Quantitative magnetic resonance imaging vs. perioperative arthroscopy to measure stage 1 ruptures of the supraspinatus tendon for surgical planning.

BACKGROUND: Accurate preoperative assessment of supraspinatus tendon tear (STT) size is important for surgical planning. Our aims were to evaluate the correlation between stage 1 STT size measured preoperatively by quantitative magnetic resonance imaging (qMRI) and size measured perioperatively by arthroscopy. The concordance between preoperative tear size and the surgical plan was also assessed. METHODS: This prospective, nonrandomized, noncontrolled, interventional study was carried out in patients with a stable stage 1 STT. Three months before surgery, STT size was measured in the sagittal and coronal planes by a radiologist by qMRI (1.5 T). Three months later, the surgeon measured the size of the tear again on the same qMRI scans and decided on the most appropriate surgical plan. During arthroscopy, the surgeon measured the size of the tear again using a graduated sensor hook and carried out the repair. STT size measured preoperatively was compared to that measured by arthroscopy and the concordance between preoperative STT size and the surgical plan was determined. RESULTS: Sixty-seven patients were included (mean age: 59.5 ± 8.9 years; 58.2% female). There was good concordance between STT size measured by qMRI vs. arthroscopy in the coronal plane (concordance correlation coefficient = 0.36 [95% confidence interval (CI): 0.16-0.53]; Pearson's correlation coefficient = 0.42 [95% CI: 0.2-0.6]; P = .0004) and in the sagittal plane (concordance correlation coefficient = 0.51 [95% CI: 0.33-0.65]; Pearson's correlation coefficient = 0.57 [95% CI: 0.38-0.71]; P < .0001). Preoperative STT size concurred with the surgical plan in 85% of patients. CONCLUSION: There was good concordance between STT size measured by qMRI and that measured perioperatively by arthroscopy. However, preoperative STT size measured by qMRI did not concur with the surgical plan in 15% of patients and in these patients the surgical procedure had to be revised during surgery.

Machine learning-based decision support system for orthognathic diagnosis and treatment planning.

BACKGROUND: Dento-maxillofacial deformities are common problems. Orthodontic-orthognathic surgery is the primary treatment but accurate diagnosis and careful surgical planning are essential for optimum outcomes. This study aimed to establish and verify a machine learning-based decision support system for treatment of dento-maxillofacial malformations. METHODS: Patients (n = 574) with dento-maxillofacial deformities undergoing spiral CT during January 2015 to August 2020 were enrolled to train diagnostic models based on five different machine learning algorithms; the diagnostic performances were compared with expert diagnoses. Accuracy, sensitivity, specificity, and area under the curve (AUC) were calculated. The adaptive artificial bee colony algorithm was employed to formulate the orthognathic surgical plan, and subsequently evaluated by maxillofacial surgeons in a cohort of 50 patients. The objective evaluation included the difference in bone position between the artificial intelligence (AI) generated and actual surgical plans for the patient, along with discrepancies in postoperative cephalometric analysis outcomes. RESULTS: The binary relevance extreme gradient boosting model performed best, with diagnostic success rates > 90% for six different kinds of dento-maxillofacial deformities; the exception was maxillary overdevelopment (89.27%). AUC was > 0.88 for all diagnostic types. Median score for the surgical plans was 9, and was improved after human-computer interaction. There was no statistically significant difference between the actual and AI- groups. CONCLUSIONS: Machine learning algorithms are effective for diagnosis and surgical planning of dento-maxillofacial deformities and help improve diagnostic efficiency, especially in lower medical centers.

Use of a 3D reconstruction model in a patient with severe atresia auris for optimal placement of Bonebridge transcutaneous bone conduction implant.

