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1.
Cureus ; 14(11): e31627, 2022 Nov.
Article in English | MEDLINE | ID: mdl-36540429

ABSTRACT

Introduction Aortic valve replacement (AVR) is a mainstay treatment for moderate to severe aortic valve stenosis. This retrospective study aimed to compare the clinical outcomes of mini-sternotomy and conventional sternotomy. Methodology This 10-year retrospective study compared the clinical outcomes of mini-sternotomy and full sternotomy. Patient-related outcomes include sternal wound dehiscence, operative time, length of hospital stay, and Intensive Care Unit (ICU) stay, whereas intraoperative parameters such as cardiopulmonary bypass (CPB) time and Aortic Cross Clamp time (ACCt) were compared between the two treatment groups. Results A total of 371 patients underwent AVR. Among them, 238 patients had AVR with full sternotomy and 133 patients had a mini-sternotomy. Full sternotomy patients had significantly lower bleeding than those in the mini-AVR group (p-0.002). The operation time was also found to be significantly higher in the mini-AVR group. The duration of hospital stays, ICU stay, and deep sternal wound dehiscence were recorded to be statistically insignificant between the two treatment groups. Atrial fibrillation, sternal wound dehiscence, stroke and perioperative myocardial infarctions, were equally observed between the two groups. Conclusion Mini-sternotomy is a safe option for AVR. The same number of complications were observed between the two groups; however, there was a reduction in the duration of hospital stay and ICU stay amongst the mini-sternotomy group.

2.
Cureus ; 14(8): e27747, 2022 Aug.
Article in English | MEDLINE | ID: mdl-35949447

ABSTRACT

Introduction Hip fracture is commonly seen in elderly patients because of low-energy trauma. It carries significant morbidity and mortality. Scoring systems such as the Nottingham hip fracture score (NHFS) have shown a good correlation with increased mortality as the value of these scores increases. In our study, we aim to ascertain the hip fracture mortality in our population, compare the mortality in hip fractures compared to previously reported figures in literature and nationally reported figures during the first year of the COVID-19 pandemic, and also ascertain the usefulness of NHFS in predicting mortality in hip fractures. Methods We gathered mortality data on hip fracture patients admitted to our unit from January 1, 2020 to December 31, 2020. NHFS was calculated for all patients and the 30-day mortality rate was compared to previously reported hip fracture mortality rates using the standard mortality ratio (SMR). One-year mortality was stratified by placing patients in high and low NHFS groups. The log-rank test was used to compare hip fracture survival at one month and at one year in the high NHFS (NHFS >4) group and low NHFS group (NHFS value 4 or below). Additionally, a log-rank test was used to compare one-month and one-year survival in hip fractures managed with hemiarthroplasty, dynamic hip screw and intramedullary nail. Results In 2020, 388 patients were admitted with hip fractures to our unit. The crude mortality rate was 3.9% at 30 days and 20.88% at one year. Compared to the National Hip Fracture Database report for 2020, the incidence risk ratio for mortality was 0.46 (p-value<0.05). The SMR at 30 days was 0.34 (CI=0.17-0.51) and the SMR at one year was 0.63 (CI=0.49-0.77). The survival rate was higher at 30 days and one year in the low NHFS group compared to the high NHFS group (p-value<0.01). The survival rate at one month and one year were similar in groups managed with hemiarthroplasty, dynamic hip screws, and intramedullary nails (p-value>0.05). Conclusions Hip fracture mortality has been decreasing steadily and we noted a lower rate of hip fracture mortality compared to figures reported previously as per NHFS studies even though the study was conducted during the COVID-19 pandemic period. We also noted lower 30-day mortality in our hospital as compared to the national 30-day mortality rate for hip fracture patients in 2020.

