1.Incidence of surgical site infections after transcervical thyroidectomy in patients given antibiotics versus those without antibiotics in a government hospital in the Philippines
Arsenio Claro A. Cabungcal ; Jeric L. Arbizo ; Ana Melissa F. Hilvano-Cabungcal
Acta Medica Philippina 2024;58(6):24-29
		                        		
		                        			Background and Objectives:
		                        			Surgical site infection (SSI) makes up the largest single group of postoperative infective complications. For surgeries classified as clean surgeries of the head and neck, such as a thyroidectomy, the routine administration of antimicrobial prophylaxis is not recommended. Despite this, extended usage of antibiotics is common in developing countries. This study evaluated the need for antibiotics in elective transcervical thyroidectomy for the prevention of SSI in a tertiary government hospital in a developing country.
		                        		
		                        			Methods:
		                        			This is a retrospective cohort study that included patients who have undergone elective transcervical
thyroidectomy at the Department of Otolaryngology - Head and Neck Surgery (ORL-HNS) of the University of the Philippines - Philippine General (UP-PGH) Hospital from August 1, 2020 to June 30, 2022. Data collection was conducted through review of both in-patient and out-patient records.
		                        		
		                        			Results:
		                        			The data of 58 patients were analyzed. The mean (±SD) age was 42.5±14.5 years, with approximately
2:27 male to female ratio. Of the 58 patients, 26 were given postoperative antibiotics while 32 did not receive
postoperative antibiotics. None of the 58 were noted to have SSI on the 3rd postoperative day. Only 54 patients
completed the 7-day follow-up of the study and their data were further analyzed. One patient had SSI. There was no significant difference between the presence and absence of postoperative antibiotics in relation to SSI (p-value>0.05).
		                        		
		                        			Conclusion
		                        			This study shows that in patients undergoing transcervical thyroidectomies, there is no significant
difference in the occurrence of SSI among patients who received and did not receive postoperative antibiotics. Therefore, there is no need to administer postoperative antibiotics, as long as a sterile surgical technique is ensured.
		                        		
		                        		
		                        		
		                        			Surgical Wound Infection
		                        			;
		                        		
		                        			 Thyroidectomy 
		                        			
		                        		
		                        	
2.Prevalence of and risk factors associated with Methicillin-Resistant Staphylococcus aureus(MRSA) carriage among cutting specialties at the Ospital ng Maynila Medical Center
Michael Robert Q. Monteverde ; Ramon Carmelo V. Alcira
Philippine Journal of Otolaryngology Head and Neck Surgery 2024;39(1):12-18
		                        		
		                        			Objective:
		                        			To determine the point prevalence of, and risk factors associated with MRSA carriage among resident physicians of surgical departments at the Ospital ng Maynila Medical Center.
		                        		
		                        			Methods:
		                        			Design: Cross-sectional Study. Setting: Tertiary Government Training Hospital. Participants:51 resident physicians from different surgical departments (general surgery, obstetrics and gynecology, ophthalmology, otorhinolaryngology – head and neck surgery and dermatology) underwent nasal and pharyngeal swabs with microbial culture and sensitivity testing to identify MRSA carriers. Fisher Exact Test and logistic regression were utilized to determine associations between MRSA carriage and various risk factors including frequency of hand washing and departmental affiliation.
		                        		
		                        			Results:
		                        			Overall prevalence rate of MRSA carriage was 9.8%. Otorhinolaryngology residents had the highest combined prevalence of MRSA of 42.9%, significantly higher compared to other departments and were used as a reference in logistic regression analyses. Notably, handwashing only once daily was associated with a 20-fold increase in the risk of MRSA carriage (OR 20.5, 95% CI: 1.82 to 230, p = .014). Other departments did not demonstrate statistically significant differences in MRSA carriage rates.
		                        		
		                        			Conclusions
		                        			Otorhinolaryngology resident physicians had the highest combined prevalence of MRSA and nasal MRSA was found only in otorhinolaryngology residents. The surgical subspecialty and frequency of handwashing of the healthcare worker were identified as important risk factors to develop MRSA carriage. Targeted interventions (including enhanced infection control protocols and regular screening) are needed especially in high-risk departments.
		                        		
