Surgical Techniques Development

14 pages, 1936 KB

Open AccessTechnical Note

ROSA™ Imageless Robotic-Assisted Conversion from Unicompartmental to Total Knee Arthroplasty: A Novel Surgical Technique and Case Report

by Elisabetta Giani, Ilaria Morelli, Susanna Gadda Sanzo, Andrea F. Fusaro, Alessandro Ivone, Giacomo Galanzino and Roberto E. Vanelli

Surg. Tech. Dev. 2026, 15(1), 13; https://doi.org/10.3390/std15010013 - 17 Mar 2026

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Abstract

Background: Unicompartmental knee arthroplasty (UKA) is an effective treatment for isolated compartment knee osteoarthritis, but it is associated with a higher risk of revisions. UKA-to-TKA conversions remain surgically challenging. In particular, the restoration of correct femoral rotation is difficult, mainly because of bone [...] Read more.

Background: Unicompartmental knee arthroplasty (UKA) is an effective treatment for isolated compartment knee osteoarthritis, but it is associated with a higher risk of revisions. UKA-to-TKA conversions remain surgically challenging. In particular, the restoration of correct femoral rotation is difficult, mainly because of bone loss and altered anatomical landmarks. We describe a novel imageless robotic-assisted technique for UKA-to-TKA conversion using the ROSA™ robotic system and report a representative clinical case. Methods: After a standard medial parapatellar approach and joint exposure, the landmarks are registered with the UKA in situ, followed by the standard workflow for a robotic-assisted primary TKA according to the “inverse functional alignment” philosophy (virtual planning, tibial cut, planning adjustment, distal femoral cut and planning adjustment). At last, the femoral component rotation is defined using the FuZion^® tensioner, with the UKA femoral component being left in situ to compensate for the lateral posterior condyle bone loss. Results: A 72-year-old female patient underwent robotic-assisted lateral UKA-to-TKA conversion due to aseptic loosening of the tibial component. Accurate bone resection, restoration of alignment, and soft tissue balancing were achieved, avoiding the use of augments. Postoperative recovery was uneventful, with satisfactory clinical and functional outcomes at 3-month follow-up. Conclusions: Imageless robotic-assisted UKA-to-TKA conversion using the ROSA™ system seems a valuable aid in these complex scenarios. To our knowledge, this is the second report describing this procedure using the ROSA™ robot and the first presenting a distinct surgical technique. Further studies on larger cohorts are needed to confirm this technique efficacy and possible limitations. Full article

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14 pages, 263 KB

Open AccessArticle

The Feasibility of Uniportal Video-Assisted Thoracic Surgery in Octogenarians: A Propensity-Matched Comparative Analysis

by Fahim Kanani, Leonardo Chamovitz, Rijini Nugzar, Mohammad Mohtaseb, Anas Salhab, Mordechai Shimonov and Firas Abu Akar

Surg. Tech. Dev. 2026, 15(1), 12; https://doi.org/10.3390/std15010012 - 17 Mar 2026

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Abstract

Objectives: To evaluate the short-term safety (30-day and in-hospital morbidity and mortality) and technical feasibility of uniportal video-assisted thoracic surgery (U-VATS) for anatomical lung resection in octogenarians (≥80 years) compared with younger patients (<80 years) at a single center. Methods: Ninety consecutive patients [...] Read more.

