative group. Conclusions: For patients on heart transplant wait lists who are worsening despite optimal medical therapy, venoarterial extracorporeal membrane oxygenation support is a safe and viable last resort. In addition, extracorporeal support can be used during the posttransplant period as salvage therapy in heart recipients with hemodynamic deterioration. In our experience, preoperative extracorporeal support had lower mortality rates compared with postoperative support.
PiCCO Monitoring During Liver Transplantation for Pediatric Patients
(2018) Ersoy, Zeynep; Ozdemirkan, Aycan; Zeyneloglu, Pinar; Pirat, Arash; Torgay, Adnan; Kayhan, Zeynep; Haberal, Mehmet; 0000-0003-0767-1088; 0000-0002-6829-3300; 0000-0003-0579-1115; 0000-0002-3462-7632; AAF-3066-2021; AAH-7003-2019; AAJ-5221-2021; AAJ-4623-2021; AAJ-8097-2021
Posterior Reversible Encephalopathy Syndrome After Solid Organ Transplantation
(2016) Ulas, Aydin; Ozdemirkan, Aycan; Can, Ufuk; Zeyneloglu, Pinar; Pirat, Arash; https://orcid.org/0000-0001-8689-417X; AAH-7003-2019; AAJ-2999-2021
Renal Replacement Therapy for Renal Transplant Recipients During ICU Stay
(2018) Gedik, Ender; Sahinturk, Helin; Ozdemirkan, Aycan; Zeyneloglu, Pinar; Torgay, Adnan; Pirat, Arash; Haberal, Mehmet; 0000-0002-7175-207X; 0000-0003-0159-4771; 0000-0002-6829-3300; 0000-0002-3462-7632; ABI-2971-2020; AAJ-1419-2021; AAH-7003-2019; AAJ-5221-2021; AAJ-8097-2021
Risk Factors for Postoperative Prolonged Mechanical Ventilation After Pediatric Liver Transplantation
(2021) Sahinturk, Helin; Ozdemirkan, Aycan; Zeyneloglu, Pinar; Torgay, Adnan; Pirat, Arash; Haberal, Mehmet; 0000-0002-3462-7632; 0000-0003-0159-4771; 31084587; AAJ-8097-2021; AAJ-1419-2021
Objectives: Duration of postoperative mechanical ventilation after pediatric liver transplant may influence pulmonary functions, and postoperative prolonged mechanical ventilation is associated with higher morbidity and mortality. Here, we determined its incidence and risk factors after pediatric liver transplant at our center. Materials and Methods: We retrospectively analyzed the records of 121 children who underwent liver transplant between April 2007 and April 2017 ( 305 total liver transplant procedures were performed during this period). Prolonged mechanical ventilation was defined as postoperative tracheal extubation after 24 hours. Results: Mean age at transplant was 6.2 +/- 5.4 years and 71/121 children (58.7%) were male. Immediate tracheal extubation was achieved in 68 children (56.2%). Postoperative prolonged mechanical ventilation was needed in 12 children (9.9%), with mean extubation time of 78.0 +/- 83.4 hours. Reintubation was required in 13.4%. Logistic regression analysis revealed that presence of preoperative hepatic encephalopathy (odds ratio of 0.130; 95% confidence interval, 0.027-0.615; P =.01), high aspartate amino transferase levels (odds ratio of 1.001; 95% confidence interval, 1.000-1.002; P =.02), intraoperative usage of more packed red blood cells (odds ratio of 1.001; 95% confidence interval, 1.000-1.002; P =.04), and longer surgery duration (odds ratio of 0.723; 95% confidence interval, 0.555-0.940, P =.01) were independent risk factors for postoperative prolonged mechanical ventilation. Although mean length of intensive care unit stay was significantly longer (12.6 +/- 13.6 vs 6.0 +/- 0.6 days; P =.001), mortality was similar in children with and without postoperative prolonged mechanical ventilation. Conclusions: Our results indicate that postoperative prolonged mechanical ventilation was needed in 9.9% of our children. Predictors of postoperative prolonged mechanical ventilation after pediatric liver transplant at our center were preoperative presence of hepatic encephalopathy, high aspartate amino transferase levels, intraoperative usage of more packed red blood cells, and longer surgery duration.