VAISMAN BURUCKER, ALEJANDRO ESTEBAN

Preferred name
VAISMAN BURUCKER, ALEJANDRO ESTEBAN
Main Affiliation
Email
a.vaisman@udd.cl
ORCID
0000-0002-9783-5199
Scopus Author ID
16025944900

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      1Scopus© Citations 3
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    Meniscus allograft transplantation: indications, techniques and outcomes
    (2019)
    FIGUEROA BERRIOS, FRANCISCO JAVIER  
    ;
    FIGUEROA POBLETE, DAVID HUMBERTO  
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    CALVO RODRIGUEZ, RAFAEL  
    ;
    Alex Vaisman  
    ;
    JoĂŁo Espregueira-Mendes
    <jats:p> New indications for meniscal allograft transplantation (MAT) are being added, but the general expert opinion is that it is still a procedure reserved for symptomatic meniscal loss. Lateral MAT has better clinical outcomes and less failure risk compared to medial MAT. Ideal conditions (low-grade chondral lesions) make MAT a more survivable and successful procedure. Meniscal extrusion after MAT is common and does not seem to alter results. Midterm survivorship of a MAT is reported to be 85–90%, while long-term survivorship decreases to 50–70% depending on chondral status and concomitant procedures. Even if the procedure is a success, there are high possibilities of not being able to resume sports activities. </jats:p><jats:p> Cite this article: EFORT Open Rev 2019;4:115-120. DOI: 10.1302/2058-5241.4.180052 </jats:p>
      2Scopus© Citations 55
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      1Scopus© Citations 6
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    Early Postoperative Results in Robotic-Arm-Assisted Total Knee Replacement versus Conventional Technique: First Latin American Experience
    (2023)
    David Figueroa  
    ;
    Rodrigo Guiloff
    ;
    Tomas Prado
    ;
    Loreto Figureoa
    ;
    Juan Jose Sotomayor
    <jats:title>Abstract</jats:title><jats:p>Early results with robotic-arm-assisted total knee arthroplasty (TKA) are encouraging; nevertheless, literature might be unrepresentative, as it comes mostly from American, European, and Asian countries. There is limited experience and no comparative clinical reports in Latin America, a region of mainly low- and middle-income countries with limited access to these promising technologies. This study aims to compare the early postoperative results of the first Latin American experience with robotic-arm-assisted TKA versus conventional TKA. A cohort study was performed, including 181 consecutive patients (195 knees) with advanced symptomatic knee osteoarthritis (OA) undergoing primary TKA between March 2016 and October 2019. The cohort included 111 consecutive patients (123 knees) undergoing conventional TKA, followed by 70 consecutive patients (72 knees) undergoing robotic-arm-assisted TKA. The same surgical team (surgeon 1 and surgeon 2) performed all procedures. Patients with previous osteotomy, posttraumatic OA, and revision components were not considered. The same anesthetic and rehabilitation protocol was followed. The investigated clinical outcomes (for the first 60 postoperative days) were: surgical tourniquet time, time to home discharge, time to ambulation, postoperative daily pain (Visual Analog Scale), opioid use, range of motion, blood loss, complications, and postoperative mechanical axis. The early clinical postoperative results of this first Latin American comparative experience of robotic-arm-assisted TKA versus conventional technique showed lower opioids requirements and faster functional recovery of ambulation in those patients operated with the robotic system; nevertheless, surgical times were higher, without differences in total postoperative complications and other clinical outcomes.</jats:p>
      5Scopus© Citations 3
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      3Scopus© Citations 10
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      1Scopus© Citations 59
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    A Novel Radiographic Index for the Diagnosis of Posterior Acromioclavicular Joint Dislocations
    (2014)
    Alex Vaisman  
    ;
    Ignacio Eduardo VillalĂłn Montenegro
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    MarĂ­a JesĂşs Tuca De Diego
    ;
    Juanjose Valderrama Ronco
