2.Postoperative subacute static progressive stretch does not increase the risk of distal lower limb venous thromboembolism.
Jun-Kun ZHU ; Feng-Feng WU ; Rui-Feng YANG ; Fen-Fen XU ; Ya-Li LIN ; Miao-Fang YE
Chinese Journal of Traumatology 2023;26(3):178-182
		                        		
		                        			PURPOSE:
		                        			Static progressive stretch (SPS) can be applied to treat chronic joint stiffness. However, the impacts of subacute application of SPS to the distal lower limbs, where deep vein thrombosis (DVT) is common, on venous thromboembolism remain unclear. This study aims to explore the risk of venous thromboembolism events following subacute application of SPS.
		                        		
		                        			METHODS:
		                        			A retrospective cohort study was conducted on patients diagnosed with DVT following a lower extremity orthopedic surgery before being transferred to the rehabilitation ward from May 2017 to May 2022. Patients with unilateral lower limb comminuted para-articular fractures, transferred to rehabilitation ward for further treatment within 3 weeks after operation, followed up more than 12 weeks since initial manual physiotherapy, and diagnosed DVT by ultrasound before rehabilitation course were included in the study. Patients with polytrauma, without evidence of previous peripheral vascular disease or incompetence, had medication for thrombosis treatment or prophylaxis before the operation, detected with paralysis due to nervous system impairment, infected after operation during the regime, or with acute progression of DVT were excluded. The included patients were randomized to the standard physiotherapy and the SPS integrated groups for observation. Associated DVT and pulmonary embolism data were collected during the physiotherapy course to compare the groups. SSPS 28.0 and GraphPad Prism 9 were used for data processing. A p < 0.05 was set significant difference.
		                        		
		                        			RESULTS:
		                        			In total of 154 patients with DVT participating in this study, 75 of them were treated with additional SPS for postoperative rehabilitation. The participants in the SPS group showed improved range of motion (12.3° ± 6.7°). However, in the SPS group, there was no difference in thrombosis volume between the start and termination (p = 0.106, p = 0.787, respectively), although difference was seen intra-therapy (p < 0.001). Contingency analysis revealed the pulmonary embolism incidence (OR = 0.703) in the SPS group compared to the mean physiotherapy.
		                        		
		                        			CONCLUSION
		                        			The SPS technique is a safe and reliable option to prevent potential joint stiffness without aggravating the risk of distal DVT for postoperative patients suffering from relevant trauma.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Venous Thromboembolism/prevention & control*
		                        			;
		                        		
		                        			Venous Thrombosis/etiology*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Pulmonary Embolism/complications*
		                        			;
		                        		
		                        			Lower Extremity
		                        			;
		                        		
		                        			Risk Factors
		                        			
		                        		
		                        	
3.Trauma-induced pulmonary thromboembolism: What's update?
Chinese Journal of Traumatology 2022;25(2):67-76
		                        		
		                        			
		                        			Trauma-induced pulmonary thromboembolism is the second leading cause of death in severe trauma patients. Primary fibrinolytic hyperactivity combined with hemorrhage and consequential hypercoagulability in severe trauma patients create a huge challenge for clinicians. It is crucial to ensure a safe anticoagulant therapy for trauma patients, but a series of clinical issues need to be answered first, for example, what are the risk factors for traumatic venous thromboembolism? How to assess and determine the status of coagulation dysfunction of patients? When is the optimal timing to initiate pharmacologic prophylaxis for venous thromboembolism? What types of prophylactic agents should be used? How to manage the anticoagulation-related hemorrhage and to determine the optimal timing of restarting chemoprophylaxis? The present review attempts to answer the above questions.
		                        		