		                        		
		                        		
		                        			Methicillin-Resistant Staphylococcus aureus
		                        			;
		                        		
		                        			 Surgical Wound Infection
		                        			
		                        		
		                        	
3.Knowledge, attitudes and practices of surgical trainees and trainers on recommended Surgical Site Infection prevention protocols
Esther A. Saguil ; Jose Modesto B. Abellera III ; Daniel Ernest L. Florendo ; George Robert L. Uyquienco
Philippine Journal of Surgical Specialties 2024;79(2):59-74
RATIONALE/OBJECTIVE
This study aimed to determine the knowledge, attitudes and practices of surgeons and surgical trainees regarding published SSI prevention guidelines. Specifically, the study described knowledge and attitudes towards SSI prevention guidelines among members of surgical training programs, described preoperative, intraoperative, and postoperative practices in SSI prevention and identified the presence of surgical site infection surveillance programs among various institutions.
METHODSThis was a retrospective cross-sectional study that evaluated the knowledge, attitudes, and practices of surgeons and surgical trainees to published SSI prevention guidelines in the Philippines. It utilized existing data from an October 2022 online survey done by the Philippine College of Surgeons distributed to various surgical training institutions in the country.
RESULTSThere were a total of 213 respondents. The different attitudes and knowledge gaps towards present SSI prevention guidelines are described.
CONCLUSIONDespite the existence of local and international guidelines there still appears to be a significant lack of awareness and variability in practice among the different institutions as well as with surgeons of different levels of expertise or training. Varying preoperative, intraoperative and postoperative practices have also been described, including evident deviations from SSI guidelines. Lastly, there is a lack of standardized SSI surveillance programs among institutions and these are not aligned towards improved patient safety and quality improvement.
Human ; Surgical Wound Infection
5.Early-effectiveness of unilateral biportal endoscopic laminectomy in treatment of two-level lumbar spinal stenosis.
Yuhong ZHANG ; Bo FENG ; Weiliang SU ; Dong LIU ; Peng HU ; Huaiwang LU ; Xiaopeng GENG
Chinese Journal of Reparative and Reconstructive Surgery 2023;37(6):706-712
		                        		
		                        			OBJECTIVE:
		                        			To analyze the early effectiveness of unilateral biportal endoscopy (UBE) laminectomy in the treatment of two-level lumbar spinal stenosis (LSS).
		                        		
		                        			METHODS:
		                        			The clinical data of 98 patients with two-level LSS treated with UBE between September 2020 and December 2021 were retrospectively analyzed. There were 53 males and 45 females with an average age of 59.9 years (range, 32-79 years). Among them, there were 56 cases of mixed spinal stenosis, 23 cases of central spinal canal stenosis, and 19 cases of nerve root canal stenosis. The duration of symptoms was 1.5- 10 years, with an average of 5.4 years. The operative segments were L 2, 3 and L 3, 4 in 2 cases, L 3, 4 and L 4, 5 in 29 cases, L 4, 5 and L 5, S 1 in 67 cases. All patients had different degrees of low back pain, among of which 76 cases were with unilateral lower extremity symptoms and 22 cases were with bilateral lower extremity symptoms. There were 29 cases of bilateral decompression in both segments, 63 cases of unilateral decompression in both segments, and 6 cases of unilateral decompression and bilateral decompression of each segment. The operation time, intraoperative blood loss, total incision length, hospitalization stay, ambulation time, and related complications were recorded. Visual analogue scale (VAS) score was used to assess the low back and leg pain before operation and at 3 days, 3 months after operation, and at last follow-up. The Oswestry disability index (ODI) was used to evaluate the functional recovery of lumbar spine before operation and at 3 months and last follow-up after operation. Modified MacNab criteria was used to evaluate clinical outcomes at last follow-up. Imaging examinations were performed before and after operation to measure the preservation rate of articular process, modified Pfirrmann scale, disc height (DH), lumbar lordosis angle (LLA), and cross-sectional area of the canal (CAC), and the CAC improvement rate was calculated.
		                        		
