scholarly journals Noniatrogenic Medial Patellar Dislocations: Case Series and International Patellofemoral Study Group Experience

2021 ◽  
Vol 9 (2) ◽  
pp. 232596712098553
Author(s):  
Alexander E. Loeb ◽  
Jack Farr ◽  
Shital N. Parikh ◽  
Andrew J. Cosgarea
Keyword(s):  
Risk Factors ◽  
Patellar Dislocation ◽  
Patellar Instability ◽  
Case Series ◽  
Collegiate Athletes ◽  
Study Group ◽  
Case Review ◽  
Level Of Evidence ◽  
Lateral Direction ◽  
Ehlers Danlos Syndrome

Background:Most patellar dislocations occur in a lateral direction because of a summed lateral force vector and predisposing anatomic risk factors. Medial patellar instability is rare and is a well-recognized iatrogenic complication of an overly aggressive lateral retinacular release. Noniatrogenic medial patellar dislocations are rare. The management of these injuries is not well described.Purpose:To describe the experience of the International Patellofemoral Study Group with patients with noniatrogenic medial patellar dislocation.Study Design:Case series; Level of evidence, 4.Methods:Members of the International Patellofemoral Study Group (N = 64) were surveyed between October 2018 and April 2019. This group was chosen because of its wide referral base and interest in patellar instability. Specialists who had encountered a patient with medial patellar instability were sent a questionnaire inquiring about details of the case, including patient demographics, medical history, level of athletic competition, injury characteristics, and treatment. Cases were confirmed by physical examination records and, in some cases, with findings on advanced radiographic imaging.Results:The survey response rate was 73% (47/64). Three of the 47 specialists (6.4%) reported they had seen a case of noniatrogenic medial patellar dislocation, for a total of 6 cases. Four cases were described as recurrent medial dislocations in the setting of hypermobile Ehlers-Danlos syndrome; 2 were treated nonoperatively, 1 underwent lateral patellofemoral ligament reconstruction, and 1 underwent derotational osteotomies. Two medial-sided patellar dislocations in collegiate athletes were sports-related injuries that required surgical debridement but no ligamentous reconstruction. None of the patients had persistent or recurrent instability at the time of their most recent follow-up.Conclusion:Noniatrogenic medial patellar dislocations are extremely rare. This case review suggests that the treatment of first-time medial patellar instability in patients without known risk factors should follow the same principles as the treatment of lateral instability with no known risk factors, which is nonoperative management. For patients with documented risk factors and recurrence, surgery to address the risk factors may be appropriate.

Posterior Shoulder Instability: Surgical Outcomes and Risk of Failure in Adolescence

2020 ◽  
Vol 48 (5) ◽  
pp. 1200-1206
Author(s):  
Alicia M. Asturias ◽  
Tracey P. Bastrom ◽  
Andrew T. Pennock ◽  
Eric W. Edmonds
Keyword(s):  
Risk Factors ◽  
Shoulder Instability ◽  
Case Series ◽  
Short Version ◽  
Posterior Shoulder Instability ◽  
Level Of Evidence ◽  
Ehlers Danlos Syndrome ◽  
Posterior Shoulder ◽  
Younger Age