Objectives: To evaluate the short-term safety (30-day and in-hospital morbidity and mortality) and technical feasibility of uniportal video-assisted thoracic surgery (U-VATS) for anatomical lung resection in octogenarians (≥80 years) compared with younger patients (<80 years) at a single center. Methods: Ninety consecutive patients undergoing U-VATS anatomical lung resections between January 2020 and January 2024 were retrospectively analyzed. Patients were stratified by age: 60 patients < 80 years and 30 octogenarians ≥ 80 years. Propensity score matching (nearest-neighbor, 1:2 ratio, caliper 0.2 SD) yielded a matched cohort of 60 patients (40 younger, 20 octogenarians) for comparative analysis. Results: After matching, standardized mean differences (SMD) were <0.25 for most covariates, indicating good balance. Octogenarians demonstrated lower FEV1 (75.2 ± 15.3% vs. 87.5 ± 18.2%, p = 0.012) and DLCO (68.4 ± 12.1% vs. 78.5 ± 14.3%, p = 0.009), consistent with age-related pulmonary changes. Charlson Comorbidity Index was higher (5.3 ± 1.2 vs. 3.8 ± 1.4, p = 0.001). Surgical parameters were comparable: operative time (143.80 ± 42.3 vs. 136.55 ± 38.7 min, p = 0.524), blood loss (median 80 [IQR 50–120] vs. 95 [IQR 60–130] mL, p = 0.742). Zero conversions occurred. Major complications (Clavien–Dindo ≥ 3) occurred in 10% vs. 0% (absolute risk difference 10%, 95% CI: −3.2% to 23.2%). No 30-day mortality. 90-day mortality: 5% vs. 0% (p = 0.333); one-year: 15% vs. 0% (p = 0.035). Conclusions: U-VATS is technically feasible in carefully selected octogenarians with comparable intraoperative parameters to younger patients. Postoperative recovery differed meaningfully, with higher delirium rates, longer hospitalization, and greater rehabilitation needs. One-year mortality was higher in octogenarians, reflecting competing comorbid risk rather than surgical harm. Residual imbalance in comorbidity burden and pulmonary reserve after matching limits causal inference. These hypothesis-generating findings support U-VATS in selected octogenarians when comprehensive geriatric assessment and structured delirium prevention guide perioperative management; validation in larger multicenter prospective studies is required. Full article

11 pages, 1213 KB

Open AccessTechnical Note

Osseous Engagement of Sacropelvic Porous Fusion–Fixation Screws

by Jason J. Haselhuhn, David W. Polly, Jr., Todd J. Pottinger, Kari Odland, Jonathan N. Sembrano, Christopher T. Martin, Kristen E. Jones and Nathan R. Hendrickson

Surg. Tech. Dev. 2026, 15(1), 11; https://doi.org/10.3390/std15010011 - 5 Mar 2026

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Abstract

(1) Background and introduction: High-demand lumbosacral fusions are often supplemented with sacral-alar-iliac (SAI) screws. The idealized SAI trajectory was estimated to traverse 35 mm of sacrum before crossing the sacroiliac (SI) joint. However, there is debate on how much osseous purchase SAI screws [...] Read more.

(1) Background and introduction: High-demand lumbosacral fusions are often supplemented with sacral-alar-iliac (SAI) screws. The idealized SAI trajectory was estimated to traverse 35 mm of sacrum before crossing the sacroiliac (SI) joint. However, there is debate on how much osseous purchase SAI screws achieve. The goal of this study was to determine the amount of osseous engagement achieved using a porous fusion–fixation screw (PFFS) when placed in a stacked SAI configuration. (2) Materials and methods: We retrospectively reviewed 40 consecutive patients who underwent sacropelvic fixation with stacked PFFS at our institution from 1 June 2022 to 30 June 2023, using intraoperative computed tomography (CT)-based computer navigation. A snapshot of each screw was taken and the length of purchase within the sacrum and ilium was measured on the axial image along the anterior and posterior aspect of each screw. Nineteen patients did not have adequate images available for review and were excluded. (3) Results: The overall mean anterior sacral engagement was 38.6 mm (±8.2 mm), which was found to be statistically significantly greater than the hypothesized threshold of 35 mm (p < 0.001), while posterior sacral engagement was 28.1 mm (±8.6 mm), which was not found to be statistically significantly greater than the hypothesized threshold of 35 mm (p = 1). The mean difference in sacral engagement between the anatomical location for the cephalad screws was 10.3 mm (p < 0.001) and 10.6 mm (p < 0.001) for the caudal screws. The total sacral surface area available for bone ingrowth for bilateral stacked PFFS was calculated to be 3338.3 mm², while the total iliac surface area available for bone ingrowth was 4364.8 mm². A mean difference in surface area availability between anatomical locations was −689.5 mm² (p < 0.001) for the sacrum and 689.5 mm² (p < 0.001) for the ilium. (4) Discussion and conclusions: The SAI trajectory screws in this cohort of patients achieved approximately 39 mm of sacrum engagement anteriorly and 28 mm posteriorly. This is consistent with prior estimates based on the idealized SAI pathway through the sacrum. PFFSs allow for simultaneous sacropelvic fixation and SI joint fusion, which may reduce the incidence of de novo SI joint pain in patients with long fusion constructs. Full article