3.
Cureus ; 14(7): e27328, 2022 Jul.
Article in English | MEDLINE | ID: mdl-35949731

ABSTRACT

Background Hip fracture is a debilitating injury, especially in older individuals, which is associated with significant morbidity and mortality. In recent decades, there has been a great focus on early rehabilitation and discharge after hip fractures. The aim of such efforts is to minimize the financial and clinical burden of this condition. We conducted our study during the COVID-19 pandemic and compared the length of hospital stay (LOS) in 2020 to the LOS in 2019. Additionally, we studied the factors which may impact the LOS, such as premorbid status according to established scoring systems, the type of fracture, an operation performed, and time to surgery. Methods We collected the data regarding the length of stay (in days) for all hip fracture patients admitted to our unit from 1st January 2019 until 31st December 2020. We then compared the mean LOS for both years using the t-test. We calculated the Nottingham Hip Fracture Score (NHFS) and American Society of Anaesthesiologists (ASA) scores for patients admitted in 2020 and calculated the correlation between increasing values of these scores and the LOS. We also compared the mean LOS for patients admitted in 2020 based on the type of fracture and type of management. We studied the correlation between the time to surgery and the LOS for patients admitted in 2020. Results Three hundred and eighty-eight patients were admitted with hip fractures in 2020, and 452 were admitted in 2019. LOS in 2020 was significantly lower (23.39 days) compared to 2019 (31.36 days) with p<0.01. While evaluating data from 2019, it was noted that there was a small positive correlation between LOS and NHFS (r=0.231, p<0.001) and LOS and ASA (r=0.18, p<0.001). The mean LOS for intracapsular fractures was noted to be lower than that of extracapsular fractures, but this was not statistically significant (p=0.17). An ANOVA test showed that the mean LOS for patients undergoing hemiarthroplasty, dynamic hip screws (DHS), and intramedullary nails (IMN) was significantly longer than for patients managed with total hip replacement or patients managed non-operatively (F=3.551, p<0.01). Conclusion Hip fracture patients admitted to our department were discharged quicker during the first year of the COVID-19 pandemic. The LOS for hip fractures increases with an increase in their NHFS or ASA scores. Extracapsular and intracapsular fractures lead to roughly the same periods of inpatient stay. Patients undergoing hemiarthroplasty, DHS, or IMN stay longer in the hospital compared to other treatment modalities.

4.
Cureus ; 14(7): e27267, 2022 Jul.
Article in English | MEDLINE | ID: mdl-35949806

ABSTRACT

Background Supracondylar elbow fractures occur most frequently in children aged five to seven years and have equal incidence in both genders. They are classified as flexion or extension type injuries with extension type being more common. We aimed to ascertain radiological stability with lateral and crossed wires in this study. We also identified any complications after operative management of these injuries. Methods As part of this retrospective cohort study, we identified all patients who presented with this injury from January 1, 2020, until February 28, 2022. Basic demographic data and type of operation were noted. Baumann angle (BA) and lateral capitellohumeral angle (LCHA) were measured intra-operatively and x-rays were done at the final clinic appointment. The mean of these angles in lateral and crossed wire groups was compared using paired sample t-test. Unpaired t-test was used to compare the means of both groups with normal values for these angles based on previous studies (BA=71.5±6.2 degrees, LCHA= 50.8±6 degrees). Results Fifty patients were admitted during this period. Thirty-three patients had lateral wires and 17 had crossed wires for fixation. No significant change was noted in the mean BA and mean LCHA in both groups on x-rays done intra-operatively and final clinic follow-up (no loss of reduction). No significant difference was noted between BA and LCHA noted for both groups at the final clinic follow-up with previous studies outlining normal values for these angles. No cases of iatrogenic neurovascular injury were identified. Four patients (8%) were referred to physiotherapy due to stiffness. Conclusion Both lateral and crossed wire configurations led to achievement of good radiological stability with BA and LCHA within normal limits. No loss of reduction was noted with both techniques and no risk of iatrogenic nerve injuries was noted in experienced hands.

5.
Ann Med Surg (Lond) ; 79: 103935, 2022 Jul.
Article in English | MEDLINE | ID: mdl-35860148

ABSTRACT

Introduction: Neurovascular problems are common in acute fracture. In the emergency room, a thorough clinical evaluation is required, when examined by an orthopedic specialist or emergency doctors. Materials and methods: we registered our project with the audit department. In the first cycle, we looked at notes from 77 patients from November-December 2020, emphasis to neurovascular documentation from both ED and orthopedic Clerking notes. We submitted our findings at our audit meeting and implemented modifications. Two months later, we re-audited, this time with 82 patients as the sample size. Results: 77 patient notes were reviewed in the first cycle, 51% male and 49% female. In ED clerking notes, 22% patients had no neurovascular documentation, compared to 3.8% of patients in orthopedic clerking. 39% ED notes had acronyms written for the neurovascular status, such as NVI, to 20.7% of orthopedic notes. 82 notes were reviewed in the second cycle,44% male and 56% female.7% of ED clerking notes lacked any neurovascular comments, compared to 0% of orthopedic admission sheets. 10% of the ED sheets contained NVI abbreviation, while 4% of ortho notes had the same. There were specific notes on neurovascular state on 68 of the ED admission sheets evaluated, and 74 of the orthopedic notes did the same. Conclusion: In fracture patients, documentation of neurovascular condition was lacking. The documentation of the details of the neurovascular assessment was poor. Increased recording of neurovascular assessment and improved emergency department evaluation of patients presenting with upper and lower limb injuries were aided by the introduction of teachings.