		                        			RESULTS:
		                        			All patients underwent surgery successfully. The operation time was (106.7±25.1) minutes, the intraoperative blood loss was (67.7±14.2) mL, and the total incision length was (3.2±0.4) cm. The hospitalization stay was 8 (7, 9) days, and the ambulation time was 3 (3, 4) days. All the wounds healed by first intention. Dural tear occurred in 1 case during operation, and mild headache occurred in 1 case after operation. All patients were followed up 13-28 months with an average of 19.3 months, and there was no recurrence or reoperation during the follow-up. At last follow-up, the preservation rate of articular process was 84.7%±7.3%. The modified Pfirrmann scale and DH were significantly different from those before operation ( P<0.05), while the LLA was not significantly different from that before operation ( P=0.050). The CAC significantly improved ( P<0.05), and the CAC improvement rate was 108.1%±17.8%. The VAS scores of low back pain and leg pain and ODI at each time point after operation significantly improved when compared with those before operation, and the differences between each time points were significant ( P<0.05). According to the modified MacNab criteria, 63 cases were excellent, 25 cases were good, and 10 cases were fair, with an excellent and good rate of 89.8%.
		                        		
		                        			CONCLUSION
		                        			UBE laminectomy is a safe and effective technique with little trauma and fast recovery for two-level LSS and the early effectiveness is satisfactory.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Laminectomy
		                        			;
		                        		
		                        			Spinal Stenosis/surgery*
		                        			;
		                        		
		                        			Constriction, Pathologic/surgery*
		                        			;
		                        		
		                        			Low Back Pain
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Blood Loss, Surgical
		                        			;
		                        		
		                        			Endoscopy
		                        			;
		                        		
		                        			Lumbar Vertebrae/surgery*
		                        			;
		                        		
		                        			Spinal Fusion/methods*
		                        			;
		                        		
		                        			Decompression, Surgical
		                        			;
		                        		
		                        			Surgical Wound/surgery*
		                        			;
		                        		
		                        			Treatment Outcome
		                        			
		                        		
		                        	
6.Application of intermittent flap opening in L-shaped surgical incision of calcaneal fracture.
An-Shi MING ; Guo-Xiang CHENG ; Deng-Feng ZHU ; Yong-Guo LIU ; Jie WANG ; Hong-Jun LI
China Journal of Orthopaedics and Traumatology 2023;36(4):320-325
		                        		
		                        			OBJECTIVE:
		                        			To explore clinical effect of intermittent flap opening technique in L-shaped incision of calcaneal fracture.
		                        		
		                        			METHODS:
		                        			From January 2017 to January 2019, 48 patients with Sanders typeⅡ to Ⅳ calcaneal fractures were treated by open reduction and internal fixation. According to different flap opening techniques, the patients were divided into control group and observation group, 24 patients in each group. In observation group, there were 17 males and 7 females, aged from 20 to 60 years old with an average of(45.12±9.56) years old;7 patients were typeⅡ, 10 patients were type Ⅲ and 7 patients were type Ⅳ according to Sanders classification;3 patients were C0, 16 patients were C1 and 5 patients were C2 according to Tscherne-Gotzen soft-tissue assessment;treated with intermittent flap technique. In control group, there were 19 males and 5 females aged from 20 to 60 years old with an average of (47.32±10.67) years old;7 patients were typeⅡ, 11 patients were type Ⅲ and 6 patients were type Ⅳ according to Sanders classification;2 patients were C0, 18 patients were C1 and 4 patients were C2 according to Tschemc-Gotzen soft-tissue assessment;treated with static flap opening technique. Operation time, flap retraction time, changes of Böhler angle and Gissane angle before and after operation at 3 days, and occurrence of incision complications were observed and compared between two groups.
		                        		
		                        			RESULTS:
		                        			All patients were followed up from 3 to 6 months with an average of(4.52±1.01) months. There were no significant differences in operation time, changes of Böhler angle and Gissane angle before and after operation at 3 days between the two groups(P>0.05);there was statistical difference in flap retraction time between two groups(P<0.05). Occurrence of incision complications in observation group was significantly lower than that in control group (P<0.05).
		                        		
		                        			CONCLUSION
		                        			Intermittent flap opening technique is superior to static opening technique in reducing incision complications of lateral "L" approach of calcaneus. Single Kirschner wire opening does not affect the exposure, reduction and fixation of fracture during operation.
		                        		
