Repair of locked bucket-handle meniscal tears in knees with chronic anterior cruciate ligament deficiency

BACKGROUND: Large bucket-handle meniscal tears in knees with chronic anterior cruciate ligament deficiency have been considered avascular and, thus, irreparable. HYPOTHESIS: The rate of meniscal healing is higher than previously reported. STUDY DESIGN: Prospective cohort study. METHODS: Fifty-nine patients underwent staged surgical procedures of meniscal repair followed at an average of 77 +/- 58 days by ligament reconstruction once full range of motion was obtained. RESULTS: Fifty-two patients with 55 meniscal repairs were available for follow-up. At reconstruction, 30 menisci (55%) appeared healed; 19 (34%), partially healed; and 6 (11%) showed no healing (only 4 were removed). Of 43 tears in the white-on-white zone, 21 appeared healed; 17, partially healed; and 5 showed no healing. Of 11 in the red-on-white zone, 8 appeared healed; 2, partially healed; and 1 showed no healing. One meniscal tear in the red-on-red zone appeared healed. At an average follow-up of 4.3 +/- 3.1 years, 36 of the 43 (83.7%) white-on-white meniscal repairs remained asymptomatic; all repairs in the other zones remained asymptomatic. CONCLUSION: Locked bucket-handle meniscal tears heal at a high rate when repaired as an isolated procedure, even when full weightbearing and activity before reconstruction is allowed and when the tear is in the white-on-white zone.     

前交叉韧带损伤合并内侧半月板桶柄样撕裂的临床治疗

目的:回顾性评估前交叉韧带(ACL)损伤合并内侧半月板桶柄样撕裂(BHT)的关节镜下修补疗效。方法:2002年5月~2007年2月,67例前交叉韧带损伤合并内侧半月板桶柄样撕裂手术病例。入选条件为:红-红区及红-白区损伤、具备可复位性、半月板组织无复合撕裂及明显变性,进行过二次手术探查。手术技术:前交叉韧带关节镜下重建。内侧半月板修补采用关节镜下联合修补方法:后体部至前体部区域采用标准的自内向外缝合技术,后部区域采用经两个后内侧入路的全关节内缝合技术。结果:平均随访40.6个月(12个月~70个月)。二次手术探查结果:完全愈合57例(85%),部分愈合3例(4.5%),不愈合7例(10.4%)。总体成功率(包括完全愈合与部分愈合)为89.5%。临床评估包括交锁、积液、关节间隙压痛、McMurray试验,其中无症状者59例(88%),关节间隙压痛者5例(7.5%),交锁复发3例(4.5%)。膝关节活动度检查显示,3例伸膝受限大于10°,1例出现止血带麻痹。结论:对于ACL合并内侧半月板红-红区及红-白区BHT,在重建ACL的同时采用关节镜下联合修补技术对BHT的全长范围进行有效修补,在平均40个月的随访期内,可以获得89.5%的总体成功率,包括85%的完全愈合率及4.5%的部分愈合率,失效率为10.4%。     

The incidence of healing in arthroscopic meniscal repairs in anterior cruciate ligament-reconstructed knees versus stable knees.

In this study, follow-up data was obtained in 90 of 117 consecutive meniscal repairs. In Group I, there were 68 meniscal repairs in conjunction with anterior cruciate ligament reconstruction, and in Group II, 22 isolated repairs in anterior cruciate ligament stable knees. Meniscal healing was assessed using the criteria established by Henning, by either arthroscopy or arthrography, at a mean of 7 months for isolated repairs and a mean of 10 months for repairs done in conjunction with anterior cruciate ligament reconstruction. Average time from injury to surgery was 19 months in Group I patients, and 14 months in Group II patients. The overall rate of successful healing was 82%. Group I repairs were successful 93% of the time compared to a 50% success rate in Group II (P less than 0.00005). Lateral meniscal repairs fared better than medial repairs in both groups. Although a smaller rim width yielded better overall healing, there was no difference in the mean rim width of the two groups. Patients with anterior cruciate ligament reconstruction did better than those with isolated meniscal repair, regardless of tear length. Older patients had better healing than younger ones. Overall, acute repairs were more successful than repairs of chronic tears. Even so, the chronic Group I patients had a 91% successful healing rate.     