PURPOSE: Patients affected by severe atresia auris (AA) can be a challenge during hearing restoration surgery due to the abnormal position of vascular and nervous structures in the bone. A 3D reconstruction model of malformed temporal bones can be helpful for planning surgery and optimizing intra-, peri-, and post-operative results. METHOD: A 5-year-old girl with severe AA on the right side was implanted with a Bonebridge transcutaneous bone conduction implant (tBCI). 3D printing was used to reproduce the malformed temporal bone, find a good position for the tBCI and plan out the surgical details in advance. Hearing tests were performed before and after surgery and information about intra-, peri-, and post-operative outcomes were collected. RESULTS: The patient did not show any negative outcomes and, thanks to the Bonebridge, completely recovered hearing on the right side. CONCLUSIONS: 3D printing is a useful tool for planning surgery in AA patients and for preventing possible risks related to the unknown malformed anatomy.

Efficacy of breast MRI for surgical decision in patients with breast cancer: ductal carcinoma in situ versus invasive ductal carcinoma.

BACKGROUND: Preoperative breast magnetic resonance imaging (MRI) provides more information than mammography and ultrasonography for determining the surgical plan for patients with breast cancer. This study aimed to determine whether breast MRI is more useful for patients with ductal carcinoma in situ (DCIS) lesions than for those with invasive ductal carcinoma (IDC). METHODS: A total of 1113 patients with breast cancer underwent mammography, ultrasonography, and additional breast MRI before surgery. The patients were divided into 2 groups: DCIS (n = 199) and IDC (n = 914), and their clinicopathological characteristics and oncological outcomes were compared. Breast surgery was classified as follows: conventional breast-conserving surgery (Group 1), partial mastectomy with volume displacement (Group 2), partial mastectomy with volume replacement (Group 3), and total mastectomy with or without reconstruction (Group 4). The initial surgical plan (based on routine mammography and ultrasonography) and final surgical plan (after additional breast MRI) were compared between the 2 groups. The change in surgical plan was defined as group shifting between the initial and final surgical plans. RESULTS: Changes (both increasing and decreasing) in surgical plans were more common in the DCIS group than in the IDC group (P <  0.001). These changes may be attributed to the increased extent of suspicious lesions on breast MRI, detection of additional daughter nodules, multifocality or multicentricity, and suspicious findings on mammography or ultrasonography but benign findings on breast MRI. Furthermore, the positive margin incidence in frozen biopsy was not different (P = 0.138). CONCLUSIONS: Preoperative breast MRI may provide more information for determining the surgical plan for patients with DCIS than for those with IDC.

Strengthening surgical healthcare research capacity in sub-Saharan Africa: impact of a research training programme in Nigeria.

Background: Limited research capacity has contributed to the lack of high-quality research from low-and middle-income countries. This is compounded by limited research training opportunities. Research capacity scale-up training was deployed as part of the implementation of the National Surgical, Obstetrics, Anaesthesia, and Nursing Plan for Nigeria. We report the impact of this locally contextualized efforts to scale up research capacity in sub-Saharan Africa. Methods: This is an evaluation of the training of 65 participants in research, grant writing and manuscript writing and publication. Pre- and post-training surveys using a 5-point Likert scale and open-ended questions were administered to evaluate the impact of the programme. Results: There were 39 (60%) males and 26 (40%) females aged 26-62 years (median 42 years). Thirty-nine (60%) participants had previous training in research, but only 12 (18.5%) had previously received grant writing training, and 17 (26.2%) had previously received manuscript writing and publishing training. Following training, 45 (70.3%) participants agreed that the training was relevant. The research, grant writing and manuscript writing, and publication components of the training were rated high by the participants (45-59, 70.3-92.2%). However, 41.2% felt that there was not enough time, and 32.4% felt that the training was too comprehensive. Nearly all the participants agreed that the training had improved their skills in research, grant writing and manuscript writing and publication, and more than two-thirds subsequently engaged in informal mentoring of others. Overall, participants achieved success in designing their own research projects and publishing manuscripts and grants. Three (4.6%) of the participants had gone on to become faculty for the research training programme. The three top barriers encountered following training were time constraints (67.3%), lack of funding (36.5%) and not being able to find research collaborators (25%). Conclusion: Outcome of this training programme is encouraging and highlights the feasibility and potential impact of deploying such programmes in low and middle income countries (LMICs). Despite the positive outcomes, barriers including time constraints, funding limitations, and difficulties in finding research collaborators remain to be addressed. Such training programmes need to be supported to strengthen the research capacity in this and similar settings.