		                        		
		                        		
		                        			Male
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Young Adult
		                        			;
		                        		
		                        			Adult
		                        			;
		                        		
		                        			Middle Aged
		                        			;
		                        		
		                        			Surgical Wound
		                        			;
		                        		
		                        			Treatment Outcome
		                        			;
		                        		
		                        			Fractures, Bone/surgery*
		                        			;
		                        		
		                        			Fracture Fixation, Internal/methods*
		                        			;
		                        		
		                        			Calcaneus/surgery*
		                        			;
		                        		
		                        			Ankle Injuries
		                        			;
		                        		
		                        			Foot Injuries
		                        			;
		                        		
		                        			Knee Injuries
		                        			
		                        		
		                        	
7.Chinese Medicine Plaster as A New Treatment for Surgical Site Infection in Patients with Cesarean Delivery: A Randomized, Double-Blind, Controlled Trial.
Guan-Ya HAN ; Xiao-Li WU ; Dong-Mei LI ; Hai-Rui CAI ; Jun-Jun ZHOU ; Xiao-Bo HE
Chinese journal of integrative medicine 2023;29(6):483-489
		                        		
		                        			OBJECTIVE:
		                        			To evaluate the efficacy of Chinese plaster containing rhubarb and mirabilite on surgical site infection (SSI) in patients with cesarean delivery (CD) by performing a randomized controlled trial.
		                        		
		                        			METHODS:
		                        			This randomized controlled trial included 560 patients with CD due to fetal head descent enrolled at a tertiary teaching center between December 31, 2018 and October 31, 2021. Eligible patients were randomly assigned to a Chinese medicine (CM) group (280 cases) or a placebo group (280 cases) by a random number table, and were treated with CM plaster (made by rhubarb and mirabilite) or a placebo plaster, respectively. Both courses of treatment lasted from the day 1 of CD, followed day 2 until discharge. The primary outcome was the total number of patients with superficial, deep and organ/space SSI. The secondary outcome was duration of postoperative hospital stay, antibiotic intake, and unplanned readmission or reoperation due to SSI. All reported efficacy and safety outcomes were confirmed by a central adjudication committee that was unaware of the study-group assignments.
		                        		
		                        			RESULTS:
		                        			During the recovery process after CD, the rates of localized swelling, redness and heat were significantly lower in the CM group than in the placebo group [7.55% (20/265) vs. 17.21% (47/274), P<0.01]. The durution of postoperative antibiotic intake was shorter in the CM group than in the placebo group (P<0.01). The duration of postoperative hospital stay was significantly shorter in the CM group than in the placebo group (5.49 ± 2.68 days vs. 8.96 ± 2.35 days, P<0.01). The rate of postoperative C-reactive protein elevation (≽100 mg/L) was lower in the CM group than in the placebo group [27.6% (73/265) vs. 43.8% (120/274), P<0.01]. However, there was no difference in purulent drainage rate from incision and superficial opening of incision between the two groups. No intestinal reactions and skin allergies were found in the CM group.
		                        		
		                        			CONCLUSIONS
		                        			CM plaster containing rhubarb and mirabilite had an effect on SSI. It is safe for mothers and imposes lower economic and mental burdens on patients undergoing CD. (Registration No. ChiCTR2100054626).
		                        		
		                        		
		                        		
		                        			Pregnancy
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Surgical Wound Infection/etiology*
		                        			;
		                        		
		                        			Medicine, Chinese Traditional
		                        			;
		                        		
		                        			Anti-Bacterial Agents/therapeutic use*
		                        			;
		                        		
		                        			Cesarean Section/adverse effects*
		                        			;
		                        		
		                        			Double-Blind Method
		                        			;
		                        		
		                        			Treatment Outcome
		                        			
		                        		
		                        	
8.Elective incisional hernia repair: lower risk of postoperative wound infection with laparoscopic versus open repair.
Serene Si Ning GOH ; Kaushal Amitbhai SANGHVI ; Aaryan Nath KOURA ; Jaideepraj Krishnaraj RAO ; Aung Myint OO
Singapore medical journal 2023;64(2):105-108
		                        		
		                        			INTRODUCTION:
		                        			The superiority of laparoscopic repair over open repair of incisional hernias (IHs) in the elective setting is still controversial. Our study aimed to compare the postoperative outcomes of laparoscopic and open elective IH repair in an Asian population.
		                        		
		                        			METHODS:
		                        			This retrospective study was conducted in an acute general hospital in Singapore between 2010 and 2015. Inclusion criteria were IH repair in an elective setting, IHs with diameter of 3-15 cm, and location at the ventral abdominal wall. We excluded patients who underwent emergency repair, had recurrent hernias or had loss of abdominal wall domain (i.e. hernia sac containing more than 30% of abdominal contents or any solid organs). Postoperative outcomes within a year such as recurrence, pain, infection, haematoma and seroma formation were compared between the two groups.
		                        		