6.
Ann Med Surg (Lond) ; 78: 103899, 2022 Jun.
Article in English | MEDLINE | ID: mdl-35734692

ABSTRACT

Background: Golf is a popular sport played worldwide. The majority of professional golfers work as teaching professionals based at golf clubs. All professional players spend numerous hours on the golf course, placing themselves at increased risk of injury. There have been no recent, large studies investigating injury patterns among male and female professional golfers. Objective: To investigate the frequency, types and mechanism of injury sustained by male and female professional golfers and to compare injury patterns between touring and teaching professionals. Methods: Injury data was analyzed from 77 amateur golfers recruited through a questionnaire asking about their different injuries. A web based survey was conducted focusing on injury frequency, location and mechanism and any subsequent time loss. Factors such as side of injury, investigations for the injury were noted. Results: The study enlisted the participation of 76 patients. One was excluded due to incomplete questionairres Injuries were reported by 34 patients (45%). Eleven patients said they had an elbow injury. The relationship between the number of years the individuals had been playing golf and their history of injury was shown to be significant (p = 0.0257). Warm up and injury have a statistically significant relationship (p = 0.846). Conclusion: In order to contribute to making golf a safer and hence more enjoyable lifetime activity, a greater knowledge of golf-related injuries is required. This study attempts to do so, and the elbow was discovered to be the most damaged region.

7.
Ann Med Surg (Lond) ; 71: 102949, 2021 Nov.
Article in English | MEDLINE | ID: mdl-34712478

ABSTRACT

BACKGROUND: Consent is a process of communication and the consent form is an important legal document of the evidence of discussion between doctor and patients. We observed frequent use of abbreviations in the consent forms in our department that can result in misunderstanding and miscommunication when consenting patients for orthopaedic procedures. METHODS: We completed an audit cycle starting by reviewing a total of 350 consent forms retrospectively in level one trauma centres in October-November of 2019 for different orthopaedic trauma procedures. The standards for the project were guidelines published by the general medical council (GMC), The royal college of surgeons (RCS) Glasgow, and the British orthopaedic association (BOA).The results were presented at our mortality and morbidity meeting. Written Feedback was obtained from the attending members on how a change can be implemented to increase ccompliance in filling consent forms. A generic email was sent to all medical professionals to avoid the use of abbreviations on the document and encourage colleagues to point out errors if they spot them. The use of full medical terms and to avoid abbreviations in consent form was well advertised, The re-audit was performed for the period of January & February 2020 that included 400 consent forms. The results were analysed and compared with our original audit results. RESULTS: The use of abbreviations declined from 54% in first audit to 22% in the re-audit. DVT and PE were the most common abbreviations. CONCLUSION: This audit cycle has shown the importance of education and reminders to the health professionals in achieving better adherence to the guidelines and improves patient care.

