Browsing by Author "Pirat, Arash"

Now showing 1 - 20 of 38

Accuracy of Continuous Noninvasive Arterial Pressure Monitoring in Living-Liver Donors During Transplantation
(2015) Araz, Coskun; Zeyneloglu, Pinar; Pirat, Arash; Veziroglu, Nukhet; Firat, Aynur Camkiran; Arslan, Gulnaz; 0000-0003-2312-9942; 0000-0002-4927-6660; 0000-0003-1470-7501; 25894178; C-3736-2018; AAJ-4576-2021
Objectives: Hemodynamic monitoring is vital during liver transplant surgeries because distinct hemodynamic changes are expected. The continuous noninvasive arterial pressure (CNAP) monitor is a noninvasive device for continuous arterial pressure measurement by a tonometric method. This study compared continuous noninvasive arterial pressure monitoring with invasive direct arterial pressure monitoring in living-liver donors during transplant. Materials and Methods: There were 40 patients analyzed while undergoing hepatic lobectomy for liver transplant. Invasive pressure monitoring was established at the radial artery and continuous noninvasive arterial pressure monitoring using a finger sensor was recorded simultaneously from the contralateral arm. Systolic, diastolic, and mean arterial pressures from the 2 methods were compared. Correlation between the 2 methods was calculated. Results: A total of 5433 simultaneous measurements were obtained. For systolic arterial blood pressure, 55% continuous noninvasive arterial pressure measurements were within 10% direct arterial measurement; the correlation was 0.479, continuous noninvasive arterial pressure bias was -0.3 mm Hg, and limits of agreement were 32.0 mm Hg. For diastolic arterial blood pressure, 50% continuous noninvasive arterial pressure measurements were within 10% direct arterial measurement; the correlation was 0.630, continuous noninvasive arterial pressure bias was -0.4 mm Hg, and limits of agreement were 21.1 mm Hg. For mean arterial blood pressure, 60% continuous noninvasive arterial pressure measurements were within 10% direct arterial measurement; the correlation was 0.692, continuous noninvasive arterial pressure bias was +0.4 mm Hg, and limits of agreement were 20.8 mm Hg. Conclusions: The 2 monitoring techniques did not show acceptable agreement. Our results suggest that continuous noninvasive arterial pressure monitoring is not equivalent to invasive arterial pressure monitoring in donors during living-donor liver transplant.
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 Management in Pediatric Orthotopic Liver Transplant For Fulminant Hepatic Failure and End-stage Liver Disease
(2014) Camkiran, Aynur; Araz, Coskun; Balli, Sevgi Seyhan; Torgay, Adnan; Moray, Gokhan; Pirat, Arash; Arslan, Gulnaz; Haberal, Mehmet; https://orcid.org/0000-0003-1470-7501; https://orcid.org/0000-0002-4927-6660; https://orcid.org/0000-0002-6829-3300; https://orcid.org/0000-0003-2498-7287; https://orcid.org/0000-0002-3462-7632; 24635805; AAJ-4576-2021; AAJ-5221-2021; AAE-1041-2021; AAJ-8097-2021
Objectives: We assessed the anesthetic management and short-term morbidity and mortality in pediatrics patients who underwent an orthotopic liver transplant for fulminant hepatic failure or end-stage liver disease in a university hospital. Material and Methods: We retrospectively analyzed the records of children who underwent orthotopic liver transplant from May 2002 to May 2012. Patients were categorized into 2 groups: group fulminant hepatic failure (n=22) and group end-stage liver disease (n=19). Perioperative data related to anesthetic management and intra-operative events were collected along with information related to postoperative course and survival to hospital discharge. Results: Mean age and weight for groups fulminant hepatic failure and end-stage liver disease were 8.6 +/- 2.7 years and 10.8 +/- 3.8 years (P= .04) and 29.2 +/- 11.9 kg and 33.7 +/- 16.9 kg (P= .46). There were no differences between the groups regarding length of anhepatic phase (65 +/- 21 min vs 73 +/- 18 min, P= .13) and operation time (9.1 +/- 1.6 h vs 9.5 +/- 1.8 h, P= .23). When compared with the patients in group fulminant hepatic failure, those in group end-stage liver disease more commonly had a Glasgow Coma score of 7 or less (32% vs 6%, P= .04). Compared with patients in group fulminant hepatic failure, those in group end-stage liver disease were more frequently extubated in the operating room (31.8% versus 89.5% P <.001). Postoperative duration of mechanical ventilation (2.78 +/- 4.02 d vs 2.85 +/- 10.21 d, P = .05), and the mortality rates at 1 year after orthotopic liver transplant (7.3% vs 0%, P = .09) were similar between the groups. Conclusions: During pediatric orthotopic liver transplant, those children with fulminant hepatic failure require more intraoperative fluids and more frequent perioperative mechanical ventilation than those with end-stage liver disease.