		                        			RESULTS:
		                        			There were 174 eligible patients. The majority were elderly Chinese women who were overweight. Open repair was performed in 49.4% of patients, while 50.6% underwent laparoscopic repair. The mean operation time for open repair was 116 minutes (116 ± 60.6 minutes) and 139 minutes (136 ± 64.1 minutes) for laparoscopic repair (P = 0.079). Within a year after open repair, postoperative wound infection occurred in 15.1% of the patients in the open repair group compared to 1.1% in the laparoscopic group (P = 0.0007). Postoperative pain, recurrence and haematoma/seroma formation were comparable.
		                        		
		                        			CONCLUSION
		                        			Elective laparoscopic IH repair has comparable outcomes with open repair and may offer the advantage of reduced postoperative wound infection rates.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Female
		                        			;
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Incisional Hernia/surgery*
		                        			;
		                        		
		                        			Surgical Wound Infection/epidemiology*
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Seroma/surgery*
		                        			;
		                        		
		                        			Herniorrhaphy/adverse effects*
		                        			;
		                        		
		                        			Surgical Mesh
		                        			;
		                        		
		                        			Recurrence
		                        			;
		                        		
		                        			Hernia, Ventral/surgery*
		                        			;
		                        		
		                        			Laparoscopy/adverse effects*
		                        			;
		                        		
		                        			Postoperative Complications/surgery*
		                        			
		                        		
		                        	
9.Comparison of safety of total laparoscopic versus laparoscopic-assisted radical gastrectomy for distal gastric cancer in older patients.
Zhi Jie DU ; Zhou Qiao WU ; Fei SHAN ; Ying Ai LI ; Fei PANG ; Zi Yu LI ; Jia Fu JI
Chinese Journal of Gastrointestinal Surgery 2023;26(2):167-174
		                        		
		                        			
		                        			Objective: To compare the effectiveness of total laparoscopic versus laparoscopic-assisted distal gastrectomy and investigate the safety and replicability of total laparoscopic distal gastrectomy in older patients. Methods: This was a retrospective cohort study. The inclusion criteria were as follows: (1) age ≥65 years; (2) malignant gastric tumor diagnosed pathologically preoperatively; (3) Eastern Cooperative Oncology Group performance status score 0-1; (4) Grade I-III American Society of Anesthesiologists physical status; (5) preoperative clinical tumor stage I-III; (6) total laparoscopic or laparoscopic-assisted distal gastrectomy performed; and (7) gastrointestinal tract reconstruction using uncut Roux-en-Y or Billroth-II+Braun procedure. Patients who had received neoadjuvant therapy, undergone conversion to open surgery, or had serious comorbidities or incomplete data were excluded. The clinical data of 129 patients who met the above criteria and had undergone laparoscopic surgery for gastric cancer from January 2012 to December 2021 in the Gastrointestinal Cancer Center in the Beijing Cancer Hospital were analyzed. According to the operation method, the patients were divided into total laparoscopic group and laparoscopic-assisted group. Variables studied comprised: (1) surgical procedure and postoperative recovery; (2) postoperative pathological findings; and (3) postoperative complications. Measurement data with skewed distribution are represented as mean(quartile 1, quartile 3). Comparisons between groups were evaluated using the Mann-Whitney U test. Results: After propensity score matching in a 1:1 ratio, there were 40 patients in the total laparoscopic distal gastrectomy group and 40 in the laparoscopic-assisted distal gastrectomy group. Baseline characteristics did not differ significantly between the two groups (all P>0.05).Compared with the laparoscopic-assisted group, the total laparoscopic group had shorter main incisions (4.1±1.0 cm vs. 8.5±2.8 cm, t=9.375, P<0.001), time to fluid intake [4.0 (3.0, 4.8) days vs. 5.0 (4.0, 6.0) days, Z=2.167, P=0.030], and duration of indwelling abdominal drainage catheter [6.0 (6.0, 7.0) days vs. 7.0 (6.0, 8.0) days, Z=2.323, P=0.020]. Numerical Rating Scale scores on postoperative days 1 and 2 were higher in the total laparoscopic than the laparoscopic-assisted group [2.5 (1.0, 3.0) vs. 1.5 (1.0, 2.0), Z=1.980, P=0.048; 2.0 (1.0, 3.0) vs. 1.0 (1.0, 2.0), Z=2.334, P=0.020, respectively]. However, there were no significant differences between the groups in operation time, intraoperative blood loss, white blood cell count, hemoglobin concentration, or albumin concentration on postoperative day 1, time to ambulation, mean time to bowel movement, postoperative admission to the intensive care unit, length of postoperative hospital stay, or Numerical Rating Scale scores on postoperative day 3 (all P>0.05). There were also no significant differences between the two groups in maximum tumor diameter, pathological tumor type, total number of lymph nodes dissected, or total number of positive lymph nodes (all P>0.05). The incidence of postoperative complications was 15.0% (6/40) in the total laparoscopic group and the laparoscopic-assisted group; these differences are not significant (χ2<0.001, P>0.999). Conclusions: Compared with laparoscopic-assisted radical gastrectomy for distal gastric cancer, total laparoscopic surgery has the advantages of shorter incision, shorter time to fluid intake, and shorter duration of indwelling abdominal drainage catheter in older patients (age ≥65 years). Total laparoscopic radical gastrectomy for distal gastric cancer does not increase the risk of postoperative complications and could therefore be performed more frequently.
		                        		