8.
Ann Med Surg (Lond) ; 71: 102965, 2021 Nov.
Article in English | MEDLINE | ID: mdl-34712480

ABSTRACT

BACKGROUND: In orthopedic surgery, bleeding is an inevitable side effect. The study's aim was to provide estimated blood loss values in various orthopedic procedures and take a step towards developing statistically reliable formulae. This can provide blood loss values in orthopedic surgery, which will be a very good tool for operative planning. MATERIALS AND METHODS: We reviewed case notes of 282 patients in a UK based trauma center from December 2020 to March 2021,who had undergone a various orthopedic procedures. The results were analyzed using SPSS version 25. RESULTS: Most common fracture was neck of femur (37.5%)followed by intertrochanteric fractures(27.6%). Paired t-test was used, and there is good evidence (t281 = 14.957, p = 0.000) that intraoperative transfusions increased HB levels in patients (t281 = 14.957, p = 0.000) by an average of 1.331 points, with a 95% confidence interval of 1.156-1.506. As a result, the variation between the Pre-op and Post-op HB levels is statistically important but minimal. We can see that the mean blood loss is statistically different in different age groups (0.03) of patients and by the existence of co-morbids using analysis of variance (0.04). The average number of days spent in the hospital varies by surgical type (0.01) performed on patients. CONCLUSION: Orthopedic surgery can be associated with high levels of blood loss. There is a significant relation between fracture form and age groups, change of wound dressing (COD), use of a tourniquet, and drain insertion, no connection was noted between gender and fracture types.

9.
Ann Med Surg (Lond) ; 68: 102552, 2021 Aug.
Article in English | MEDLINE | ID: mdl-34295467

ABSTRACT

BACKGROUND: In the context of liver transplantation for hepatocellular carcinoma (HCC), traditional transplant criteria appear restrictive. The objective of the current study was to determine risk factors for recurrence and improve transplant eligibility in patients with HCC. MATERIALS AND METHODS: This was a retrospective study of patients who underwent living donor liver transplant (LDLT) for HCC (n = 219). Largest tumor diameter, tumor number, AFP and neutrophil to lymphocyte ratio were assessed. Multivariate analysis was performed to develop risk scores. The new model was compared with seven previously published transplant criteria using receiver operator curves. RESULTS: Largest tumor size >3.7 cm [HR:2.6, P = 0.02], and AFP > 600 ng/ml [HR:4.7, P = 0.001] were independent predictors of recurrence. Patients with risk scores of 0, 1-3, 4-6 and 7-9 had recurrence rate of 5.9%, 12.5%, 25% and 58.4% respectively. When compared with Milan criteria, Metro ticket 2.0, AFP model and Samsung criteria; transplant eligibility increased by 31.5%, 22.9%, 8.7%, and 7% respectively. Recurrence rate with the current model was 16/199 (8%) (P < 0.0001) and was comparable with other transplant criteria (6.9-9.1%). On ROC analysis, only Milan criteria (AUC = 0.7, P = 0.001) and the current model (AUC = 0.66, P = 0.01) showed significance for recurrence. All patients with high risk scores within Milan criteria had recurred at 3 years (P = 0.03). CONCLUSIONS: Low AFP can be used to select patients for LDLT outside traditional criteria for HCC, with comparable recurrence rates.

10.
BMC Cancer ; 20(1): 754, 2020 Aug 12.
Article in English | MEDLINE | ID: mdl-32787864

ABSTRACT

BACKGROUND: Living donor liver transplantation (LDLT) is an acceptable treatment option for hepatocellular carcinoma (HCC). Traditional transplant criteria aim at best utilization of donor organs with low risk of post transplant recurrence. In LDLT, long term recurrence free survival (RFS) of 50% is considered acceptable. The objective of the current study was to determine preoperative factors associated with high recurrence rates in LDLT. METHODS: Between April 2012 and December 2019, 898 LDLTs were performed at our center. Out of these, 242 were confirmed to have HCC on explant histopathology. We looked at preoperative factors associated with ≤ 50%RFS at 4 years. For survival analysis, Kaplan Meier curves were used and Cox regression analysis was used to identify independent predictors of recurrence. RESULTS: Median AFP was 14.4(0.7-11,326.7) ng/ml. Median tumor size was 2.8(range = 0.1-11) cm and tumor number was 2(range = 1-15). On multivariate analysis, AFP > 600 ng/ml [HR:6, CI: 1.9-18.4, P = 0.002] and microvascular invasion (MVI) [HR:5.8, CI: 2.5-13.4, P <  0.001] were independent predictors of 4 year RFS ≤ 50%. When AFP was > 600 ng/ml, MVI was seen in 88.9% tumors with poor grade and 75% of tumors outside University of California San Francisco criteria. Estimated 4 year RFS was 78% for the entire cohort. When AFP was < 600 ng/ml, 4 year RFS for well-moderate and poor grade tumors was 88 and 73%. With AFP > 600 ng/ml, RFS was 53% and 0 with well-moderate and poor grade tumors respectively (P <  0.001). CONCLUSION: Patients with AFP < 600 ng/ml have acceptable outcomes after LDLT. In patients with AFP > 600 ng/ml, a preoperative biopsy to rule out poor differentiation should be considered for patient selection.