Background: Arthroscopic capsulolabral reconstruction has proven to be effective in treating posterior shoulder instability. Few studies have examined the risk factors that may contribute to poor outcomes in the adolescent population. Purpose: To identify risk factors for surgical failure by comparing anatomic and subjective variations in children who underwent surgical intervention for posterior shoulder instability. Study Design: Case series; Level of evidence, 4. Methods: All patients undergoing arthroscopic shoulder surgery at one institution between 2011 and 2018 were reviewed. Patients >18 years old at presentation and those with Ehlers-Danlos syndrome were excluded. Posterior instability was defined as unidirectional subluxation on posterior drawer testing while under anesthesia. Two-year minimum follow-up was required, but those whose treatment failed earlier were included for calculation purposes. Demographics and intraoperative findings were recorded, as were Single Assessment Numeric Evaluation (SANE) scoring, Pediatric and Adolescent Shoulder Survey (PASS), and the short version of the Disabilities of the Arm, Shoulder and Hand (QuickDASH) results. Major complication was defined as revision arthroscopy or redislocation, and minor complications included self-reporting a poor outcome score (eg, SANE score <65). Results: A total of 48 children (23 girls and 25 boys) met criteria, with a mean age of 16.5 years (range, 12.4-17.9 years) and a mean follow-up of 3.75 years. Fifteen (31.3%) patients had a complication by our criteria, including 12.5% with surgical failures; regarding major complications, boys were treated successfully 96% of the time and girls 78% of the time ( P = .049). Of the anatomic and subjective variables tested, only younger age ( P≤ .001) and presentation type ( P < .05) were correlated with complications. SANE scores differed significantly ( P < .002) by presentation type, with mean scores of 52 (trauma), 94 (recurrent instability), and 81 (pain). QuickDASH scores demonstrated patients with a history of trauma (mean, 37), instability (mean, 9), and pain (mean, 11). Conclusion: Adolescents treated surgically for posterior shoulder instability are at risk of treatment failure (when including outcome scores), and it appears that patients of female sex, younger age, and traumatic presentation are at the highest risk to require revision surgery or experience continued limitations secondary to their shoulder.

scholarly journals Clinical results in reconstruction of medial patellofemoral ligament

2017 ◽  
Vol 5 (1_suppl) ◽  
pp. 2325967117S0001
Author(s):  
Nicolas Alejandro Irigoitia ◽  
Agustín Felipe Catan ◽  
Damián Arroquy ◽  
Jorge Guiñazu ◽  
Tomas Vilaseca ◽  
...  
Keyword(s):  
Patellar Dislocation ◽  
Patellar Instability ◽  
Medial Patellofemoral Ligament ◽  
Case Series ◽  
Clinical Results ◽  
Tibial Tuberosity ◽  
Surgical Time ◽  
Level Of Evidence ◽  
Tibial Tuberosity Transfer ◽  
Suitable Treatment

Background: The reconstruction of the medial patellofemoral ligament (MPFL) is the most suitable treatment for the patellar instability at the present in patients with two or more episodes of dislocation or only one with condral lesion. This is because it is the principal medial stabilizer of the patella. This process could be supplemented with an osseous correction as tibial tuberosity transference. Objectives: assess the clinical results of the reconstruction of the MPLF in patients with patellar instability. Study Design: Case series, level of evidence IV. Methods: We enroll all patients with this procedure between form April 2011 to February 2015, the sample has 27 reconstruction in 25 patients, who has two or more episodes of patellar dislocation. The graft used was gracilis tendon, set with suture anchor, and tibial tuberosity transfer in 9 patients who need an osseous procedure. Results: The average Kujala score was 90,1 points ( 64-100). Was necessary tibial tuberosity transference in one third of se sample. And in those patients there no difference compared with the isolated reconstruction.There was no episode of patellar dislocation or a second surgical time in the sample. Conclusion: The reconstruction of MPLF show excellent clinical outcomes in a short and medium terms , with 0% of dislocation and no second surgical time, in this kind of patients.

First-Ray Radiographic Changes After Flexible Adult Acquired Flatfoot Deformity Correction

2021 ◽  
pp. 107110072110345
Author(s):  
Chien-Shun Wang ◽  
Yun-Hsuan Tzeng ◽  
Tzu-Cheng Yang ◽  
Chun-Cheng Lin ◽  
Ming-Chau Chang ◽  
...  
Keyword(s):  
Risk Factors ◽  
Hallux Valgus ◽  
Reconstructive Surgery ◽  
Case Series ◽  
Deformity Correction ◽  
Level Of Evidence ◽  
Factors Affecting ◽  
Radiographic Parameters ◽  
Case Series Study ◽  
Adult Acquired Flatfoot Deformity