		                        		
		                        		
		                        			Anticoagulants/adverse effects*
		                        			;
		                        		
		                        			Hemorrhage
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Pulmonary Embolism/prevention & control*
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Venous Thromboembolism/prevention & control*
		                        			
		                        		
		                        	
4.Prevention, diagnosis and treatment of perioperative complications of bariatric and metabolic surgery.
Haifu WU ; Ming ZHONG ; Di ZHOU ; Chenye SHI ; Heng JIAO ; Wei WU ; Xinxia CHANG ; Jing CANG ; Hua BIAN
Chinese Journal of Gastrointestinal Surgery 2017;20(4):393-397
		                        		
		                        			
		                        			Surgical operation in treating obesity and type 2 diabetes is popularizing rapidly in China. Correct prevention and recognition of perioperation-related operative complications is the premise of ensuring surgical safety. Familiar complications of the operation include deep venous thrombosis, pulmonary artery embolism, anastomotic bleeding, anastomotic fistula and marginal ulcer. The prevention of deep venous thrombosis is better than treatment. The concrete measures contain physical prophylaxis (graduated compression stocking and intermittent pneumatic compression leg sleeves) and drug prophylaxis (unfractionated heparin and low molecular heparin), and the treatment is mainly thrombolysis or operative thrombectomy. The treatment of pulmonary artery embolism includes remittance of pulmonary arterial hypertension, anticoagulation, thrombolysis, operative thrombectomy, interventional therapy and extracorporeal membrane oxygenation (ECMO). Hemorrhage is a rarely occurred but relatively serious complication after bariatric surgery. The primary cause of anastomotic bleeding after laparoscopic gastric bypass is incomplete hemostasis or weak laparoscopic repair. The common bleeding site in laparoscopic sleeve gastrectomy is gastric stump and close to partes pylorica, and the bleeding may be induced by malformation and weak repair technique. Patients with hemodynamic instability caused by active bleeding or excessive bleeding should timely received surgical treatment. Anastomotic fistula in gastric bypass can be divided into gastrointestinal anastomotic fistula and jejunum-jejunum anastomotic fistula. The treatment of postoperative anastomotic fistula should vary with each individual, and conservative treatment or operative treatment should be adopted. Anastomotic stenosis is mainly related to the operative techniques. Stenosis after sleeve gastrectomy often occurs in gastric angle, and the treatment methods include balloon dilatation and stent implantation, and surgical treatment should be performed when necessary. Marginal ulcer after gastric bypass is a kind of peptic ulcer occurring close to small intestine mucosa in the junction point of stomach and jejunum. Ulcer will also occur in the vestige stomach after laparoscopic sleeve gastrectomy, and the occurrence site locates mostly in the gastric antrum incisal margin. Preoperative anti-HP (helicobacter pylorus) therapy and postoperative continuous administration of proton pump inhibitor (PPI) for six months is the main means to prevent and treat marginal ulcer. For patients on whom conservative treatment is invalid, endoscopic repair or surgical repair should be considered. Different surgical procedures will generate different related operative complications. Fully understanding and effectively dealing with the complications of various surgical procedures through multidisciplinary cooperation is a guarantee for successful operation.
		                        		
		                        		
		                        		
		                        			Anastomosis, Surgical
		                        			;
		                        		
		                        			adverse effects
		                        			;
		                        		
		                        			Anticoagulants
		                        			;
		                        		
		                        			therapeutic use
		                        			;
		                        		
		                        			Bariatric Surgery
		                        			;
		                        		
		                        			adverse effects
		                        			;
		                        		
		                        			Catheterization
		                        			;
		                        		
		                        			China
		                        			;
		                        		
		                        			Conservative Treatment
		                        			;
		                        		
		                        			Constriction, Pathologic
		                        			;
		                        		
		                        			etiology
		                        			;
		                        		
		                        			therapy
		                        			;
		                        		
		                        			Digestive System Fistula
		                        			;
		                        		
		                        			etiology
		                        			;
		                        		
		                        			therapy
		                        			;
		                        		
		                        			Endoscopy, Gastrointestinal
		                        			;
		                        		
		                        			methods
		                        			;
		                        		
		                        			Extracorporeal Membrane Oxygenation
		                        			;
		                        		
		                        			Gastrectomy
		                        			;
		                        		
		                        			adverse effects
		                        			;
		                        		
