scholarly journals Magnetic resonance imaging to estimate tissue deformations during penile clamp application: A case series

2020 ◽  
Vol 13 (6) ◽  
pp. 402-406
Author(s):  
Joe Lemmens ◽  
Lea Peko Cohen ◽  
Peter R Worsley ◽  
Chris Everitt ◽  
Jackie Broadbridge ◽  
...  
Keyword(s):  
Urinary Incontinence ◽  
Magnetic Resonance ◽  
Radical Prostatectomy ◽  
Soft Tissues ◽  
Case Series ◽  
Local Stress ◽  
Magnetic Resonance Images ◽  
Stress Concentrations ◽  
Level Of Evidence ◽  
Tissue Deformations

Background: Penile clamps provide a means of preventing urinary incontinence in males following radical prostatectomy. In order for the devices to function, significant mechanical loads need to be applied to the penile tissues to close the urethra. However, such loads have the potential to cause damage to the vulnerable skin and underlying soft tissues. Accordingly, the study aimed to estimate the magnitudes of tissue deformations resulting from penile clamp application in three individual cases. Methods: Three individuals were recruited who currently use penile clamps to manage urinary incontinence following radical prostatectomy. Magnetic resonance images (MRI) of the penis were taken to produce a series of high contrast coronal and sagittal images both before and during the application of two commercially available clamps, modified for MRI compatibility. Tissue thickness measurements were estimated with the clamps in-situ and normalised to the unloaded baseline state. Results: The estimated magnitude of tissue deformations resulting from clamp application ranged between 68% and 84%. There were minimal differences in these deformations between the clamp designs, both of which appeared effective in closing the urethra. Local stress concentrations were observed in the tissues, which were deformed around the shape of the clamp. Conclusions: MRI enabled quantification of local tissue deformation during penile clamp application. The results revealed that clamps created large tissue deformations in all three cases, regardless of design. This information could inform the development of new clamp designs and materials to minimise the potential for tissue damage. Level of evidence: 4

Comparing Tendinous and Ligamentous Ankle Pathology in Atraumatic Overweight and Nonoverweight Patients

2014 ◽  
Vol 7 (6) ◽  
pp. 449-456 ◽  
Author(s):  
Melissa M. Galli ◽  
Nicole M. Protzman ◽  
Eiran M. Mandelker ◽  
Amit Malhotra ◽  
Edward Schwartz ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Magnetic Resonance ◽  
Present Report ◽  
Case Series ◽  
Magnetic Resonance Images ◽  
Exclusion Criteria ◽  
Level Of Evidence ◽  
Prevalence Of Obesity ◽  
Prospective Longitudinal ◽  
Prospective Longitudinal Cohort

With the increased prevalence of obesity, there has been a parallel rise in musculoskeletal disorders. However, the effect of body mass index (BMI) on pathology of the hindfoot and ankle is scarcely understood. The purpose of the present report was to compare the number of tendinous and ligamentous pathologies within the hindfoot and ankle between overweight (BMI ≥ 25.00 kg/m2) and nonoverweight (BMI < 25.00 kg/m2) atraumatic patients. We hypothesized that overweight patients would demonstrate more tendinous and ligamentous pathologies compared with their nonoverweight counterparts. Five hundred consecutive magnetic resonance images were reviewed. One hundred eight patients met the inclusion and exclusion criteria. Sixty-six patients were overweight and 42 patients were nonoverweight. Ninety-eight percent of overweight patients demonstrated pathology of a tendinous or ligamentous nature, whereas 62% of nonoverweight patients demonstrated pathology of a tendinous or ligamentous nature. Thus, the prevalence of pathology was 1.59 times higher among overweight patients compared with nonoverweight patients. Moreover, controlling for age, overweight patients demonstrated approximately twice as many tendinous and ligamentous pathologies compared with nonoverweight patients (adjusted mean ± SD = 4.44 ± 2.14 vs 1.98 ± 2.07, respectively), which was statistically significantly different ( P < .001). To definitively assess causation and the clinical evolution of hindfoot and ankle pathology, prospective, longitudinal cohort studies are warranted. Level of Evidence: Diagnostic, Level III: Case series