Background: Adult acquired flatfoot deformity (AAFD) and hallux valgus (HV) are common foot and ankle deformities. Few studies have reported the changes in radiographic parameters of HV after reconstructive surgery for AAFD. This study aimed to evaluate the changes in radiographic parameters of HV and analyze the risk factors for increased HV after correction of AAFD. Methods: Adult patients with flexible AAFD who underwent similar bony procedures including medializing calcaneal osteotomy and Cotton osteotomy were included. Radiographic parameters were measured on weightbearing radiographs preoperatively, postoperatively, and at the final follow-up. Patients were divided into hallux valgus angle (HVA) increased and HVA nonincreased groups; logistic regression analysis was performed to identify risk factors affecting increased HV. Results: Forty-six feet of 43 patients were included. After AAFD reconstructive surgery, the tibial sesamoid position improved by 1 grade, but the HVA increased 4 degrees in average. Further, 21 of 46 feet (46%) showed an HVA increase ≥5 degrees immediately after AAFD correction surgery. Preoperative talonavicular coverage angle <21.6 degrees was a risk factor associated with HV increase immediately after the surgery. Conclusion: In this case series, using plain radiographs to measure standard parameters of foot alignment, we found the association between AAFD correction and HV deformity measures somewhat paradoxical. Correction of overpronation of the hindfoot and midfoot appears to improve the first metatarsal rotational deformity but may also increase HVA. A lower preoperative talonavicular coverage angle was associated with an increase of the HVA after surgery. Level of Evidence: Level IV, case series study.

scholarly journals Incidence and Risk Factors of Symptomatic Venous Thromboembolism Following Foot and Ankle Surgery

2018 ◽  
Vol 40 (1) ◽  
pp. 98-104 ◽  
Author(s):  
Johanna Marie Richey ◽  
Miranda Lucia Ritterman Weintraub ◽  
John M. Schuberth
Keyword(s):  
Risk Factors ◽  
Hormone Replacement ◽  
Case Series ◽  
Foot And Ankle ◽  
Retrospective Case ◽  
Level Of Evidence ◽  
Ankle Surgery ◽  
History Of ◽  
Low Incidence ◽  
Predictive Risk

Background: The incidence rate of venous thrombotic events (VTEs) following foot and ankle surgery is low. Currently, there is no consensus regarding postoperative prophylaxis or evidence to support risk stratification. Methods: A 2-part study assessing the incidence and factors for the development of VTE was conducted: (1) a retrospective observational cohort study of 22 486 adults to calculate the overall incidence following foot and/or ankle surgery from January 2008 to May 2011 and (2) a retrospective matched case-control study to identify risk factors for development of VTE postsurgery. One control per VTE case matched on age and sex was randomly selected from the remaining patients. Results: The overall incidence of VTE was 0.9%. Predictive risk factors in bivariate analyses included obesity, history of VTE, history of trauma, use of hormonal replacement or oral contraception therapy, anatomic location of surgery, procedure duration 60 minutes or more, general anesthesia, postoperative nonweightbearing immobilization greater than 2 weeks, and use of anticoagulation. When significant variables from bivariate analyses were placed into the multivariable regression model, 4 remained statistically significant: adjusted odds ratio (aOR) for obesity, 6.1; history of VTE, 15.7; use of hormone replacement therapy, 8.9; and postoperative nonweightbearing immobilization greater than 2 weeks, 9.0. The risk of VTE increased significantly with 3 or more risk factors ( P = .001). Conclusion: The overall low incidence of VTE following foot and ankle surgery does not support routine prophylaxis for all patients. Among patients with 3 or more risk factors, the use of chemoprophylaxis may be warranted. Level of Evidence: Level III, retrospective case series.

scholarly journals Modified Langenskiöld procedure for chronic, recurrent, and congenital patellar dislocation

2020 ◽  
Vol 14 (4) ◽  
pp. 318-329
Author(s):  
Omar Ramos ◽  
Corey Burke ◽  
Molly Lewis ◽  
Martin J. Morrison ◽  
Dror Paley ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Patellar Dislocation ◽  
Case Series ◽  
Retrospective Case ◽  
Level Of Evidence ◽  
Full Extension ◽  
Chronic Group ◽  
Patellar Maltracking ◽  
Kujala Score ◽  
One Year