		                        			Gastric Bypass
		                        			;
		                        		
		                        			adverse effects
		                        			;
		                        		
		                        			Gastric Mucosa
		                        			;
		                        		
		                        			pathology
		                        			;
		                        		
		                        			Gastric Stump
		                        			;
		                        		
		                        			physiopathology
		                        			;
		                        		
		                        			surgery
		                        			;
		                        		
		                        			Gastrointestinal Hemorrhage
		                        			;
		                        		
		                        			etiology
		                        			;
		                        		
		                        			prevention & control
		                        			;
		                        		
		                        			surgery
		                        			;
		                        		
		                        			Hemostasis, Surgical
		                        			;
		                        		
		                        			adverse effects
		                        			;
		                        		
		                        			methods
		                        			;
		                        		
		                        			Hemostatic Techniques
		                        			;
		                        		
		                        			Heparin
		                        			;
		                        		
		                        			therapeutic use
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Intermittent Pneumatic Compression Devices
		                        			;
		                        		
		                        			Intestine, Small
		                        			;
		                        		
		                        			pathology
		                        			;
		                        		
		                        			Laparoscopy
		                        			;
		                        		
		                        			adverse effects
		                        			;
		                        		
		                        			Margins of Excision
		                        			;
		                        		
		                        			Peptic Ulcer
		                        			;
		                        		
		                        			etiology
		                        			;
		                        		
		                        			therapy
		                        			;
		                        		
		                        			Postoperative Complications
		                        			;
		                        		
		                        			diagnosis
		                        			;
		                        		
		                        			prevention & control
		                        			;
		                        		
		                        			therapy
		                        			;
		                        		
		                        			Pulmonary Embolism
		                        			;
		                        		
		                        			etiology
		                        			;
		                        		
		                        			therapy
		                        			;
		                        		
		                        			Stents
		                        			;
		                        		
		                        			Stockings, Compression
		                        			;
		                        		
		                        			Thrombectomy
		                        			;
		                        		
		                        			Thrombolytic Therapy
		                        			;
		                        		
		                        			Venous Thrombosis
		                        			;
		                        		
		                        			etiology
		                        			;
		                        		
		                        			prevention & control
		                        			;
		                        		
		                        			therapy
		                        			
		                        		
		                        	
5.Deep Vein Thrombosis in the Lower Extremities in Comatose Elderly Patients with Acute Neurological Diseases.
Shoko Merrit YAMADA ; Yusuke TOMITA ; Hideki MURAKAMI ; Makoto NAKANE
Yonsei Medical Journal 2016;57(2):388-392
		                        		
		                        			
		                        			PURPOSE: Comatose elderly patients with acute neurological illness have a great risk of deep vein thrombosis (DVT). In this study, the incidence of DVT and the effectiveness of early initiation of treatment were evaluated in those patients. MATERIALS AND METHODS: Total 323 patients were admitted to our ward due to neurological diseases in one year, and 43 patients, whose Glasgow Coma Scale was < or =11 and who was older than > or =60 years, were included in this study. D-dimer was measured on admission and day 7, and lower-extremity ultrasonography was performed on day 7. When DVT was positive, heparin treatment was initiated, and further evaluation of pulmonary embolism (PE) was conducted. Vena cava filter protection was inserted in PE-positive patients. Incidence of DVT and PE, alteration of D-dimer value, and effect of heparin treatment were analyzed. RESULTS: DVT was positive in 19 (44.2%) patients, and PE was in 4 (9.3%). D-dimer was significantly higher in DVT-positive group on day 7 (p<0.01). No DVT were identified in patients with ischemic disease, while 66.7% of intracerebral hemorrhage and 53.3% of brain contusion patients were DVT positive. Surgery was a definite risk factor for DVT, with an odds ratio of 5.25. DVT and PE disappeared by treatment in all cases, and no patients were succumbed to the thrombosis. CONCLUSION: Patients with hemorrhagic diseases or who undergo operation possess high risk of DVT, and initiation of heparin treatment in 7 days after admission is an effective prophylaxis for DVT in comatose elderly patients without causing bleeding.
		                        		