Subject(s)
Carcinoma, Hepatocellular/surgery , Liver Neoplasms/surgery , Liver Transplantation , Living Donors , Neoplasm Recurrence, Local , Adult , Aged , Carcinoma, Hepatocellular/blood , Carcinoma, Hepatocellular/mortality , Carcinoma, Hepatocellular/pathology , Female , Humans , Kaplan-Meier Estimate , Liver Neoplasms/blood , Liver Neoplasms/mortality , Liver Neoplasms/pathology , Liver Transplantation/mortality , Male , Middle Aged , Patient Selection , Preoperative Care , Regression Analysis , Tumor Burden , alpha-Fetoproteins/metabolism
11.
Langenbecks Arch Surg ; 404(3): 293-300, 2019 May.
Article in English | MEDLINE | ID: mdl-30859361

ABSTRACT

PURPOSE: Occasionally, a recipient's native hepatic arteries are not suitable for reconstruction in living donor liver transplantation (LDLT). The use of the great saphenous vein (GSV) conduits in such patients is seldom practiced since arterial conduits from deceased donors are available. Here, we share our experience with a significantly large group of LDLT recipients who underwent arterial reconstruction with GSV conduits. METHODS: We reviewed patients who underwent LDLT between 2012 and 2017. Patients who had arterial reconstruction using native hepatic arteries (group 1)(n = 452) were compared with those who had GSV interposition conduits for reconstruction (group 2)(n = 21). We compared hepatic artery thrombosis (HAT) rate, allograft dysfunction, morbidity, mortality, and actuarial 5-year survival in the two groups. RESULTS: HAT was seen in 0/452 (0%) versus 1/21(4.7%) patients (P = 0.04). Allograft dysfunction was seen in 89/423 (21%) versus 6/19(31.5%) (P = 0.2) patients. Overall mortality was 81/452 (17.9%) versus 8/21(38%) (P = 0.02). Death after a biliary complication was seen in 24/452 (5.3%) versus 4/21 (19%) patients (P = 0.02). Actuarial 1- and 5-year overall survival was 85% versus 67% and 79% versus 58% (P = 0.008). CONCLUSION: GSV conduits are a suboptimal alternative for establishing hepatic arterial inflow in LDLT, but remain valuable in ominous situations.


Subject(s)
Hepatic Artery/surgery , Liver Transplantation , Living Donors , Saphenous Vein/transplantation , Vascular Surgical Procedures/methods , Adolescent , Adult , Aged , Anastomosis, Surgical , Female , Graft Survival , Humans , Liver Transplantation/mortality , Male , Middle Aged , Prospective Studies , Survival Rate
12.
J Clin Exp Hepatol ; 9(6): 704-709, 2019.
Article in English | MEDLINE | ID: mdl-31889751

ABSTRACT

BACKGROUND: Living donor liver transplantation (LDLT) is an established treatment for patients with cirrhosis and hepatocellular carcinoma (HCC) within Milan criteria. Acceptable outcomes have been demonstrated in patients fulfilling extended criteria. Here, we share our experience with LDLT for patients with HCC within and beyond Milan criteria, with emphasis on poor prognostic factors. METHODS: We retrospectively reviewed patients who underwent LDLT between 2012 and 2017 and had HCC proven on explant liver histopathology. A total of 117 patients were included. Patients who died early after transplant (in <30 days) were excluded. For outcomes, patients were divided into prognostic groups. These groups were based on (1) alpha fetoprotein >600, (2) poor differentiation, and (3) the presence of lymphovascular invasion. Recurrence-free survival (RFS) was determined using Kaplan-Meier curves. RESULTS: Median age was 53 (30-73) years. Median follow-up was 20.3 (1-63.2) months. Median model for end stage liver disease (MELD) score was 19 (9-34). Of a total of 117 patients, 74 (63.2%) patients met Milan criteria. Recurrence rate was 12/117 (10.3%). Actuarial 5-year RFS was 88% and 82% (P = 0.3) in patients within and outside Milan criteria. There was no difference in 3-year RFS in patients with 0, 1, or 2 poor prognostic factors within Milan criteria (92%, 87%, and 75%, respectively; P = 0.3). However, a significant difference in RFS was seen in patients outside Milan criteria (92%, 93%, and 53%; P = 0.03). CONCLUSIONS: Patients within Milan criteria have acceptable RFS even in the presence of poor prognostic factors. However, the presence of two or more poor prognostic variables significantly impacts RFS of patients outside Milan criteria.