Purpose Langenskiöld described a reconstructive soft-tissue procedure for irreducible lateral congenital patellar dislocations. Paley further detailed the technique in the surgical management of congenital femoral deficiency. The aim of this study was to evaluate the outcomes of patients with congenital, chronic and recurrent patellar dislocations treated with the modified Langenskiöld procedure. Methods This is a retrospective case series. Between 2011 and 2018, 18 knees in 13 patients (mean age 15.8 years (sd 4.4; 12 to 29.9), nine female) with diagnoses of recurrent (six patients, eight knees), chronic (four patients, six knees) and congenital (three patients, four knees) patellar dislocations were treated with the modified Langenskiöld procedure. Results There were no recurrent lateral dislocations in the congenital or recurrent groups. One of the patients in the congenital group had an overcorrection with some medial patellar maltracking but until this time has not required any further surgery. In the chronic group two of the six knees developed further dislocations; these were both on the same patient, who had no dislocations until one year after surgery. Mean Kujala score was 83.7 (sd 17; 47 to 100) for all groups. In spite of preoperative knee flexion contractures of up to 30° in three patients (six knees), all patients had full extension postoperatively. Eight patients reported being satisfied with their outcome, one was somewhat satisfied, two were very dissatisfied, and two did not respond. Conclusion The modified Langenskiöld reconstruction provides a powerful correction for challenging cases of congenital and recurrent patellar dislocations. Re-dislocation as well as overcorrection can occasionally occur. Level of Evidence Level IV

How Does Isolated Medial Patellofemoral Ligament Reconstruction Influence Patellar Height?

2020 ◽  
Vol 48 (4) ◽  
pp. 895-900 ◽  
Author(s):  
Francesco Luceri ◽  
Julien Roger ◽  
Pietro Simone Randelli ◽  
Sébastien Lustig ◽  
Elvire Servien
Keyword(s):  
Patellar Instability ◽  
Medial Patellofemoral Ligament ◽  
Case Series ◽  
Patellofemoral Instability ◽  
Patellar Height ◽  
Patella Alta ◽  
Level Of Evidence ◽  
Normal Limits ◽  
Patient Reported ◽  
History Of

Background: Reconstruction of the medial patellofemoral ligament (MPFL) is the gold standard treatment for recurrent patellar dislocation. Patella alta has been reported in about half of patients with recurrent patellofemoral instability. Hypothesis: MPFL reconstruction (MPFLr) has a beneficial role in the correction of patellar height in patients with mild patella alta (Caton-Deschamps index [CDI] between 1.20 and 1.40). Study Design: Case series; Level of evidence, 4. Methods: Skeletally mature patients, with no history of previous or concomitant knee surgical procedures, who underwent isolated MPFLr using hamstring autograft for recurrent patellar instability between 2005 and 2018, were included in this study. The authors calculated CDI, modified Insall-Salvati index (MISI), and Blackburne-Peel index (BPI) ratios. Measurements done by 2 independent observers were calculated and used to compare pre- and postoperative patellar height (patella alta: CDI >1.20). Results: A total of 89 patients (95 knees) were included in the study, with a mean age of 25.0 years (range, 15.0-45.0 years). There were 70% women and 30% men. We found patella alta in 35.8% of cases preoperatively. Among them, 79.4% had reduced patellar height indices, within normal limits, postoperatively (mean follow-up, 18.4 ± 12.0 months). All the ratios showed a significant reduction in patellar height after surgery (CDI: 0.19 [range, –0.05, 0.60]; MISI: 0.22 [–0.14, 0.76]; BPI: 0.18 [–0.08, 0.59]; P < .00001). The CDI of 79.4% of the study knees was reduced to within normal limits postoperatively. The CDI was maintained within normal limits postoperatively in 93.4% of the knees with normal patellar height and reduced to normal in 50% of the knees with severe patella alta before surgery . No patient reported patella infera before surgery, whereas this condition was found in 8.2% of study patients postoperatively. A moderate correlation was reported between preoperative radiographic indices and their reduction after surgery (CDI: P < .001, ρ = 0.39; MISI: P < .001, ρ = 0.39; BPI: P < .001, ρ = 0.48). Conclusion: The higher the preoperative patellar height, the more important is the lowering effect of MPFLr using the hamstring for patellar instability. Bony procedures should not be indicated in patients with patellar instability and a CDI between 1.20 and 1.40.