Kinematic-kinetic compliant acetabular cup positioning based on preoperative motion tracking and musculoskeletal modeling for total hip arthroplasty.

The invention of the surgical robot enabled accurate component implantation during total hip arthroplasty (THA). However, a preoperative surgical planning methodology is still lacking to determine the acetabular cup alignment considering the patient-specific hip functions during daily activities such as walking. To simultaneously avoid implant edgeloading and impingement, this study established a kinematic-kinetic compliant (KKC) acetabular cup positioning method based on preoperative gait kinematics measurement and musculoskeletal modeling. Computed tomography images around the hip joint and their biomechanical data during gait, including motion tracking and foot-ground reaction forces, were collected. Using the reconstructed pelvic and femur geometries, the patient-specific hip muscle insertions were located in the lower limb musculoskeletal model via point cloud registration. The designed cup orientation has to be within the patient-specific safe zone to prevent implant impingement, and the optimized value selected based on the time-dependent hip joint reaction force to minimize the risk of edgeloading. As a validation of the proposed musculoskeletal model, the predicted lower limb muscle activations for seven patients were correlated with their surface electromyographic measurements, and the computed hip contact force was also in quantitative agreement with data from the literature. However, the designed cup orientations were not always within the well-known Lewinnek safe zone, highlighting the importance of KKC surgical planning based on patient-specific biomechanical evaluations.

Amyand's hernia combined with contralateral recurrent inguinal hernia: A case report.

INTRODUCTION: Amyand's hernia (AH)-where the appendix becomes incarcerated within the inguinal hernia (IH) sac-is rare, particularly if detected and operated concurrent with a contralateral recurrent IH. PRESENTATION OF CASE: A 65-year-old man presented with symptomatic bilateral IH; the left IH was recurrent. Abdominopelvic computed tomography (CT) revealed a right IH with appendiceal herniation and left recurrent IH with omental fat. Using the prolene hernia system (PHS) mesh, the left recurrent IH underwent operation, followed by the right AH. The patient was in a good state with no recurrence 16 months postsurgery. DISCUSSION: If AH is accidentally encountered during surgery, the procedure should differ depending on the inflammatory state of the appendix. Simultaneously operating AH and contralateral recurrent IH is complicated; it is necessary to preoperatively decide which side to operate on first and whether to use an anterior or laparoscopic posterior surgical approach. If the planned operation is unattainable, alternative surgery should be considered. Fortunately, herein CT was performed prior to surgery, and the surgical plan was properly established. CONCLUSION: Prior to simultaneous AH and contralateral recurrent IH surgery, the surgical plan should be established. If the planned surgical technique for recurrent hernia repair is not feasible, an alternative should be performed. In AH repair, different surgical methods are required depending on the presence and severity of inflammation of the appendix.

Advocating for children's surgery within country health plans: lessons from Nigeria and the global stage.