Osteochondral Transplantation in the Elbow Leads to Good Clinical and Radiologic Long-term Results

2011 ◽  
Vol 39 (12) ◽  
pp. 2619-2625 ◽  
Author(s):  
Stephan Vogt ◽  
Sebastian Siebenlist ◽  
Daniel Hensler ◽  
Lizzy Weigelt ◽  
Patrick Ansah ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Case Series ◽  
Magnetic Resonance Images ◽  
Weight Lifting ◽  
Long Term Results ◽  
Osteochondral Lesions ◽  
Osteochondral Transplantation ◽  
Level Of Evidence

Background: In the long-term follow-up after debridement, microfracture, or drilling of osteochondral lesions in the elbow, subsequent osteoarthritis is a problem. Osteochondral transplantation for these defects has become a more common procedure. However, long-term results are unknown. Purpose: This study was undertaken to evaluate long-term clinical and radiologic outcomes of advanced osteochondral lesions in the elbow treated with osteochondral transplantation. Study Design: Case series; Level of evidence, 4. Methods: The study included 8 patients with osteochondral lesions in the elbow who were treated by autologous osteochondral transplantation between 1996 and 2002. Patients (average age, 17 years) were evaluated pre- and postoperatively by Broberg-Morrey score to assess elbow function and by American Shoulder and Elbow Surgeons (ASES) score for pain analysis. In addition, radiographs (at the first postoperative day, and at 5-year and 10-year follow-up) and magnetic resonance images (8 to 12 weeks postoperatively, and at 5-year and 10-year follow-up) were made to evaluate the joint status. At last follow-up (range, 8-14 years postoperatively), 7 of 8 patients were seen for clinical examination and radiologic analysis. Results: The Broberg-Morrey score increased from an average of 75.9 ± 13.1 to 96.4 ± 2.4 and ASES score significantly improved as follows: worst pain, 7.9 ± 1.1 to 1.6 ± 1.9; rest pain, 3.14 ± 2.7 to 0.6 ± 1.5; weight-lifting pain, 7.6 ± 0.8 to 3.1 ± 1.6; and repetitive movement pain, 5.3 ± 2.4 to 1.6 ± 1.5. Compared with the contralateral side, there was a mean preoperative flexion lag of 12.5° ± 11.6°. At the final follow-up, flexion was free. The mean extension lag was reduced from average 5.4° ± 5.7° to 0°. Radiographs of 2 patients made at final follow-up showed mild signs of osteoarthritis (Kellgren and Lawrence grade I). Postoperative magnetic resonance images showed graft viability in all and a congruent chondral surface in 6 of 7 patients. Conclusion: Clinical long-term results after osteochondral transplantation in the elbow are good to excellent and comparable with midterm results in the literature. Therefore, this technique is a reliable option for satisfactory long-term results regarding treatment of advanced osteochondral lesions in the elbow.

scholarly journals SYMPTOMATIC INTRADISCAL VACUUM PHENOMENON

2019 ◽  
Vol 18 (4) ◽  
pp. 280-282
Author(s):  
Pedro Luis Bazán ◽  
Richard Alejandro Avero González ◽  
Nicolás Maximiliano Ciccioli ◽  
Álvaro Enrique Borri ◽  
Martín Medina
Keyword(s):  
Magnetic Resonance ◽  
Smoking Status ◽  
Case Series ◽  
Magnetic Resonance Images ◽  
Lower Limbs ◽  
Common Finding ◽  
Level Of Evidence ◽  
Plain Radiographs ◽  
Vacuum Phenomenon ◽  
Discogenic Low Back Pain