A Modified Capsular Shift for Atraumatic Anterior-Inferior Shoulder Instability

2005 ◽  
Vol 33 (7) ◽  
pp. 1011-1015 ◽  
Author(s):  
Björn Marquardt ◽  
Wolfgang Pötzl ◽  
Kai-Axel Witt ◽  
Jörn Steinbeck
Keyword(s):  
Shoulder Instability ◽  
Case Series ◽  
Consecutive Series ◽  
Study Group ◽  
Level Of Evidence ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Capsular Shift ◽  
Redislocation Rate

Purpose To evaluate the long-term outcome of a modified inferior capsular shift procedure in patients with atraumatic anterior-inferior shoulder instability by analyzing a consecutive series of patients who had undergone a modified inferior capsular shift for this specific type of shoulder instability. Study Design Case series; Level of evidence, 4. Methods Between 1992 and 1997, 38 shoulders of 35 patients with atraumatic anterior-inferior shoulder instability that were unresponsive to nonoperative management were operated on using a modified capsular shift procedure with longitudinal incision of the capsule medially and a bony fixation of the inferior flap to the glenoid and labrum in the 1 o'clock to 3 o'clock position. The patient study group consisted of 9 men and 26 women with a mean age of 25.4 years (range, 15-55 years) at the time of surgery. The mean follow-up was 7.4 years (range, 4.0-11.4 years); 1 patient was lost to follow-up directly after surgery. The study group was evaluated according to the Rowe score. Results After 7.4 years, 2 patients experienced a single redislocation or resubluxation, 1 patient had recurrent dislocations, and 1 patient had a positive apprehension sign, which is an overall redislocation rate of 10.5%. The average Rowe score increased to 90.6 (SD = 19.7) points from 36.2 (SD = 13.5) points before surgery. Seventy-two percent of the patients participating in sports returned to their preoperative level of competition. Conclusions Results in this series demonstrate the efficacy and durability of a modified capsular shift procedure for the treatment of atraumatic anterior-inferior shoulder instability.

The 3-in-1 Procedure for Recurrent Dislocation of the Patella in Skeletally Immature Children and Adolescents

2009 ◽  
Vol 37 (9) ◽  
pp. 1814-1820 ◽  
Author(s):  
Francesco Oliva ◽  
Mario Ronga ◽  
Umile Giuseppe Longo ◽  
Vittorino Testa ◽  
Giovanni Capasso ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Patellar Dislocation ◽  
Case Series ◽  
Skeletal Maturation ◽  
Isokinetic Strength ◽  
Skeletally Immature ◽  
Recurrent Patellar Dislocation ◽  
Level Of Evidence ◽  
The Mean

Background Recurrent patellar dislocations are common injuries in children and adolescents. The subjective and functional results of soft tissue surgical management in a population that was skeletally immature at the time of surgery have not been reported. Hypothesis The 3-in-1 procedure is an effective treatment for recurrent patellar dislocation in skeletally immature patients. Study Design Case series; Level of evidence, 4. Methods Twenty-five skeletally immature patients (age at operation, 13.5 ± 3.8 years) who were practicing sports and suffering from recurrent unilateral patellar dislocation were included in the study and followed until skeletal maturation. Clinical evaluation included the modified Cincinnati rating system and the Kujala score, anthropometry, plain radiography, and isokinetic dynamometry. Results The average follow-up was 3.8 years (range, 2.5-6 years). The mean modified Cincinnati score increased from 51.7 ± 12.6 preoperatively to 94.3 ± 10.8 (P < .02), while the mean Kujala scores increased from 52.4 ± 12.7 preoperatively to 93.8 ± 14.2 (P < .02). The Insall-Salvati index remained essentially unchanged, being 1.04 ± 0.2 preoperatively and 1.02 ± 0.3 at latest follow-up. Significant differences were found between the operated and the contralateral limb in the various isokinetic strength variables at all angular velocities measured at the latest follow-up (.05 < P < .0042). Conclusion The 3-in-1 procedure is a safe, reliable management option for recurrent patellar dislocation in skeletally immature patients. Side-to-side differences in isokinetic strength and in anthropometric indices persist despite subjective success of the procedure.