Background: Despite the growing emphasis on provision of quality safe and affordable surgical care in low- and middle-income countries, and the World Health Assembly resolution 68. 15 on strengthening emergency and essential surgical care and anesthesia as components of universal health coverage, a review of published surgical plans of various countries, revealed a lack of emphasis on children's surgery. Due to the peculiarities of the human resource, infrastructure and equipment required for children's surgery, a lack of deliberate actions and policies targeted at strengthening surgical care for children implies that achieving universal health coverage for children may not be a reality in this setting. Methods: A baseline assessment of children's surgical capacity was conducted in Nigeria as a part of the National Surgical Obstetrics Anesthesia and Nursing Plan (NSOANP) process. The assessment was done using the World Health Organization (WHO) hospital assessment tool modified for children's surgery (Children Surgical Assessment Tool). Results: Significant infrastructural gaps were found, with an abysmally low density of pediatric surgeons and anaesthesiologists, poor emergency preparedness, lack of reliable surgical data and non-inclusion of children's surgery in the national strategic health plan. Using the Global Initiative for Children's Surgery's (GICS) Optimal Resources for Children's Surgical Care (OReCS) document and focusing on the strategic goals and priorities, children's surgery was incorporated into the NSOANP. Implementation of the plan is currently ongoing. Conclusion: From Nigeria's experience, appropriate advocacy and inclusion of children surgery providers in policy making will promote prioritization of children's surgery in country health and surgical plans.

From "Empirical Surgery" to "Precision Surgery": establishment and clinical application of precision orthognathic surgery system.

Orthognathic surgery, which involve osteotomy and repositioning of the maxillomandibular complex, has recently emerged as a crucial method of correcting dentofacial deformities. The optimal placement of the maxillomandibular complex holds utmost significance during orthognathic surgery because it directly affects the surgical outcome. To accurately achieve the ideal position of the maxillomandibular complex, with the rapid advancements in digital surgery and 3D-printing technology, orthognathic surgery has entered an era of "Precision Surgery" from the pervious "Empirical Surgery." This article provides comprehensive insights into our extensive research and exploration of the treatment modality known as "precision orthognathic surgery" over the years. We also present the technical system and application in"Ortho+X" treatment modality to offer valuable references and assistance to our colleagues in the field.

Surgical accuracy of CAD/CAM splints using virtual surgical planning in orthognathic surgery: policy implications for healthcare in Australia.

BACKGROUND: This study examines post-surgical outcomes of maxillary position using virtual surgical planning (VSP) with computer designed and manufactured surgical splints, without the use of costly patient specific implants (PSI), in the treatment of routine nonsyndromic orthognathic patients. The cost of these personalized medical devices and their impact in the setting of cranio-maxillofacial surgery is currently under review by The Department of Health and Aged Care in Australia. METHODS: This is a single-centre retrospective analysis of 49 patients who underwent bimaxillary orthognathic surgery by a single surgeon at Epworth Richmond Hospital (Victoria, Australia) over a period spanning 2016 to 2020. Patients were included in the study provided their surgery was facilitated using VSP with manufacture of computer designed occlusal splints. RESULTS: Use of computer designed and manufactured splints were highly reliable in reproducing the virtual surgical plan, when using palatal plane, upper incisor angulation, and anterior upper facial height. CONCLUSION: Use of computer designed and manufactured splints provide a method of leveraging the accuracy of VSP methods, without the additional costs associated with PSI. These findings may assist in appropriate resource allocation and case stratification in patients undergoing orthognathic surgery.

Surgical Management for Vertical Maxillary Excess.

Orthognathic surgery is an effective approach to correct vertical maxillary excess (VME), which is a common maxillofacial deformity and exhibits excessive vertical development of maxilla. This review summarizes different clinical features of total, anterior and posterior VME, as well as corresponding surgical managements guided by preoperative computer-assisted surgical planning. The virtual simulation will do favor to the final determination of individual surgical plans to achieve satisfactory outcomes. Finally, a typical clinical case will be presented to demonstrate the surgical management of VME.

Quantitative Assessment of the Restoration of Original Anatomy after 3D Virtual Reduction of Long Bone Fractures.