Healing results of meniscal tears left in situ during anterior cruciate ligament reconstruction: a review of clinical studies

The presence of peripheral meniscal tears is common at the time of anterior cruciate ligament (ACL) reconstruction. Techniques to preserve the maximum amount of meniscal tissue include “non operative” management (tear left alone, without repair or removal), meniscus repair, partial meniscectomy. There is a lack of consensus guidelines about the management of peripheral stable meniscal tears. When to remove, let alone or repair? We performed an evidence-based review of the outcomes of stable meniscal tears left in situ during ACL surgery, in order to assess the effectiveness of this popular procedure. Clinical and anatomical results (arthrography or second look arthroscopy) were analyzed. Our literature search yielded ten relevant studies (9 level IV, 1 level III). The mean time of follow-up was 16 months. Pain or mechanical symptoms related to the medial tibiofemoral joint were reported in 0–66% of cases. Subsequent medial meniscectomy or repair were performed in 0–33% of cases. Pain or mechanical symptoms related to the lateral tibiofemoral joint were reported in 0–18% cases. Subsequent lateral meniscectomy or repair were performed in 0–22% cases. A complete healing occurred in 50–61% cases for the medial meniscus and in 55–74% cases for the lateral meniscus. No definite conclusion can be made with regard to these results. The conservative approach is more effective for lateral menisci. The rate of bad results for the medial meniscus remains high when a conservative treatment is used. For the medial meniscus, repair of stable peripheral tears may be always indicated to decrease the risk of postoperative pain or subsequent meniscectomy.     

Arthroscopic meniscal repair using T-fix

We evaluated the arthroscopic meniscal repair using T-fix and present our preliminary results. The series included 47 consecutive patients who underwent meniscal repair using T-fix. Mean follow-up was 26 months (range 12-42 months). The overall number of T-fixes used in the repairs was 163, with a mean of three (range two to five) per patient. Patients were evaluated according to the modified Marshall scoring system. Results were rated as excellent in 32, good in 10, fair in 2, and poor in 3 patients. Second-look arthroscopy was performed in 18 patients as the part of our protocol. In 15 patients meniscal tears were considered to be healed, according to Henning's criteria. Six of those who underwent anterior cruciate ligament reconstruction healed completely. There were no neurovascular complications. Repair of the menisci using T-fix proved successful and reliable. In view of satisfactory functional results and the observation of healing of tears on second-look arthroscopy, we believe that preservation and repair of menisci should be attempted in appropriate cases.     

All-inside meniscal repair using a new flexible, tensionable device

BACKGROUND: A new generation of flexible all-inside meniscal repair devices is available, but clinical studies with these devices are lacking. HYPOTHESIS: The RapidLoc has an intermediate-term meniscal healing rate that is equivalent to literature reports of inside-out suture technique in patients undergoing concurrent anterior cruciate ligament reconstruction. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Retrospective analysis was performed for 75 meniscal tears in 66 consecutive patients undergoing anterior cruciate ligament reconstruction who underwent meniscal repair with the RapidLoc. Patients with at least 2 years' follow-up were evaluated for symptoms suggestive of a meniscal tear and were assessed with the International Knee Documentation Committee form and the Knee Disorders Subjective History visual analog scale. Subjects were asked to return for a clinical examination to include evaluation for an effusion and joint line tenderness as well as McMurray test and KT-1000 arthrometry readings. Patients with symptoms consistent with meniscal repair failure underwent magnetic resonance arthrography and repeat arthroscopy. RESULTS: Twenty patients with 21 meniscal tears were excluded, resulting in 54 meniscal tears in 46 patients. At a mean follow-up of 34.8 months, the clinical success rate for meniscal repair was 90.7% (49/54), with 5 failures requiring meniscectomy. Univariate analysis revealed predictive variables for failure: bucket-handle configuration, multiplanar tears, tear length greater than 2 cm, and chronicity longer than 3 months. Non-predictive variables included compartment, zone, ligament graft choice, gender, age, follow-up, and visual analog scale score. Analysis of healed patients revealed a negative correlation between chronicity of tear and International Knee Documentation Committee score. CONCLUSIONS: The RapidLoc has an acceptable intermediate-term clinical healing rate in patients undergoing concurrent anterior cruciate ligament reconstruction. Predictive variables for failure should be considered during operative decision making.     