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.
Distal Limb Reperfusion During Percutaneous Femoral Arterial Cannulation for Veno-Arterial Extracorporeal Membrane Oxygenation in an Adult Patient
(2019) Firat, Aynur Camkiran; Sezgin, Atilla; Pirat, Arash; 31276115
Ischemia and compartment syndrome may be seen, especially in the distal limb, after femora-femoral cannulation for extracorporeal membrane oxygenation (ECMO). Several techniques have been used to decrease the rate of complications. Arterial hypoxemia may be prevented by reperfusion with distal limb. Prophylactic superficial femoral artery cannulation results in ease in operation and prevents perfusion. In the present case, we present prophylactic superficial femoral artery cannulation for limb reperfusion.
Early Postoperative Acute Kidney Injury Among Heart Transplant Recipients: Incidence, Risk Factors and Impact on Clinical Consequences
(2018) Aliyev, Ali; Ayhan, Asude; Zeyneloglu, Pinar; Pirat, Arash; Sezgin, Atilla; Kayhan, Zeynep; 000-0003-3299-6706; 0000-0003-0579-1115; AAE-8052-2019; AAJ-2066-2021; AAJ-4623-2021
Early Postoperative Acute Kidney Injury Among Pediatric Liver Transplant Recipients
(2018) Sahinturk, Helin; Kundakci, Aycan; Zeyneloglu, Pinar; Gedik, Ender; Pirat, Arash; Haberal, Mehmet; 0000-0003-0159-4771; 0000-0002-7175-207X; 0000-0002-3462-7632; AAJ-1419-2021; AAH-7003-2019; ABI-2971-2020; AAJ-8097-2021
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.
The Effect of Positive End Expiratory Pressure on Right Ventricular Functions in Coronary Artery Bypass Graft Surgery
(2017) Turker, Melis; Firat, Aynur Camkiran; Pirat, Bahar; Sezgin, Atilla; Pirat, Arash; https://orcid.org/0000-0003-4576-8630; AAI-8897-2021
Background: This study aims to investigate the effect of positive end-expiratory pressure on the right ventricular functions by speckle tracking method in patients undergoing coronary artery bypass grafting. Methods: This prospective study included a total of 20 patients (17 males, 3 females; mean age 59.7 +/- 10.5 years; range 42 to 77 years) who underwent coronary artery bypass grafting between May 2013 and September 2013. After initiation of 5 cmH(2)O positive end-expiratory pressure during mechanical ventilation before sternotomy, 10 and 20 cmH(2)O of positive end-expiratory pressure were applied in five-min intervals, respectively. Four-chamber and two-chamber views of the right ventricle were recorded at each pressure level using transesophageal echocardiography. The right ventricle diameter and velocity, longitudinal strain and strain rate, and right ventricle fractional area change were calculated. Results: Intraoperative systolic, diastolic, and mean blood pressures and mean heart rate were similar at the three positive end-expiratory pressure levels. The mean right ventricle strain value was significantly lower at 20 cmH(2)O pressure (p<0.001 for both). The mean strain rate was significantly lower at 20 cmH(2)O pressure, compared to 5 cmH(2)O pressure (p=0.03). The right ventricle velocity was found to significantly decreased with increasing positive end-expiratory pressure (p<0.05). The mean right ventricle fractional area change was similar at 5 and 10 cmH(2)O pressures (p=0.063), while it was significantly lower at 20 cmH(2)O pressure (p=0.001). The mean right ventricle diameter decreased with increasing positive end-expiratory pressure, while this decrease was significant at 20 cmH(2)O pressure (p=0.01). Conclusion: Our study results show that 5, 10, and 20 cmH(2)O positive end-expiratory pressures does not significantly change hemodynamic data in patients undergoing coronary artery bypass grafting with normal right ventricular functions; however, 20 cmH(2)O positive end-expiratory pressure leads to decreased right ventricular functions, as assessed by transesophageal echocardiography.