Background: The purpose of this study was to demonstrate the usefulness of 3D image-based virtual reduction by validating the evaluation criteria according to guidelines suggested by the AO Surgery Reference. Methods: For this experiment, 19 intact radial ORTHObones (ORTHObones radius, 3B Scientific, Germany, Hamburg) without any fractures were prepared. All ORTHObones with six cortical marking holes (three points on the distal part and three points on the proximal part) were scanned using a CT scanner twice (before/after intentional fracture of the ORTHObone). After the virtual reduction of all 19 ORTHObones, accuracy evaluations using the four criteria (length variation, apposition variation, alignment variation, Rotation Variation) suggested in the AO Surgery Reference were performed. Results: The mean (M) length variation was 0.42 mm, with 0.01 mm standard deviation (SD). The M apposition variation was 0.48 mm, with 0.40 mm SD. The M AP angulation variation (for alignment variation) was 3.24°, with 2.95° SD. The M lateral angulation variation (for alignment variation) was 0.09°, with 0.13° SD. The M angle of axial rotation was 1.27° with SD: 1.19°. Conclusions: The method of accuracy evaluation used in this study can be helpful in establishing a reliable plan.

Application of three-dimensional visualization technology in laparoscopic pyeloplasty for ureteropelvic junction obstruction caused by crossing vessels: a retrospective comparative cohort study.

Background: Ureteropelvic junction obstruction (UPJO) caused by crossing vessels is a common upper urinary tract abnormal development in which the vessels compress the upper segment of the ureter leading to different grades of hydronephrosis. Compared with routine computed tomography (CT) examination, three-dimensional visualization technology (3DVT) can help surgeons better understand the anatomical structure of the target surgical area. The aim of this study was to investigate the clinical value of 3DVT for the diagnosis, preoperative surgical planning, perioperative outcomes, and patient education of UPJO caused by crossing vessels. Methods: In this study, we retrospectively analyzed the clinical data of 28 patients who were admitted to the Department of Urology in Xiangya Hospital between January 2016 and December 2021 presenting with UPJO caused by crossing vessel compression. Among the 28 patients included, 13 patients underwent preoperative 3DVT and 15 patients underwent routine computed tomography (CT) scans. After the initial evaluation, all patients received standardized dismembered LP. The 2 groups of patients were compared in terms of demographic parameters, intraoperative data, and perioperative results. After surgery, all patients were asked to complete a Likert scale questionnaire to gain insight into their understanding of the disease and surgery, as well as their satisfaction with the use of different imaging techniques. Results: There were no statistically significant differences in age, gender, body mass index (BMI), side of obstruction, blood vessel compressing the ureteropelvic junction (UPJ), mean duration of hospitalization, and surgical efficacy between the 2 groups. However, the 3DVT group experienced a significant reduction in operation duration (120.8±7.0 versus 144.0±7.9 min, P=0.039), time required for dismemberment of the UPJ (14.8±1.7 versus 24.0±2.2 min, P=0.004), and the amount of intraoperative blood loss (60.8±10.5 versus 95.3±11.9 mL, P=0.041). The 3DVT group was also notably superior to the conventional CT group in terms of the overall levels of patient satisfaction and understanding of the disease and surgery. Conclusions: 3DVT is a helpful preoperative examination tool which can clearly show the anatomical relationship between crossing vessels and the UPJ. In addition, 3DVT can also help patients better understand their conditions and surgical plans, thereby improving patient satisfaction.

Does the use of a "wrap" in three-dimensional surgical planning influence the bony margin status of benign and malignant neoplasms of the oral, head, and neck region? An initial investigation.