ABSTRACT Objective: Intradiscal vacuum phenomenon (IVP) is a common finding in the study of degenerative disc disease. Discogenic low back pain can be manifested in different ways, including irradiation to the lower limbs. This study aims to acknowledge the complementary studies used to diagnose IVP, determine their sensitivity, and assess the correlation between clinical and imaging findings. Methods: This is a descriptive, observational and prospective study involving clinical and imaging evaluation of 100 patients with IVP, using dynamic and plain radiographs, computed tomography and magnetic resonance imaging. The factors of analysis include sex, age, reason for consultation, visual analogue scale, irradiation and topography of the pain, the existence of sciatica and claudication, smoking status, and body mass index. Results: The overall average age of the patients was 64.6 years, who particularly evidence degenerative pathology. IVP was observed in 99 CT, 85 dynamic radiographs, 80 plain radiographs and 65 nuclear magnetic resonance images (MRI). Conclusion: The most useful studies for diagnosing the vacuum disc phenomenon are plain and dynamic radiographs, tomography, and magnetic resonance. The CT is the most sensitive imaging study for IVP detection, followed by dynamic radiographs obtained during extension. A correlation was observed between older age, overweight, and IVP. Level of evidence IV; Case-series.

All-Arthroscopic Autologous Matrix-Induced Chondrogenesis-Aided Repair of a Patellar Cartilage Defect Using Dry Arthroscopy and a Retraction System

2017 ◽  
Vol 30 (09) ◽  
pp. 925-929 ◽  
Author(s):  
Mariusz Puszkarz ◽  
Lidia Kosmalska ◽  
Martin Wiewiorski ◽  
Boguslaw Sadlik
Keyword(s):  
Magnetic Resonance ◽  
Cartilage Repair ◽  
Case Series ◽  
Collagen Matrix ◽  
International Knee Documentation Committee ◽  
Level Of Evidence ◽  
Patellar Cartilage ◽  
Radiological Data ◽  
Implantation Techniques

AbstractThe technique of all-arthroscopic autologous matrix-induced chondrogenesis (AMIC)-aided repair of patellar cartilage lesions using a retraction system and dry arthroscopy has been recently described. We report the first clinical and radiological data at a short-term follow-up. Twelve patients underwent AMIC-aided cartilage repair for a patellar lesion. All steps of the procedure were performed arthroscopically, which include the use of an intra-articularly placed retraction plate for distraction of the patellofemoral joint and evacuation of saline solution for collagen matrix insertion and fixation. Clinical assessment performed before surgery and at a mean follow-up time of 38 months (range: 24–70) included the following scores: Knee Injury and Osteoarthritis Outcome Score (KOOS), International Knee Documentation Committee (IKDC), and visual analog scale (VAS). Magnetic resonance imaging was performed at the follow-up examination, including the magnetic resonance observation of cartilage repair tissue (MOCART) score. The mean KOOS and IKDC scores increased significantly (p < 0.01) from 50.3 and 37.4 points preoperatively to 90.1 and 79.4 postoperatively. The VAS score decreased from 7.8 to 2.3 points. Mean MOCART score at follow-up was 58.3 points. Cartilage repair of patellar lesions aided by a retraction system in a dry arthroscopy setup is a promising approach. Further studies are needed to evaluate this procedure and compare it to existing matrix implantation techniques. The level of evidence for the study is 4 (case series).

Autologous Osteochondral Mosaicplasty for Centrally and Laterally Located, Advanced Capitellar Osteochondritis Dissecans in Teenage Athletes: Clinical Outcomes, Radiography, and Magnetic Resonance Imaging Findings

2018 ◽  
Vol 46 (8) ◽  
pp. 1943-1951 ◽  
Author(s):  
Tadanao Funakoshi ◽  
Daisuke Momma ◽  
Yuki Matsui ◽  
Tamotsu Kamishima ◽  
Yuichiro Matsui ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Clinical Outcomes ◽  
Osteochondritis Dissecans ◽  
Case Series ◽  
Return To Play ◽  
Joint Surface ◽  
Resonance Imaging ◽  
Level Of Evidence