Extracorporeal Membrane Oxygenation After Liver Transplantation in A Patient with Hepatopulmonary Syndrome and Refractory Hypoxemia
(2016) Komurcu, Ozgur; Pirat, Arash; Zeyneloglu, Pinar; Ulas, Aydin; Moray, Gokhan; Haberal, Mehmet; https://orcid.org/0000-0003-2498-7287; https://orcid.org/0000-0002-3462-7632; AAE-1041-2021; AAJ-8097-2021
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.
Incidence and Patient Outcomes in Renal Replacement Therapy After Orthotopic Liver Transplant
(2017) Ayhan, Asude; Ersoy, Zeynep; Ulas, Aydin; Zeyneloglu, Pinar; Pirat, Arash; Haberal, Mehmet; 0000-0003-0767-1088; 0000-0003-3299-6706; 0000-0002-3462-7632; 0000-0003-2312-9942; 0000-0002-8130-9901; 28260481; AAF-3066-2021; AAJ-2066-2021; AAJ-8097-2021; AAJ-2057-2021; C-3736-2018
Objectives: Our objective was to evaluate the incidence of renal replacement therapy after orthotopic liver transplant and to evaluate and analyze patient outcomes. Materials and Methods: We performed a retrospective analysis of 177 consecutive patients at a tertiary care unit who underwent orthotopic liver transplant between January 2010 and June 2016. Patients who were admitted to the intensive care unit after orthotopic liver transplant and who required renal replacement therapy were included. Results: A total of 177 (79 adult, 98 pediatric) orthotopic liver transplants were performed during the study period. Of these, 35 patients (19%) required renal replacement therapy during the early posttrans plantation period. After excluding 5 patients with previous chronic renal failure, 30 patients (17%; 20 adult [25%], 10 pediatric [10%]) with acute kidney injury required renal replacement therapy. The mean patient age was 31.1 +/- 20.0 years, with a mean Model for End-stage Liver Disease score of 16.7 +/- 12.3. Of the patients with acute kidney injury who underwent renal replacement therapy, in-hospital mortality was 23.3% (7 of 30 patients), and 40% remained on dialysis. No significant difference was seen in mortality between early versus delayed initiation of renal replacement therapy in patients with stage 3 acute kidney injury (P = .17). Conclusions: Of liver transplant recipients who present with acute kidney injury, 19% require renal replacement therapy, and in-hospital mortality is 20% in the early postoperative period.