		                        		
		                        		
		                        			Aged
		                        			;
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Gastrectomy/methods*
		                        			;
		                        		
		                        			Laparoscopy/methods*
		                        			;
		                        		
		                        			Postoperative Complications
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Stomach Neoplasms/pathology*
		                        			;
		                        		
		                        			Surgical Wound
		                        			;
		                        		
		                        			Treatment Outcome
		                        			
		                        		
		                        	
10.Early effectiveness of computer navigation system-assisted transiliac-transsacral screws placement for posterior pelvic ring injuries.
Wenhao CAO ; Zhengguo ZHU ; Hongzhe QI ; Junjun TANG ; Wei ZHANG ; Jiaqi LI ; Shuangcheng LI ; Zhonghe WANG ; Changda LI ; Feng ZHOU ; Haoyang LIU ; Hua CHEN ; Peifu TANG
Chinese Journal of Reparative and Reconstructive Surgery 2023;37(9):1049-1054
		                        		
		                        			OBJECTIVE:
		                        			To investigate the early effectiveness of transiliac-transsacral screws internal fixation assisted by augmented reality navigation system HoloSight (hereinafter referred to as "computer navigation system") in the treatment of posterior pelvic ring injuries.
		                        		
		                        			METHODS:
		                        			A retrospective analysis was made in the 41 patients with posterior pelvic ring injuries who had been treated surgically with transiliac-transsacral screws between June 2022 and June 2023. The patients were divided into navigation group (18 cases, using computer navigation system to assist screw implantation) and freehand group (23 cases, using C-arm X-ray fluoroscopy to guide screw implantation) according to the different methods of transiliac-transsacral screws placement. There was no significant difference in gender, age, body mass index, causes of injuries, Tile classification of pelvic fracture, days from injury to operation, usage of unlocking closed reduction technique between the two groups ( P>0.05). The time of screw implantation, the fluoroscopy times, the guide wire adjustment times of each screw, and the incidence of complications were recorded and compared between the two groups. The position of the transiliac-transsacral screw was scanned by CT within 2 days after operation, and the position of the screw was classified according to Gras standard.
		                        		
		                        			RESULTS:
		                        			The operation was successfully completed in both groups. The time of screw implantation, the fluoroscopy times, and the guide wire adjustment times of each screw in the navigation group were significantly less than those in the freehand group ( P<0.05). There were 2 cases of incision infection in the freehand group, and the incision healed by first intention after active dressing change; there was no screw-related complication in the navigation group during operation and early period after operation; the difference in incidence of complications between the two groups (8.7% vs. 0) was not significant ( P=0.495). According to the Gras standard, the screw position of the navigation group was significantly better than that of the freehand group ( P<0.05).
		                        		
		                        			CONCLUSION
		                        			Compared with the traditional freehand method, the computer navigation system assisted transiliac-transsacral screws internal fixation in the treatment of posterior pelvic ring injuries has advantages of improving the accuracy of screw implantation and reducing radiation damage and the time of screw implantation.
		                        		
		                        		
		                        		
		                        			Humans
		                        			;
		                        		
		                        			Retrospective Studies
		                        			;
		                        		
		                        			Surgical Wound Infection
		                        			;
		                        		
		                        			Replantation
		                        			;
		                        		
		                        			Body Mass Index
		                        			
		                        		
		                        	
            

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