		                        		
		                        		
		                        			Acute Disease
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Anticoagulants/adverse effects/therapeutic use
		                        			;
		                        		
		                        			Antifibrinolytic Agents/therapeutic use
		                        			;
		                        		
		                        			*Coma
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Fibrin Fibrinogen Degradation Products/therapeutic use
		                        			;
		                        		
		                        			Hemorrhage/*epidemiology
		                        			;
		                        		
		                        			Heparin/adverse effects/therapeutic use
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Incidence
		                        			;
		                        		
		                        			Japan/epidemiology
		                        			;
		                        		
		                        			Lower Extremity
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Nervous System Diseases/epidemiology
		                        			;
		                        		
		                        			Neurosurgical Procedures/*adverse effects
		                        			;
		                        		
		                        			Pulmonary Embolism/*complications/epidemiology/prevention & control
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Venous Thrombosis/epidemiology/*etiology/prevention & control
		                        			
		                        		
		                        	
6.The Efficacy of Low Molecular Weight Heparin for the Prevention of Venous Thromboembolism after Hip Fracture Surgery in Korean Patients.
Kwang Kyoun KIM ; Yougun WON ; Ye Yeon WON
Yonsei Medical Journal 2016;57(5):1209-1213
		                        		
		                        			
		                        			PURPOSE: The aim of this study was to investigate the efficacy of low-molecular-weight heparin (LMWH) for the prevention of venous thromboembolism in Korean patients who underwent hip fracture surgery (HFS). MATERIALS AND METHODS: Prospectively, a total 181 cases were classified into the LMWH user group (116 cases) and LMWH non-user group (65 cases). Each group was sub-classified according to fracture types as follows: 81 cases of intertrochanteric fracture (group A: 49, group B: 32) and 100 cases of neck fracture (group C: 67, group D: 33). We compared the incidence of deep vein thrombosis (DVT) and pulmonary embolism (PE) according to LMWH use. RESULTS: Of the 181 cases, four DVTs were found in the LMWH user groups (1 in group A, and 3 in group C). One case of PE was found in LMWH non-user group D. The incidences of DVT and PE showed no statistically significant differences between the LMWH user and non-user groups (p=0.298 and 0.359, respectively). In subgroup analysis, no statistically significant differences were found between groups A and B and between groups C and D. CONCLUSION: The administration of LMWH was not effective in the prevention of venous thromboembolism and PE in the Korean patients who underwent HFS.
		                        		
		                        		
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Anticoagulants/*therapeutic use
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Heparin, Low-Molecular-Weight/*therapeutic use
		                        			;
		                        		
		                        			Hip Fractures/classification/*surgery
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Postoperative Complications/*prevention & control
		                        			;
		                        		
		                        			Pulmonary Embolism/etiology/*prevention & control
		                        			;
		                        		
		                        			Republic of Korea
		                        			;
		                        		
		                        			Venous Thromboembolism/*prevention & control
		                        			;
		                        		
		                        			Venous Thrombosis/etiology/*prevention & control
		                        			
		                        		
		                        	
7.Preventing Venous Thromboembolism with Use of Intermittent Pneumatic Compression after Total Hip Arthroplasty in Korean Patients.
Woo Lam JO ; Young Kyun LEE ; Yong Chan HA ; Kyung Min LEE ; Bun Jung KANG ; Kyung Hoi KOO
Journal of Korean Medical Science 2016;31(8):1319-1323
		                        		
		                        			
		                        			Intermittent Pneumatic Compression (IPC) device has been used to prevent venous thromboembolism (VTE). This study investigated the effectiveness of IPC device. We evaluated incidences of deep vein thrombosis (DVT) and pulmonary embolism (PE) in total hip arthroplasty (THA) patients after use of IPC device, and compared with historical incidences from our institution. We applied IPC device in 741 patients who underwent 870 elective primary THAs from January 2010 to December 2013, DVT was detected in 3 patients (0.3%) by sonography, and one (0.1%) of them was symptomatic. Symptomatic PE occurred in 1 patient (0.1%) and there were no cases of fatal PE. The incidence of symptomatic DVT was significantly lower than the historical control (P = 0.042). The IPC is a safe and effective prophylaxis of VTE after primary THA in Korea.
		                        		