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
Late Intensive Care Unit Admission in Liver Transplant Recipients: 10-Year Experience
(2015) Atar, Funda; Gedik, Ender; Kaplan, Serife; Zeyneloglu, Pinar; Pirat, Arash; Haberal, Mehmet; 0000-0002-3462-7632; 0000-0002-7175-207X; 0000-0003-2312-9942; 0000-0001-6762-895X; 26640903; AAJ-8097-2021; ABI-2971-2020; C-3736-2018; GLV-1652-2022
Objectives: We evaluated late intensive care unit admission in liver transplant recipients to identify incidences and causes of acute respiratory failure in the postoperative period and to compare these results with results in patients who did not have acute respiratory failure. Materials and Methods: We retrospectively screened the data of 173 consecutive adult liver transplant recipients from January 2005 through March 2015 to identify patients with late admission (> 30 d posttransplant) to an intensive care unit. Patients were divided into 2 groups: patients with and without acute respiratory failure. Acute respiratory failure was defined as severe dyspnea, respiratory distress, decreased oxygen saturation, hypoxemia or hypercapnia on room air, or need for noninvasive or invasive mechanical ventilation. Demographic, laboratory, clinical, and respiratory data were collected. Model for End-Stage Liver Disease, Acute Physiology and Chronic Health Evaluation II, and Sequential Organ Failure Assessment scores; lengths of intensive care unit and hospital stays; and hospital mortality were assessed. Results: Among 173 patients, 37 (21.4%) were admitted to an intensive care unit, including 22 (59.5%) with acute respiratory failure. The leading cause of acute respiratory failure was pneumonia (n = 19, 86.4%). Patients with acute respiratory failure had significantly lower levels of albumin before intensive care unit admission (P =.003). In patients with acute respiratory failure, severe sepsis and septic shock were more frequently observed and tracheotomy was more frequently performed (P=.041). Conclusions: Acute respiratory failure developed in 59.5% of liver transplant recipients with late intensive care unit admission. The leading cause was pneumonia, with this group of patients having higher requirements for invasive mechanical ventilation and tracheotomy, longer stays in an intensive care unit, and higher mortality.
Left Ventricular Assist Device As The Bridge to Heart Transplantation: Five-Case Series
(2016) Firat, Aynur Camkiran; Akovali, Nukhet; Gedik, Ender; Zeyneloglu, Pinar; Ozkan, Murat; Sezgin, Atilla; Pirat, Arash; https://orcid.org/0000-0002-7175-207X; ABI-2971-2020
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 Anesthetic Management for Recipients of Orthotopic Liver Transplant Undergoing Nontransplant Surgery
(Başkent Üniversitesi, 2007-12) Zeyneloglu, Pinar; Arslan, Gulnaz; Karakayali, Hamdi; Torgay, Adnan; Sulemanji, Demet; Pirat, Arash
Objectives: The number of organ transplant recipients who present for nontransplant surgery has increased annually. The aim of this study was to evaluate the perioperative anesthetic management of recipients of an orthotopic liver transplant who have undergone nontransplant surgery at Baskent University Hospital. Patients and Methods: The medical records of 22 recipients of an orthotopic liver transplant who had undergone a total of 32 nontransplant elective surgeries between December 1988 and February 2006 were retrospectively reviewed. Demographic information, including the anesthetic management and the results of perioperative liver and renal function tests, was recorded. Results: The mean age of the patients at the time of transplant was 20.2 ± 17.9 years. The mean interval from liver transplant to the first surgery was 739.1 ± 502.2 days. The most frequent type of surgery was abdominal (28.1%). The types of anesthetic techniques used were general (75%), regional (9.4%), local (9.4%), and sedoanalgesia (6.3%). General anesthesia was induced with thiopental, propofol, or ketamine, and was maintained with isoflurane and nitrous oxide. Endotracheal intubation was performed in 43.8% of the patients. Spinal anesthesia was induced in 3 patients, and peripheral neural blockage was used in 2 patients. Prothrombin time, activated partial thromboplastin time, international normalized ratio, and levels of serum alanine transaminase, aspartate transaminase, total bilirubin, blood urea nitrogen, and creatinine were similar preoperatively and on the first day after surgery (P > .05). Conclusions: In this study, neither regional nor general anesthesia was associated with a deterioration of liver function. We suggest that recipients of orthotopic liver transplant can undergo nontransplant surgery without postoperative graft dysfunction if hepatic perfusion is maintained with appropriate anesthetic management.