PURPOSE: Three-dimensional surgical planning (3-DSP) is becoming commonplace in the management of benign and malignant disease for oral and maxillofacial surgery practice within the last decade. Surgeons utilize a virtual "wrap" to preoperatively delineate and define maxillofacial tumor resection margins. The investigators hypothesized that the use of a wrap is a predictable method to obtain negative bony margins. METHODS: The investigators implemented a retrospective chart review. The sample was composed of patients over the age of 18 treated at John Peter Smith Health Network and Parkland/UT Southwestern Medical Center who obtained 3-DSP for the pathology of the head and neck, involving the bone, with a virtual wrap utilized for bony margins. The proportion of cases was calculated, descriptive statistics were reported, and binomial exact calculation was performed for confidence intervals. The primary variable analyzed was bony margin status on final histopathology, involved or uninvolved, based on the pathology report. RESULTS: The sample was composed of 39 cases, one of which was excluded due to aborting the preplanned 3-DSP. Of the 38 included cases, one had involved bony margin on final histopathology (2.6%; 95% confidence limits, 0.1%, 13.8%). There were 16 malignant cases (42%) and 22 benign cases (58%). When stratified by pathology, 1 out of the 16 malignant cases (6.3%; 95% confidence interval, 0.2%, 30%) and 0 out of the 22 benign cases (95% confidence interval, 0%, 15.4%) had an involved bony margin on final histopathology. CONCLUSION: The results of this preliminary study suggest three-dimensional surgical planning with wrap margins is a predictable method to obtain negative bony margins in benign and malignant disease of the maxillofacial complex. Further studies will focus on compiling prospective data to solidify the accuracy and predictability of using a wrap to obtain negative bony margins.

Sinus of Valsalva Rupture or VSD Shunt: Mystery Solved by Cardiac CT.

Unruptured aneurysm of sinus of Valsalva is an asymptomatic pathology and diagnosed incidentally. This extremely rare anomaly can be associated with other congenital cardiac anomalies which can make the diagnosis and prognosis even more complex. We are reporting a case of a 12-year-old boy with progressive dyspnea and episodes of syncope. Multimodality imaging confirmed the diagnosis and paved the way for appropriate surgical treatment options.

Accuracy of Mixed Reality Combined With Surgical Navigation Assisted Oral and Maxillofacial Tumor Resection.

OBJECTIVE: To evaluate the feasibility and accuracy of mixed reality combined with surgical navigation in oral and maxillofacial tumor surgery. METHODS: Retrospective analysis of data of seven patients with oral and maxillofacial tumors who underwent surgery between January 2019 and January 2021 using a combination of mixed reality and surgical navigation. Virtual surgical planning and navigation plan were based on preoperative CT datasets. Through IGT-Link port, mixed reality workstation was synchronized with surgical navigation, and surgical planning data were transferred to the mixed reality workstation. Osteotomy lines were marked with the aid of both surgical navigation and mixed reality images visualized through HoloLens. Frozen section examination was used to ensure negative surgical margins. Postoperative CT datasets were obtained 1 week after the surgery, and chromatographic analysis of virtual osteotomies and actual osteotomies was carried out. Patients received standard oncological postoperative follow-up. RESULTS: Of the seven patients, four had maxillary tumors and three had mandibular tumors. There were total of 13 osteotomy planes. Mean deviation between the planned osteotomy plane and the actual osteotomy plane was 1.68 ± 0.92 mm; the maximum deviation was 3.46 mm. Chromatographic analysis showed error of ≤3 mm for 80.16% of the points. Mean deviations of maxillary and mandibular osteotomy lines were approximate (1.60 ± 0.93 mm vs. 1.86 ± 0.93 mm). While five patients had benign tumors, two had malignant tumors. Mean deviations of osteotomy lines was comparable between patients with benign and malignant tumors (1.48 ± 0.74 mm vs. 2.18 ± 0.77 mm). Intraoperative frozen pathology confirmed negative resection margins in all cases. No tumor recurrence or complications occurred during mean follow-up of 15.7 months (range, 6-26 months). CONCLUSION: The combination of mixed reality technology and surgical navigation appears to be feasible, safe, and effective for tumor resection in the oral and maxillofacial region.

PSI-Guided Mandible-First Orthognathic Surgery: Maxillo-Mandibular Position Accuracy and Vertical Dimension Adjustability.