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13 pages, 1919 KB

Open AccessArticle

Radiographic Factors Associated with Tibial Pain After Expandable Distal Femoral Endoprosthesis in Skeletally Immature Patients: A Retrospective Cohort Study

by Muhammad Khatib, Assil Mahamid, Dror Robinson, Hamza Murad, Eitan Lavon, Feras Qawasmi, Ali Yassin and Mustafa Yassin

Surg. Tech. Dev. 2026, 15(1), 10; https://doi.org/10.3390/std15010010 - 3 Mar 2026

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Abstract

Background: Limb-salvage surgery using extendable distal femoral endoprostheses has become the standard reconstruction following tumor resection in skeletally immature patients, allowing continued growth and improved function. However, mechanical complications, particularly tibial pain, remain challenging and poorly understood. This study aimed to identify radiographic [...] Read more.

Background: Limb-salvage surgery using extendable distal femoral endoprostheses has become the standard reconstruction following tumor resection in skeletally immature patients, allowing continued growth and improved function. However, mechanical complications, particularly tibial pain, remain challenging and poorly understood. This study aimed to identify radiographic predictors of tibial pain and evaluate their potential utility in early risk detection. Methods: A retrospective cohort study was conducted of 29 skeletally immature patients (mean age 10.4 years) who underwent expandable distal femoral endoprosthetic replacement between 2008 and 2018 at a tertiary orthopedic oncology center. Standardized radiographs were analyzed at 6 months and final follow-up (mean 75 months) to assess cortical thickness, stem-to-cortex distances, stem migration, stress shielding, pedestal formation, and periosteal reaction. Associations between radiographic parameters and tibial pain were assessed using multivariable logistic regression, t-tests, and chi-square analyses. Results: Seventeen patients (58.6%) developed activity-limiting tibial pain requiring analgesics, as documented during follow-up. Mean medial and lateral cortical thickness increased from 3.0 mm and 3.4 mm to 4.1 mm and 5.1 mm, respectively. The logistic regression model demonstrated strong explanatory power (Pseudo R² = 0.57, p = 0.004). Medial cortical thickness at last follow-up was the only significant independent predictor of tibial pain (p = 0.042), and was significantly associated with tibial pain. Patients with tibial pain exhibited greater medial cortical thickening (p < 0.001). Stem migration (φ = 0.421, p = 0.065), stress shielding (φ = 0.476, p = 0.044), pedestal formation (φ = 0.608, p = 0.004), and periosteal reaction (φ = 0.569, p = 0.008) were also associated with pain. Conclusions: Medial cortical hypertrophy emerged as a potential radiographic biomarker for tibial pain. after expandable distal femoral endoprosthesis in growing patients. The findings suggest that cortical remodeling, stress shielding, and pedestal formation collectively reflect stem micromotion and bone adaptation. Early radiographic surveillance of these parameters warrants further investigation in prospective studies to determine their clinical utility. Larger multicenter studies are warranted to validate these predictors and refine postoperative monitoring protocols. Full article

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15 pages, 7813 KB

Open AccessEditor’s ChoiceTechnical Note

Technical Note of the Endonasal Endoscopic Transethmoidal Transcribriform Approach (EETTA) to the Anterior Cranial Fossa: An Update of the Surgical Technique, Indications, and Limitations

by Edgar G. Ordóñez-Rubiano, Antonia Cadavid-Cobo, Alejandra Ramírez-Romero, Ana S. Rincón-Díaz, Luisa F. Figueredo, Martín Pinzón, Oscar F. Zorro, Javier G. Patiño-Gómez, Diego F. Gómez-Amarillo and Fernando Hakim

Surg. Tech. Dev. 2026, 15(1), 9; https://doi.org/10.3390/std15010009 - 24 Feb 2026

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Abstract

Background: In the last few decades, endoscopic endonasal approaches (EEA) have revolutionized surgical access to the sellar region and anterior cranial fossa (ACF). One technique, the endoscopic endonasal transethmoidal transcribriform approach (EETTA), offers distinct advantages over traditional open transcranial approaches, such as reduced [...] Read more.