The Chronister Protocol: Early Experience With Immediate Immobilization in Flexion and Rapid Return to Play After Acute Lateral Patellar Dislocation

2015 ◽  
Vol 20 (4) ◽  
pp. 16-22
Author(s):  
Raymond Chronister ◽  
George C. Balazs ◽  
Adam Pickett ◽  
John-Paul H. Rue ◽  
David J. Keblish
Keyword(s):  
Outcome Measures ◽  
Knee Flexion ◽  
Patellar Dislocation ◽  
Case Series ◽  
Return To Sport ◽  
Collegiate Athletes ◽  
Return To Play ◽  
Full Extension ◽  
Knee Stiffness ◽  
Lateral Patellar Dislocation

Context:Acute lateral patellar dislocation is a common injury sustained by athletes, and often requires several months to recover and return to play.Objective:To describe a novel protocol for the treatment of acute lateral patellar dislocation that returns patients to play far sooner than traditional treatment protocols.Design:Case series and review of the literature.Setting:Division I NCAA institution.Patients:Two collegiate athletes who sustained first-time acute lateral patellar dislocations.Interventions:Traditional standard of care for acute lateral patellar dislocation after reduction involves 1–7 weeks of immobilization in full extension. Knee stiffness commonly results from this method, and return to full activity typically takes 2–4 months. We used a protocol involving immobilization in maximal flexion for 24 hr, with early aggressive range of motion and quadriceps strengthening in the first week after injury.Main Outcome Measures:Time to return to play.Results:Immediate on-site reduction of the patella followed by 24 hr of immobilization in maximal knee flexion was performed. Following an accelerated rehabilitation regimen, patients were able to return to sport an average of 3 days postinjury. Neither patient has experienced a recurrent dislocation.Conclusions:Our protocol is based on anatomic studies demonstrating reduced tension on the medial patellofemoral ligament, reduced hemarthrosis, and reduced soft tissue swelling in maximal knee flexion. This method apparently bypasses the knee stiffness and deconditioning commonly seen with traditional nonoperative regimens, allowing return to sport weeks or months sooner.

Patellar Instability Management: A Survey of the International Patellofemoral Study Group

2017 ◽  
Vol 46 (13) ◽  
pp. 3299-3306 ◽  
Author(s):  
Joseph N. Liu ◽  
Michael E. Steinhaus ◽  
Irene L. Kalbian ◽  
William R. Post ◽  
Daniel W. Green ◽  
...  
Keyword(s):  
Patellar Instability ◽  
Online Survey ◽  
Patellofemoral Instability ◽  
Lateral Release ◽  
Study Group ◽  
Current Standard ◽  
Level Of Evidence ◽  
Consensus Statements ◽  
High Level ◽  
First Time

Background: Although patellofemoral instability is among the most prevalent knee disorders, the management of patients with this condition is complex and remains variable, given the lack of long-term, high-level clinical outcome studies to compare various operative and nonoperative modalities. Purpose: To discover a consensus within treatment controversies in patellofemoral instability among experienced knee surgeons with a specific interest in the patellofemoral joint. Study Design: Expert opinion; Level of evidence, 5. Methods: A 3-step modified Delphi technique was used to establish a consensus. A 34-question, case-based online survey regarding patellofemoral instability was distributed to all active members of the International Patellofemoral Study Group. Consensus statements were generated if at least 66% of the respondents agreed and then redistributed to the same panel. Modifications to the consensus statements were made based on the iterative feedback process until no discordance was encountered in the third stage. Results: Eight consensus statements were achieved. Nonoperative management is the current standard of care for a first-time dislocation in the absence of an osteochondral fragment or loose body requiring excision (100% agreement). In patients with a first-time dislocation with an operative osteochondral fracture requiring excision or repair, patellar instability should be addressed concurrently (89% agreement). Recurrent instability should be treated surgically, with most surgeons favoring medial reconstruction (77%-86% agreement). While there is general agreement that bony procedures should be performed to correct underlying bony deformities, there is no consensus regarding the most appropriate type of procedure performed. Lateral release should not be performed in isolation for the treatment of patellar instability (89% agreement). Conclusion: Despite the consensus generated in this study, our current understanding remains limited by a lack of high-level evidence as well as the numerous complex variables influencing treatment decision making. High-quality, multicenter randomized controlled trials, particularly those directly comparing specific surgical treatment methods while controlling for underlying risk factors, are needed to address these areas of uncertainty.

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