    <jats:sec><jats:title>Background:</jats:title><jats:p>Posterior acromioclavicular (AC) joint dislocations are frequently misclassified because posterior translation of the clavicle is difficult to evaluate in Zanca radiograph views. A novel radiographic index was used in this study to accurately diagnose posterior dislocations of the AC joint.</jats:p></jats:sec><jats:sec><jats:title>Hypothesis:</jats:title><jats:p>This novel index has a high degree of accuracy for the diagnosis of posterior AC joint dislocations.</jats:p></jats:sec><jats:sec><jats:title>Study Design:</jats:title><jats:p>Cohort study (diagnosis); Level of evidence, 2.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>This was an analytic, descriptive study of 150 patients with different grades of AC injuries according to the Rockwood classification (30 patients for each grade of injury: I, II, III, IV, and V). The diagnosis of an AC injury was made both clinically and radiographically by using comparative Zanca and axillary views. Two measurements were performed in Zanca views: the coracoclavicular distance and the AC width distance. A width index was calculated for each patient. The Student t test, Bonferroni test, logistic regression, linear regression, and receiver operating characteristic (ROC) curves were used for statistical analysis. Forty cases were impartially selected to obtain a κ concordance value.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>The average value of the AC width index per group (according to the Rockwood classification) was as follows: type I, 2.1% (range, –12% to 25%); type II, 4.2% (range, –19% to 29%); type III, 19.1% (range, –59% to 91%); type IV, 110.3% (range, 47% to 181%); and type V, –3.8% (range, –71% to 62%). There was a significant difference between the average width index in the patients with type IV injuries and those in the remaining groups ( P &lt; .05). The ROC curve showed that a width index of 60% has a sensitivity of 95.7% and specificity of 97.5%, with a positive predictive value of 96.7% and negative predictive value of 95.6% to predict a type IV injury. Intraobserver reliability was rated as substantial agreement for each of 3 observers; the interobserver reliability of the 3 independent raters was almost perfect.</jats:p></jats:sec><jats:sec><jats:title>Conclusion:</jats:title><jats:p>An AC width index of ≥60% is highly accurate for the diagnosis of a posterior AC joint dislocation, with high intraobserver and interobserver concordance.</jats:p></jats:sec>
      11Scopus© Citations 13
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    Lower Limb Symmetry: Comparison of Muscular Power Between Dominant and Nondominant Legs in Healthy Young Adults Associated With Single-Leg-Dominant Sports
    (2017)
    Alex Vaisman  
    ;
    Rodrigo Guiloff
    ;
    Juan Rojas
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    DELGADO BECERRA, OROZIMBA IRIS  
    ;
    David Figueroa
    <jats:sec><jats:title>Background:</jats:title><jats:p>Achieving a symmetrical power performance (difference &lt;15%) between lower limbs is generally recommended during sports rehabilitation. However, athletes in single-leg-dominant sports, such as professional soccer players, could develop significant asymmetry between their dominant and nondominant legs, such that symmetry does not act as a viable comparison.</jats:p></jats:sec><jats:sec><jats:title>Purpose:</jats:title><jats:p>To (1) compare maximal muscular power between the dominant and nondominant legs in healthy young adults, (2) evaluate the effect of a single-leg-dominant sport activity performed at the professional level, and (3) propose a parameter of normality for maximal power difference in the lower limbs of this young adult population.</jats:p></jats:sec><jats:sec><jats:title>Study Design:</jats:title><jats:p>Controlled laboratory study.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>A total of 78 healthy, male, young adults were divided into 2 groups according to sport activity level. Group 1 consisted of 51 nonathletes (mean ± SD age, 20.8 ± 1.5 years; weight, 71.9 ± 10.5 kg) who participated in less than 8 hours a week of recreational physical activity with nonspecific training; group 2 consisted of 27 single-leg-dominant professional soccer players (age, 18.4 ± 0.6 years; weight, 70.1 ± 7.5 kg) who specifically trained and competed at their particular activity 8 hours or more a week. For assessment of maximal leg power, both groups completed the single-leg squat jump test. Dominance was determined when participants completed 2 of 3 specific tests with the same extremity. Statistical analysis included the Student t test.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>No statistical difference was found for maximal power between dominant and nondominant legs for nonathletes ( t = –1.01, P = .316) or single-leg-dominant professional soccer players ( t = –1.10, P = .281). A majority (95%) of participants studied showed a power difference of less than 15% between their lower extremities.</jats:p></jats:sec><jats:sec><jats:title>Conclusion:</jats:title><jats:p>Among young healthy adults, symmetrical power performance is expected between lower extremities independent of the existence of dominance and difference in sport activity level. A less than 15% difference in power seems to be a proper parameter to define symmetrical power performance assessed by vertical single-leg jump tests.</jats:p></jats:sec>
      2Scopus© Citations 38
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