Background: Autologous osteochondral mosaicplasty (ie, mosaicplasty) results in satisfactory clinical outcomes and reliable return to play for patients with large or unstable lesions due to osteochondritis dissecans (OCD) of the humeral capitellum. However, the association between the healing of the reconstructed cartilage and clinical outcomes remains unclear. Purpose: To evaluate the efficacy of mosaicplasty in teenage athletes through use of clinical scores and imaging. The secondary purpose was to compare the clinical outcomes with images of centrally and laterally located lesions. Study Design: Case series; Level of evidence, 4. Methods: This study analyzed 22 elbows (all male patients; mean age, 13.5 ± 1.2 years) with capitellar OCD managed with mosaicplasty. Patients were divided into 2 groups according to the location of the lesions: central (10 patients) and lateral (12 patients). Evaluation was performed through use of the clinical rating system of Timmerman and Andrews, plain radiographs, and magnetic resonance imaging (MRI; the cartilage repair monitoring system of Roberts). The mean follow-up period was 27.5 months (range, 24-48 months). Results: Lateral lesions were significantly larger than central lesions (147.1 ± 51.9 mm2 vs 95.5 ± 27.4 mm2, P = .01). No other significant differences were found between central and lateral lesions. Timmerman and Andrews scores for both central and lateral lesions improved significantly from 125.0 ± 30.1 points and 138.3 ± 34.5 points preoperatively to 193.5 ± 11.3 points and 186.7 ± 18.1 points, respectively, at final follow-up ( P < .0001, P < .0001). Radiography identified complete graft incorporation in all cases and the absence of severe osteoarthritic changes or displaced osteochondral fragments. In the lateral group, the radial head ratio at final follow-up (1.83 ± 0.23) was significantly larger than the preoperative findings (1.75 ± 0.14, P = .049). The quality of joint surface reconstruction was found to be acceptable for central and lateral lesions on MRI evaluation. Conclusion: Mosaicplasty resulted in satisfactory clinical outcomes and smooth cartilage surface integrity in teenage athletes with OCD on their return to competition-level sports activities irrespective of lesion location.

scholarly journals Sub-SMAS Transposition of the Buccal Fat Pad

2019 ◽  
Author(s):  
Ozan Bitik
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Images ◽  
Surface Measurement ◽  
Fat Pad ◽  
Buccal Fat Pad ◽  
Level Of Evidence ◽  
Curvilinear Surface ◽  
3 Dimensional ◽  
Volume Deficit ◽  
Dimensional Models

AbstractBackgroundRegardless of the technique chosen to treat the aging midface, the isolated lateral approach facelift has a limited impact on the midface volume deficit. In an effort to overcome this limitation, modern facial rejuvenation procedures incorporate an additional modality for replenishing the midface volume. Some of the author’s facelift patients present with bulging buccal fat pads despite volume deficiency in the inframalar region. The author’s technique is designed to utilize the buccal fat pad to replenish the inframalar volume deficit.ObjectivesThe author sought to present the fat pad transposition surgical technique along with objective outcome data.MethodsThis study was a retrospective review of nonconsecutive cases where the sub-superficial-musculo-aponeurotic-system transposition of the buccal fat pad was performed. A total of 22 patients underwent the fat pad transposition technique by the author (O.B.) between July 2013 and December 2017. Patient data were obtained from patient records, 3-dimensional models, magnetic resonance images, and standardized photography. Preoperative differences in midface volume were assessed utilizing curvilinear surface measurements on 3-dimensional models and the Allergan midface volume deficit scale on standardized photography.ResultsThe average midface volume deficit score significantly improved, and the average midfacial curvilinear surface measurement significantly increased after surgery. Magnetic resonance imaging confirmed a stable position of the buccal fat pad after surgery.ConclusionsThe sub-superficial-musculo-aponeurotic-system transposition of the buccal fat pad is an effective technique that can be safely employed for autologous inframalar augmentation in patients with a favorable facial morphology.Level of Evidence: 4