		                        		
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Aged, 80 and over
		                        			;
		                        		
		                        			Arthroplasty, Replacement, Hip/*adverse effects
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Incidence
		                        			;
		                        		
		                        			*Intermittent Pneumatic Compression Devices
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Postoperative Complications/etiology
		                        			;
		                        		
		                        			Pulmonary Embolism/diagnostic imaging/epidemiology/*prevention & control
		                        			;
		                        		
		                        			Republic of Korea/epidemiology
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Ultrasonography
		                        			;
		                        		
		                        			Venous Thromboembolism/diagnostic imaging/epidemiology/*prevention & control
		                        			;
		                        		
		                        			Young Adult
		                        			
		                        		
		                        	
8.Preventing Venous Thromboembolism with Use of Intermittent Pneumatic Compression after Total Hip Arthroplasty in Korean Patients.
Woo Lam JO ; Young Kyun LEE ; Yong Chan HA ; Kyung Min LEE ; Bun Jung KANG ; Kyung Hoi KOO
Journal of Korean Medical Science 2016;31(8):1319-1323
		                        		
		                        			
		                        			Intermittent Pneumatic Compression (IPC) device has been used to prevent venous thromboembolism (VTE). This study investigated the effectiveness of IPC device. We evaluated incidences of deep vein thrombosis (DVT) and pulmonary embolism (PE) in total hip arthroplasty (THA) patients after use of IPC device, and compared with historical incidences from our institution. We applied IPC device in 741 patients who underwent 870 elective primary THAs from January 2010 to December 2013, DVT was detected in 3 patients (0.3%) by sonography, and one (0.1%) of them was symptomatic. Symptomatic PE occurred in 1 patient (0.1%) and there were no cases of fatal PE. The incidence of symptomatic DVT was significantly lower than the historical control (P = 0.042). The IPC is a safe and effective prophylaxis of VTE after primary THA in Korea.
		                        		
		                        		
		                        		
		                        			Adolescent
		                        			;
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Aged, 80 and over
		                        			;
		                        		
		                        			Arthroplasty, Replacement, Hip/*adverse effects
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Incidence
		                        			;
		                        		
		                        			*Intermittent Pneumatic Compression Devices
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Postoperative Complications/etiology
		                        			;
		                        		
		                        			Pulmonary Embolism/diagnostic imaging/epidemiology/*prevention & control
		                        			;
		                        		
		                        			Republic of Korea/epidemiology
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Ultrasonography
		                        			;
		                        		
		                        			Venous Thromboembolism/diagnostic imaging/epidemiology/*prevention & control
		                        			;
		                        		
		                        			Young Adult
		                        			
		                        		
		                        	