Background: In the last few decades, endoscopic endonasal approaches (EEA) have revolutionized surgical access to the sellar region and anterior cranial fossa (ACF). One technique, the endoscopic endonasal transethmoidal transcribriform approach (EETTA), offers distinct advantages over traditional open transcranial approaches, such as reduced morbidity, shorter hospital stays, faster recovery, and a reduced risk of neurological deficit due to less brain tissue manipulation. Methods: We present a comprehensive step-by-step description of the EETTA surgical technique, illustrated through four representative cases of varying pathologies treated at our institution. The anatomical boundaries—including the lamina papyracea, anterior and posterior ethmoidal arteries, and frontal sinus—and the surgical corridor are detailed alongside indications, technical nuances, limitations, and operative recommendations. Results: Four cases demonstrate the versatility of EETTA across diverse pathologies: two olfactory groove meningiomas (including one WHO grade 2 and one recurrent case with invasive skull base involvement), an esthesioneuroblastoma (ENB), and a recurrent inverted papilloma requiring combined transcranial and endoscopic resection. Near-total or gross-total resection was achieved in all cases. The indications, nuances, and limitations of this approach are discussed, along with tips for successful surgery. Conclusions: The EETTA represents an important minimally invasive option for ACF tumors extending into the nasal cavity, with midline involvement limited medially by the lamina papyracea. Success requires a thorough understanding of skull base anatomy, meticulous multilayer reconstruction techniques, and appropriate patient selection, based on the tumor location and lateral extension. While cerebrospinal fluid (CSF) leak remains the primary concern, contemporary techniques have substantially reduced this complication rate. Full article

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16 pages, 1829 KB

Open AccessArticle

Snap Back Versus Traditional Aspiration in Bone Marrow Harvesting: Quality Assessment and Clinical Outcomes

by Francesco Maruccia, Leonardo Savastano, Marco Sandri, Michele Bisceglia, Franco Lucio Gorgoglione and Elisabetta Mormone

Surg. Tech. Dev. 2026, 15(1), 8; https://doi.org/10.3390/std15010008 - 14 Feb 2026

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Abstract

Background: The extent to which bone marrow aspiration technique affects the biological quality of bone marrow aspirate and its clinical relevance in knee osteoarthritis remains uncertain. This study compares the efficacy of the traditional aspiration method and the Snap Back technique at two [...] Read more.

Background: The extent to which bone marrow aspiration technique affects the biological quality of bone marrow aspirate and its clinical relevance in knee osteoarthritis remains uncertain. This study compares the efficacy of the traditional aspiration method and the Snap Back technique at two anatomical harvest sites, the posterior iliac crest and the proximal tibia. Methods: This ancillary post hoc analysis was conducted within a randomized trial comparing posterior iliac crest and proximal tibia harvest sites in 60 patients with unicompartmental knee OA. Aspiration technique (traditional vs. Snap Back) was selected intraoperatively and not randomized. BMA samples were analyzed for MSCs, mononuclear cells (MNCs), platelet concentration, and marrow purity. Clinical outcomes were assessed at baseline and six months using the Visual Analog Scale and the Western Ontario and McMaster Universities Osteoarthritis Index. Results: The posterior iliac crest yielded significantly higher MSC and MNC concentrations compared to the tibia, with superior purity and PLT counts observed using the Snap Back technique. Within each anatomical site, Snap Back aspiration provided improved cellular recovery over the traditional method. However, differences in clinical outcomes between groups were modest and did not consistently reach statistical significance. Conclusions: Both harvest site and aspiration technique were associated with substantial differences in the cellular composition of BMA. The withdrawal from posterior iliac crest combined with the Snap Back technique optimizes MSC yield and marrow purity, though clinical improvements appear independent of cellular concentration in the short term. These findings suggest that standardized aspiration protocols may be relevant for the biological efficacy of orthobiologic therapies in knee OA. Full article

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10 pages, 3780 KB

Open AccessTechnical Note

Direct Suture Repair of Deltoid Ligament Using Barbed Suture: A Cost-Effective Surgical Technique for Ligamentous Repair in Ankle Fractures

by Corinne Vennitti, Alyssa Althoff, Timothy Hoggard, Seth Yarboro and Micheal Hadeed

Surg. Tech. Dev. 2026, 15(1), 7; https://doi.org/10.3390/std15010007 - 10 Feb 2026

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Abstract

Background/Objectives: Deltoid ligament injury has been reported in up to 40% of ankle fractures, as confirmed by arthroscopy. Despite the frequency of this injury, there are multiple methods of fixation, including use of sutures, anchors and grafts, with no consensus in the field [...] Read more.