Partial capitate shortening for Kienböck’s disease

2014 ◽  
Vol 40 (9) ◽  
pp. 957-960 ◽  
Author(s):  
A. Citlak ◽  
U. Akgun ◽  
T. Bulut ◽  
M. Tahta ◽  
B. Dirim Mete ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Case Series ◽  
Magnetic Resonance Images ◽  
Stage Ii ◽  
Pinch Strength ◽  
Case Series Study ◽  
The Mean ◽  
Series Study ◽  
Carpal Height

The purpose of this study was to report our experience of partial capitate shortening in seven patients with a median 38 months follow-up. Staging was made by the Lichtman classification system and stage II and III-A patients were included in the study. The mean age was 34 years (range 22–52). Patients were assessed for pain, range of motion, grip and pinch strength, and satisfaction was recorded using a scale between 0 and 4. All these parameters showed improvement after surgery. The Lichtman stage, lunate height index and carpal height index were determined radiographically. Magnetic resonance images of the wrist were studied for lunate revascularization at the final follow-up and occurred in all patients. According to our study, partial capitate shortening seems an effective treatment for Lichtman stage II and III-A patients. Level IV case series study.

scholarly journals Retrospective Analysis of the Accuracy of Ultrasound-Guided Magnetic Resonance Arthrogram Injections of the Hip in the Office Setting

2017 ◽  
Vol 5 (12) ◽  
pp. 232596711774391 ◽  
Author(s):  
Michael Jernick ◽  
Edward Walker Gallego ◽  
Michael Nuzzo
Keyword(s):  
Body Mass Index ◽  
Magnetic Resonance ◽  
Case Series ◽  
Ultrasound Guided ◽  
Level Of Evidence ◽  
Office Setting ◽  
Radiology Reports ◽  
Magnetic Resonance Arthrogram ◽  
Patient Variables ◽  
Age And Sex

Background: Ultrasound (US)–guided intra-articular hip injections have been proposed in the literature to be accurate, reliable, and safe alternatives to fluoroscopy-guided injections. Purpose: To evaluate the accuracy of US-guided magnetic resonance (MR) arthrogram injections of the hip performed in the office setting by a single orthopaedic surgeon and elucidate the potential effects that patient age, sex, and body mass index (BMI) have on contrast placement. Study Design: Case series; Level of evidence, 4. Methods: From a review of the senior author’s office database, 89 patients (101 hips) who had US-guided MR arthrogram injections performed between December 2014 and June 2016 were identified. Official radiology reports were evaluated to determine whether extra-articular contrast was noted. Patient variables, including BMI, age, and sex, were evaluated between patients who had inappropriately placed contrast and those who did not. Results: Of the 101 hip injections, there were 6 cases that demonstrated inadequate contrast placement within the joint, likely secondary to extravasation or incorrect placement; however, an MR arthrogram was adequately interpreted in all cases. There were no significant differences noted between those with appropriate versus inappropriate contrast placement when evaluating BMI ( P = .57), age ( P = .33), or sex ( P = .67), and neither group had an adverse event. Conclusion: US-guided injections are safe and accurate alternatives to fluoroscopy-guided injections in the office setting, with 94% accuracy. Furthermore, BMI, age, and sex did not play a statistically significant role among patients with inappropriately placed contrast.

scholarly journals Comparative Study of Encoder–Decoder-Based Convolutional Neural Networks in Cartilage Delineation from Knee Magnetic Resonance Images

2020 ◽  
Vol 16 ◽  
Author(s):  
Ching Wai Yong ◽  
Khin Wee Lai ◽  
Belinda Pingguan Murphy ◽  
Yan Chai Hum
Keyword(s):  
Neural Networks ◽  
Magnetic Resonance ◽  
Convolutional Neural Networks ◽  
Soft Tissues ◽  
Early Stage ◽  
Joint Inflammation ◽  
Magnetic Resonance Images ◽  
Mr Images ◽  
Daily Lives ◽  
Osteoarthritis Initiative