13.
World J Surg ; 42(4): 1111-1119, 2018 04.
Article in English | MEDLINE | ID: mdl-28936685

ABSTRACT

BACKGROUND: There is paucity of data on intermediate-term post liver transplant outcomes from South Asia. The objective of this study was to determine survival outcomes in patients who underwent living donor liver transplantation (LDLT) in a busy liver transplant center in Pakistan. METHODS: This study was a review of patients who underwent LDLT between 2012 and 2016. A total of 321 patients were included in this study. Early (within 90 days) and late (>90 days) morbidity and mortality was assessed. Estimated 1- and 4-year survival was determined. RESULTS: Median age was 48 (18-73) years. Male to female ratio was 4.5:1. Out of total 346 complications, 184 (57.3%) patients developed 276 (79.7%) complications in early post-transplant period, whereas there were 70 (21.3%) late complications. Most common early complication was pleural effusion in 46 (16.6%) patients. Biliary complications were the most common late complication and were seen in 31/70 (44.2%) patients. Overall 21.4% patients had a biliary complication. The 3-month mortality was 14%. The estimated 1- and 4-year OS for a MELD cutoff of 30 was 84.5 versus 72 and 80 versus 57% (P = 0.01). There was no donor mortality. CONCLUSION: Acceptable intermediate-term post-transplant outcomes were achieved with LDLT. There is a need to improve outcomes in high-MELD patients.


Subject(s)
Graft Survival , Liver Failure/surgery , Liver Transplantation/adverse effects , Living Donors , Postoperative Complications/epidemiology , Adolescent , Adult , Aged , Female , Humans , Male , Middle Aged , Pakistan , Retrospective Studies , Severity of Illness Index , Time Factors , Treatment Outcome , Young Adult
14.
Int J Surg ; 44: 281-286, 2017 Aug.
Article in English | MEDLINE | ID: mdl-28694002

ABSTRACT

BACKGROUND: As a quality assessment tool, failure to rescue (FTR) has been employed in various surgical specialties. However, its role in liver transplantation has only recently been explored. To the best of our knowledge, role of FTR in living donor liver transplant (LDLT) has not been assessed previously. The objective of the current study was to determine failure to rescue (FTR) rate and it's predictors in an LDLT center. MATERIALS AND METHODS: We reviewed a prospectively maintained database of patients who underwent LDLT at our center between 2012 and 2016. Patients who experienced grade 3B or above complications on Clavien-Dindo grading were included in this study. Primary outcome of interest was FTR rate in these patients. FTR was defined as a preventable major complication followed by death within one year after transplantation. We also looked at independent predictors of FTR in our patients and a multivariate analysis was performed. RESULTS: Median age was 48.4(18-73) years. Male to female ratio was 3.3:1. Median MELD score was 17(6-42). The FTR rate in the current study was 52/131 (39.6%). Infectious complications were more common in the FTR group i.e. 22/32(68.8%) versus 10/32 (31.2%) (P < 0.0001). Biliary complications were more common in the non-FTR group i.e. 49/62 (79.1%) versus 13/62 (20.9%) (P < 0.0001). On multivariate analysis, there was a 60% increase in mortality following a major complication in the presence of early allograft dysfunction (Hazard ratio: 1.6, Confidence interval; 1.2-2.2, P = 0.002). A 40% reduction in FTR was seen in patients with a biliary complication versus other complications (Hazard ratio: 0.6, Confidence interval = 0.4-0.8, P = 0.009). CONCLUSION: Early allograft dysfunction and biliary complications are independent predictors of FTR in LDLT.


Subject(s)
Liver Failure/surgery , Liver Transplantation/adverse effects , Postoperative Complications , Adult , Aged , Female , Graft Rejection , Humans , Liver Transplantation/mortality , Living Donors , Male , Middle Aged , Multivariate Analysis , Postoperative Complications/etiology , Postoperative Complications/mortality , Proportional Hazards Models , Quality Assurance, Health Care/methods , Retrospective Studies , Survival Analysis , Young Adult
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