Background/Objectives: Deltoid ligament injury has been reported in up to 40% of ankle fractures, as confirmed by arthroscopy. Despite the frequency of this injury, there are multiple methods of fixation, including use of sutures, anchors and grafts, with no consensus in the field on a gold standard of operative technique for deltoid ligament injuries identified in bimalleolar equivalent ankle fractures. This manuscript aims to describe a novel surgical technique for deltoid ligament repair in the setting of bimalleolar equivalent ankle fractures. Surgical Technique: In this technique, following fixation of the fibula in bimalleolar equivalent ankle fractures, barbed polydioxanone (PDS) suture is utilized for direct repair of the deltoid ligament. This technique can be completed with the patient either prone or supine, uses standard fluoroscopy for evaluation of the competency of the deltoid ligament, and utilizes a familiar anteromedial approach to the medial malleolus. When compared to using anchors for repair of the deltoid ligament, barbed PDS suture seems to provide an equivalent and cost-effective strategy for repair. Conclusions: Repair of the deltoid ligament using suture anchors is a widely accepted method that has been demonstrated to provide successful repair. However, these anchors can be costly and rely on appropriate fixation in the bone to provide long-term fixation. This suture technique seems to offer a reliable, cost-effective technique for deltoid ligament repair. Full article

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19 pages, 4218 KB

Open AccessEditor’s ChoiceArticle

Salvage Re-Gastrectomy for Isolated Locoregional Recurrence After Curative Gastrectomy: A Propensity-Matched Comparative Analysis

by Fahim Kanani, Adi Litmanovich, Yonatan Lessing, Nir Messer, Boaz Sagie, Guy Lahat and Lior Orbach

Surg. Tech. Dev. 2026, 15(1), 6; https://doi.org/10.3390/std15010006 - 2 Feb 2026

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Abstract

Background/Objectives: Recurrence after curative gastrectomy for gastric cancer remains common, and treatment options are limited. In selected patients with isolated locoregional relapse, salvage re-gastrectomy may provide durable disease control. This study compared outcomes of salvage re-gastrectomy and chemotherapy for isolated locoregional recurrence. Methods: [...] Read more.

Background/Objectives: Recurrence after curative gastrectomy for gastric cancer remains common, and treatment options are limited. In selected patients with isolated locoregional relapse, salvage re-gastrectomy may provide durable disease control. This study compared outcomes of salvage re-gastrectomy and chemotherapy for isolated locoregional recurrence. Methods: We reviewed 500 consecutive gastrectomies performed between 2010 and 2024. In total, 66 patients (12.8%) developed isolated locoregional recurrence after previous R0 resection: 25 underwent salvage re-gastrectomy, and 41 received chemotherapy. Propensity-score matching (intended 1:2) was used to balance clinical and pathologic variables, yielding 42 patients (17 surgery, 25 chemotherapy). The primary endpoint was overall survival (OS) from recurrence diagnosis; secondary endpoints included perioperative outcomes and patterns of treatment failure. Results: There were no 30-, 60-, or 90-day deaths after salvage re-gastrectomy. Overall mortality was lower in the surgical group (41.2%) compared with chemotherapy (80.0%; p = 0.010). Salvage re-gastrectomy was independently associated with better OS (HR 0.15, 95% CI 0.02–0.87, and p = 0.035). A longer disease-free interval correlated strongly with survival (ρ = 0.80 and p < 0.001). Surgical patients experienced fewer local (0% vs. 52%) and peritoneal (0% vs. 20%) recurrences. Conclusions: For carefully selected patients with late, isolated locoregional recurrence, salvage re-gastrectomy is feasible and associated with longer survival and improved local control compared with chemotherapy alone. Larger prospective studies are warranted. Full article

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6 pages, 850 KB

Open AccessCase Report

A Novel Approach to Tracheostomal and Tracheal Stenosis: Dilatation Under Jet Ventilation with Inflated Foley Catheter—Two Cases

by Chia-Heng Chang, Sheng-Po Hao, Daniel Erick Amparado and Chung-Yu Hao

Surg. Tech. Dev. 2026, 15(1), 5; https://doi.org/10.3390/std15010005 - 27 Jan 2026

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Abstract

Tracheostomal stenosis is a troublesome and distressing complication in laryngectomy. There are numerous techniques that describe dilatation of tracheostoma which are mostly performed under general anesthesia with the intermittent apnea technique. We report an alternative dilatation method using a Foley catheter for laryngectomee [...] Read more.