9.Deep vein thrombosis in arthroscopic surgery and chemoprophylaxis recommendation in an Asian population.
Kuei Siong Andy YEO ; Wen Siang Kevin LIM ; Yee Han Dave LEE
Singapore medical journal 2016;57(8):452-455
INTRODUCTIONThere are currently no guidelines supporting the use of routine chemoprophylaxis to prevent deep vein thrombosis (DVT) in arthroscopic surgery. Studies and meta-analysis show opposing views on its routine use in arthroscopy. This study aimed to examine the incidence of DVT in a prospective cohort of knee arthroscopy and knee arthroplasty patients, and to analyse the risk factors contributing to DVT.
METHODSAll patients scheduled to undergo knee arthroscopy or arthroplasty over a two-year period were included. A standardised regimen of postoperative mechanical prophylaxis and rehabilitation was applied to all patients. Only patients who were postoperatively symptomatic were referred for ultrasonography. DVT incidence was calculated, and univariate and multivariate analyses of the risk factors were performed.
RESULTSThe overall incidence of DVT was 0.5% among the 1,410 arthroscopy patients and 3.1% among the 802 arthroplasty patients. The incidence of proximal DVT among the arthroscopy and arthroplasty patients was 0.4% and 1.1%, respectively. Multivariate analysis showed that age was the only significant predictor of DVT incidence. Using the receiver operating characteristic method, the cut-off age for the arthroscopy and arthroplasty patients was 52 years, while that for the arthroscopy patients only was 40 years (increased risk of DVT: 5.46 and 6.44 times, respectively; negative predictive value: 99.7% and 99.8%, respectively).
CONCLUSIONDVT incidence among Asian arthroplasty and arthroscopy patients remains low, even without chemoprophylaxis. Since age was found to be a significant risk factor for DVT, DVT prophylaxis can be considered for patients in high-risk age groups.
Adult ; Arthroplasty ; Arthroplasty, Replacement, Knee ; adverse effects ; Asian Continental Ancestry Group ; Female ; Humans ; Incidence ; Knee Joint ; surgery ; Male ; Middle Aged ; Multivariate Analysis ; Prospective Studies ; Pulmonary Embolism ; prevention & control ; Rehabilitation ; Risk Factors ; Singapore ; Venous Thrombosis ; etiology
10.Clinical Performance of the 1st American Academy of Orthopaedic Surgeons Clinical Guideline on Prevention of Symptomatic Pulmonary Embolism after Total Knee Arthroplasty in Korean Patients.
Young Gon NA ; Rui FANG ; Yeon Ho KIM ; Kwan Jae CHO ; Tae Kyun KIM
Journal of Korean Medical Science 2015;30(12):1865-1873
		                        		
		                        			
		                        			We sought to document the clinical performance of the 1st American Academy of Orthopaedic Surgeons (AAOS) guideline on the prevention of symptomatic pulmonary embolism (PE) after total knee arthroplasty (TKA) in Korean patients, in terms of the proportions of the each risk-stratified group, efficacy and safety. Consecutive 328 patients underwent TKA were preoperatively assessed for the risks of PE and bleeding and categorized into 4 groups: 1) standard risk, 2) high risk for PE, 3) high risk for bleeding, and 4) high risks both for PE and bleeding. One of three options was administered according to the groups (aspirin in group 1 or 4; enoxaparin and following aspirin in group 2; antithrombotic stocking in group 3). Incidences of symptomatic deep vein thrombosis (DVT) and PE, and major or minor bleeding complications were evaluated. Majority of the patients (86%) were assessed to be with standard risks both for PE and bleeding. No patient experienced symptomatic DVT or PE and major bleeding. Eleven percent of the patients discontinued chemoprophylaxis because of bleeding-related wound complication. In conclusion, the 1st AAOS guideline functions successfully in Korean patients undergoing TKA in terms of prevention of symptomatic DVT and PE while avoiding major bleeding complications.
		                        		
		                        		
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Arthroplasty, Replacement, Knee/*adverse effects
		                        			;
		                        		
		                        			Aspirin/administration & dosage
		                        			;
		                        		
		                        			Cohort Studies
		                        			;
		                        		
		                        			Enoxaparin/administration & dosage
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Fibrinolytic Agents/administration & dosage
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Male
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Orthopedics
		                        			;
		                        		
		                        			Postoperative Complications/etiology/*prevention & control
		                        			;
		                        		
		                        			Postoperative Hemorrhage/etiology/prevention & control
		                        			;
		                        		
		                        			*Practice Guidelines as Topic
		                        			;
		                        		
		                        			Pulmonary Embolism/etiology/*prevention & control
		                        			;
		                        		
		                        			Republic of Korea
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Risk Factors
		                        			;
		                        		
		                        			Societies, Medical
		                        			;
		                        		
		                        			Stockings, Compression
		                        			;
		                        		
		                        			Venous Thrombosis/etiology/prevention & control
		                        			
		                        		
		                        	
            
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