In orthognathic surgery, patient-specific osteosynthesis implants (PSIs) represent a novel approach for the reproduction of the virtual surgical planning on the patient. The aim of this study is to analyse the quality of maxillo-mandibular positioning using a hybrid mandible-first mandibular-PSI-guided procedure on twenty-two patients while the upper maxilla was fixed using manually bent stock titanium miniplates. The virtual surgical plan was used to design PSIs and positioning guides, which were then 3D printed using biocompatible materials. A Cone Beam Computed Tomography (CBCT) scan was performed one month after surgery and postoperative facial skeletal models were segmented for comparison against the surgical plan. A three-dimensional cephalometric analysis was carried out on both planned and obtained anatomies. A Spearman correlation matrix was computed on the calculated discrepancies in order to achieve a more comprehensive description of maxillo-mandibular displacement. Intraoperatively, all PSIs were successfully applied. The procedure was found to be accurate in planned maxillo-mandibular positioning reproduction, while maintaining a degree of flexibility to allow for aesthetics-based verticality correction in a pitch range between -5.31 and +1.79 mm. Such a correction did not significantly affect the achievement of planned frontal symmetry.

Initial experiences with preoperative three-dimensional image reconstruction technology in laparoscopic pyeloplasty for ureteropelvic junction obstruction.

BACKGROUND: To explore the clinical value of three-dimensional image reconstruction technology (3DIT) on preoperative surgical planning and perioperative outcomes in laparoscopic pyeloplasty (LP). METHODS: Data of 25 patients with ureteropelvic junction obstruction (UPJO) admitted to our hospital from January 2018 to January 2019 was analyzed retrospectively. All patients underwent preoperative enhanced computed tomography (CT) scanning. In the 12 cases in the 3DIT group, preoperative planning involved the use of virtual operation and morphometry based on reconstruction of the CT data into three-dimensional (3D) images. Surgery in the other 13 cases was performed with traditional CT examination. Demographic, surgical outcome, and postoperative parameters were compared between these two groups. RESULTS: Reconstructed 3D images clearly showed the spatial structural relationships between the UPJO and surrounding blood vessels. In all 25 cases surgery was completed with no conversion to open surgery. Preoperative 3DIT analyses resulted in significant improvements to mean operation time (107.76 vs. 141.58 min, P=0.024), mean time of dissociating ureteropelvic junction (UPJ) (11.26 vs. 19.40 min, P=0.020), and mean estimated blood loss volume (23.84 vs. 49.16 mL, P=0.028). There were no statistically significant differences in perioperative complications, postoperative hospital stays or postoperative drainage time. CONCLUSIONS: 3DIT based on enhanced CT scans is of clinical value in the treatment of UPJO, as it can provide accurate anatomical information and reliable guidance for preoperative operation planning, and it facilitates image-guided LP.

The Application of Preoperative Three-Dimensional Reconstruction Visualization Digital Technology in the Surgical Treatment of Hepatic Echinococcosis in Tibet.

Objective: The present study aims to explore the application value of three-dimensional (3D) reconstruction technology in the preoperative evaluation of patients with complicated hepatic echinococcosis in Tibet. Methods: A total of 200 patients with complicated hepatic echinococcosis, admitted to our hospital between May 2019 and December 2020, who underwent radical hepatectomy, were enrolled in the present study. The patients were randomly divided into a preoperative computer tomography group and a preoperative 3D reconstruction group. According to the imaging results, a surgical plan was formulated. A comparison was made between the two groups of the coincidence rate of the surgical plan and intraoperative and postoperative complications. Results: The patients with hepatic echinococcosis who underwent 3D visualization reconstruction before surgery had a high compliance rate with the surgical plans and the operating time, the number of cases with blood flow blockage, the blood flow blockage time, intraoperative hemorrhage, and postoperative biliary fistulas were significantly lower. Conclusion: The application of preoperative 3D visualization reconstruction in patients with complicated hepatic echinococcosis in Tibet could effectively improve surgical safety.

Corrigendum: The Application of Preoperative Three-Dimensional Reconstruction Visualization Digital Technology in the Surgical Treatment of Hepatic Echinococcosis in Tibet.

[This corrects the article DOI: 10.3389/fsurg.2021.715005.].