Tracheostomal stenosis is a troublesome and distressing complication in laryngectomy. There are numerous techniques that describe dilatation of tracheostoma which are mostly performed under general anesthesia with the intermittent apnea technique. We report an alternative dilatation method using a Foley catheter for laryngectomee with stomal stenosis. One case was performed under high-frequency jet ventilation and the other case was carried out with a conventional anesthesia machine. The Foley catheter is used as a conduit for ventilation and the balloon on the Foley catheter was used as a dilatator. Full article

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13 pages, 1008 KB

Open AccessArticle

Radiofrequency Ablation (RFA) with Biliary Stenting in Malignant Biliary Obstruction: Case Series from a Single-Institution

by Tomasz Klimczak, Wojciech Ciesielski, Wiktoria Aptacy, Kinga Włudyka, Agata Grochowska, Adam Durczyński, Janusz Strzelczyk and Piotr Hogendorf

Surg. Tech. Dev. 2026, 15(1), 4; https://doi.org/10.3390/std15010004 - 8 Jan 2026

Cited by 1 | Viewed by 1437

Abstract

Background/Objectives: Endoscopic biliary stenting is the standard palliative intervention for malignant biliary obstruction, aimed at restoring ductal patency. Radiofrequency ablation (RFA) has been introduced as an adjunct technique to improve stent durability and patient outcomes. However, the literature remains inconclusive regarding which [...] Read more.

Background/Objectives: Endoscopic biliary stenting is the standard palliative intervention for malignant biliary obstruction, aimed at restoring ductal patency. Radiofrequency ablation (RFA) has been introduced as an adjunct technique to improve stent durability and patient outcomes. However, the literature remains inconclusive regarding which patients are most likely to benefit from the combination of RFA and stenting. Methods: We retrospectively described clinical outcomes of 24 patients undergoing endobiliary RFA combined with biliary stenting for malignant biliary obstruction. Post-procedural and 6-month outcomes were assessed using technical success and changes in serum bilirubin; procedure-related adverse events were extracted from available medical records. Results: Nineteen females and five males were included in the study. The most prevalent diagnoses were metastatic adenocarcinoma (n = 8) and cholangiocarcinoma (n = 6). 25% of patients did not complete the 6-month follow-up due to malignancy progression. 16 out of 18 maintained the patency of biliary stents. Repeat endoscopic intervention for suspected stent dysfunction was documented in one patient. When analyzed in an intention-to-treat manner (counting deaths before 6 months as failures), the corresponding 6-month patency/clinical success rate was 16/24 (66.7%). Conclusions: In this retrospective single-center experience, RFA combined with biliary stenting was feasible and was associated with maintained biliary drainage in a majority of patients who survived to the 6-month assessment. Full article

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16 pages, 4062 KB

Open AccessEditor’s ChoiceReview

Arteriovenous Malformations and Fistulas of the Inferior Mesenteric Artery: A Comprehensive Literature Review and Clinical Experience

by Federica Ruggiero, Pasqualino Sirignano, Michele Rossi, Edoardo Ronconi and Francesco Stillo

Surg. Tech. Dev. 2026, 15(1), 3; https://doi.org/10.3390/std15010003 - 7 Jan 2026

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Abstract

Background: inferior mesenteric arteriovenous malformations and fistulas (IMAVMs/IMAVFs) are rare but clinically significant vascular anomalies characterized by abnormal communications between arterial and venous systems, leading to major hemodynamic disturbances. These lesions may be silent or cause disabling and difficult-to-diagnose symptoms such as colonic [...] Read more.

Background: inferior mesenteric arteriovenous malformations and fistulas (IMAVMs/IMAVFs) are rare but clinically significant vascular anomalies characterized by abnormal communications between arterial and venous systems, leading to major hemodynamic disturbances. These lesions may be silent or cause disabling and difficult-to-diagnose symptoms such as colonic ischemia, portal hypertension, or even high-output cardiomyopathy. Methods: this narrative review aims to summarize current evidence on the pathophysiology, clinical features, diagnostic methods, and therapeutic management of these rare pathologies, supported by two our clinical cases. Conclusions: due to their rarity, multidisciplinary management and anatomical guided therapy are required for safe and lasting outcomes in patients with IMAVMs and IMAVFs. Full article

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9 pages, 610 KB

Open AccessArticle

Monitoring Vital Parameters Enhanced by Wireless Devices Related to Bariatric Surgery (MOVIES-Trial)

by Jai Scheerhoorn, Max Herman Funnekotter, Friso Schonck, R. Arthur Bouwman and Simon W. Nienhuijs

Surg. Tech. Dev. 2026, 15(1), 2; https://doi.org/10.3390/std15010002 - 3 Jan 2026

Viewed by 1124

Abstract

Background: Obesity and its accompanying complications have an influence on diurnal rhythm, potentially causing cardiometabolic disease. This study explores how weight loss due to bariatric surgery affects circadian rhythm disruptions measurable through wearable heart rate monitors. Methods: A single-center observational study was performed, [...] Read more.