Background: Osteoarthritis (OA) is a common degenerative joint inflammation which may lead to disability. Although OA is not lethal, this disease will remarkably affect patient’s mobility and their daily lives. Detecting OA at an early stage allows for early intervention and may slow down disease progression. Introduction: Magnetic resonance imaging is a useful technique to visualize soft tissues within the knee joint. Cartilage delineation in magnetic resonance (MR) images helps in understanding the disease progressions. Convolutional neural networks (CNNs) have shown promising results in computer vision tasks, and various encoder–decoder-based segmentation neural networks are introduced in the last few years. However, the performances of such networks are unknown in the context of cartilage delineation. Methods: This study trained and compared 10 encoder–decoder-based CNNs in performing cartilage delineation from knee MR images. The knee MR images are obtained from Osteoarthritis Initiative (OAI). The benchmarking process is to compare various CNNs based on the physical specifications and segmentation performances. Results: LadderNet has the least trainable parameters with model size of 5 MB. UNetVanilla crowned the best performances by having 0.8369, 0.9108, and 0.9097 on JSC, DSC, and MCC. Conclusion: UNetVanilla can be served as a benchmark for cartilage delineation in knee MR images while LadderNet served as alternative if there are hardware limitations during production.

Outcomes of Posterior Arthroscopic Reduction and Internal Fixation (PARIF) for the Posterior Malleolar Fragment in Trimalleolar Ankle Fractures

2020 ◽  
pp. 107110072095514
Author(s):  
Kevin D. Martin ◽  
Courtney T. Tripp ◽  
Jeannie Huh
Keyword(s):  
Internal Fixation ◽  
Soft Tissues ◽  
Case Series ◽  
Ankle Fractures ◽  
Ct Scans ◽  
Loose Bodies ◽  
Level Of Evidence ◽  
Arthroscopic Reduction ◽  
Malleolar Fractures ◽  
Patient Reported

Background: Posterior malleolar fractures within a trimalleolar ankle fracture pattern are challenging to manage. Posterior ankle arthroscopy provides a means to assess the intra-articular and syndesmotic reductions, while removing loose bodies. The purpose of this study was to determine the radiographic and patient reported outcomes of posterior arthroscopic reduction and internal fixation (PARIF) in trimalleolar ankle fractures. Methods: From November 2015 to March 2019, we prospectively enrolled consecutive trimalleolar ankle fractures that underwent PARIF by a single surgeon. Preoperative and postoperative computed tomography (CT) scans were interpreted by 2 blinded musculoskeletal radiologists for articular reduction, syndesmosis congruity, and presence of ossific loose bodies. Patient outcomes were assessed using the Foot and Ankle Disability Index (FADI), American Orthopaedic Foot & Ankle Society (AOFAS) ankle score, Olerud-Molander Ankle Score (OMAS), and visual analog scale (VAS). A total of 28 trimalleolar ankle fractures were treated with PARIF. Mean patient age was 36 years (range, 19-69). Results: Preoperative CT identified 18 intra-articular loose bodies (range, 0-4) in 36% of ankles and 75% (n = 21) syndesmosis incongruity. Postoperative CT scans demonstrated anatomic intra-articular reduction in all fractures, 41.7% (5/12) syndesmosis incongruity without fixation, and 0% (0/9) with suture-button fixation. At mean 2-year follow-up, the results were good to excellent with mean VAS score 1 (range, 0-4), AOFAS score 84 (range, 63-100), FADI 85 (range, 59-100), and OMAS 76 (range, 40-100). Conclusion: The PARIF technique for displaced posterior malleolar fractures was effective in achieving anatomic intra-articular reduction, syndesmosis congruity, and intra-articular loose body removal, while safely preserving the soft tissues. Level of Evidence: Level IV, prospective case series.

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