Background: Obesity and its accompanying complications have an influence on diurnal rhythm, potentially causing cardiometabolic disease. This study explores how weight loss due to bariatric surgery affects circadian rhythm disruptions measurable through wearable heart rate monitors. Methods: A single-center observational study was performed, in which patients who had undergone primary bariatric surgery 3 years ago with telemonitoring of vital parameters using a wireless accelerometer were eligible to participate. A Wilcoxon signed-rank test was conducted to evaluate the delta of, or amount of change in, circadian patterns between the baseline (before) and post-weight-loss peak, nadir, and peak–nadir heart rates. Results: In this cohort of 69 patients, 70% were female, with a median total weight loss of 31.4% towards a median BMI of 28.4 kg/m². Analysis revealed significant changes in peak–nadir excursions post-weight loss. Peak, nadir, and peak–nadir differences showed a significant reduction in values in the post-weight-loss group. No significant correlations between other clinical endpoints and change in peak–nadir excursion were found in the multivariable regression models. Conclusions: In conclusion, this study reveals significant changes in circadian heart rate patterns before and after weight loss due to metabolic surgery. The results could add to the health benefits of bariatric surgery, as it could lower the incidence of diseases associated with changes in diurnal rhythm due to obesity. However, a clear clinical explanation is lacking, as no correlation with total weight loss nor other variables was substantiated. Full article

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16 pages, 11571 KB

Open AccessCase Report

Role of Patient-Specific 3D-Printed Models for Complex Pediatric Craniocervical Junction Surgery: Case Description and Systematic Literature Review

by David S. K. Mak, Yu Tung Lo, Mark B. W. Tan, Dinesh S. Kumar and Sharon Y. Y. Low

Surg. Tech. Dev. 2026, 15(1), 1; https://doi.org/10.3390/std15010001 - 30 Dec 2025

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Abstract

Background: Pediatric craniocervical junction (CCJ) anomalies consist of a unique subset of anatomically complex spine conditions. The aims of intervention are to achieve long-term stability, correct existing deformity, and prevent neurological compromise. However, surgery is challenging due to critical neurovascular and musculoskeletal structures [...] Read more.

Background: Pediatric craniocervical junction (CCJ) anomalies consist of a unique subset of anatomically complex spine conditions. The aims of intervention are to achieve long-term stability, correct existing deformity, and prevent neurological compromise. However, surgery is challenging due to critical neurovascular and musculoskeletal structures in the limited operative space of a young child. Recently, the use of three-dimensional (3D) printed models has been demonstrated to be valuable neurosurgical adjuncts. We therein report the application of a 3D-printed model for a pediatric case with a complex CCJ condition. A systematic review of the related literature is concurrently performed. Case description: A 10-year-old male presented with torticollis associated with neck pain and progressive thoracic kyphosis. Neuroimaging reported an unfused os odontoideum inferior to the basion and anterior half of the C2 vertebral body and anteriorly angulated with the C1 anterior arch. Of note, there was a large vertebral vein coursing over the left C2 lamina that was predominantly draining into the CCJ venous plexus. A radiologically derived 3D model of the patient’s CCJ was printed and used for pre-operative planning, multi-disciplinary team discussion, and detailed counseling with the patient and caregivers. The patient underwent an uneventful C1–C2 posterior screw fixation and has recovered well since. Separately, we observed there is a paucity of publications specific to this topic. Conclusions: As demonstrated, a custom-made 3D model was useful for clinicians work through technical difficulties and improve the perioperative discussion process in an otherwise difficult case. Full article

(This article belongs to the Special Issue Contemporary Surgical Strategies, Advanced Imaging, and Intelligent Technologies in Head and Neck Surgery)

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Surg. Tech. Dev., Volume 15, Issue 1 (March 2026) – 13 articles

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