Change in meniscal strain with anterior cruciate ligament injury and after reconstruction

Meniscal injury has been well documented in association with injury to the anterior cruciate ligament. The purpose of this study was to evaluate the effect of anterior cruciate ligament transection and reconstruction on meniscal strain. Four differential variable reluctance transducer strain gauges were placed in the medial and lateral menisci of nine cadaveric knees. Each specimen was mounted to a six-degree-of-freedom knee testing device. Testing was conducted with the knee fully extended and at 45 degrees and 90 degrees of flexion, both with and without applied axial load. At each angle of flexion, an anterior and posterior tibial load was applied. Next, the anterior cruciate ligament was transected and the testing sequence was repeated. Finally, the ligament was reconstructed using a central one-third patellar tendon graft and the testing sequence was repeated. The results demonstrated statistically significant increases in meniscal strain in ligament-transected knees compared with intact specimens. A reduction in meniscal strain to a level similar to that detected in the ligament-intact knees was observed after anterior cruciate ligament reconstruction. These results have important clinical implications regarding the potentially deleterious effect of the anterior cruciate ligament-deficient knee on meniscal strain and the potential benefit of anterior cruciate ligament reconstruction.     

Accuracy of MRI patterns in evaluating anterior cruciate ligament tears

 The purpose of this study was to determine the different patterns of anterior cruciate ligament (ACL) tears on MRI and the prevalence and accuracy of these patterns. Images were obtained on high-tesla and low-tesla units and the results compared to determine whether field strength affects the interpretation using the grading system. In 172 patients who underwent knee MRI (109 knees with high-tesla units and 63 knees with low-tesla units) and arthroscopy, there was a total of 91 arthroscopically proven ACL tears. Five patterns of ACL tears were observed and designated as type 1 (diffuse increase in signal on T2-weighted images and enlargement of the ligament, 48%); type 2 (horizontally oriented ACL, 21%); type 3 (nonvisualization of the ACL, 18%); type 4 (discontinuity of the ACL, 11%); and type 5 (vertically oriented ACL, 2%). The positive predictive value (PPV) for type 2, 4, and 5 patterns was 100% for both field strengths; for type 3 PPV was just above 80% for both field strengths. The PPV value for type 1 was 90% for the high-tesla unit and 79% for the low-tesla, unit, which was not statistically significant. Combining the results of both field strengths, the overall sensitivity and specificity were 93% and 89%, respectively. Arthroscopic results were also used to determine the association between meniscal and ACL tears. Only 13% of ACL tears were isolated, the rest being associated with meniscal tears. Forty-five percent of medial meniscal and 50% of lateral meniscal tears were associated with an ACL tear, and 94% of ACLs were torn when both menisci were torn.     

MR imaging of the knee. Part I. Traumatic disorders

One hundred thirty patients with a diversity of knee joint injuries were evaluated with a high-resolution magnetic resonance (MR) imaging technique. The authors report the accuracy of this technique in the evaluation of 105 patients with suspected meniscal tears, 26 patients with suspected cruciate ligament tears, and eight patients with suspected patellar tendon injuries. Of those menisci rated as definitely or probably torn on MR imaging, 80% were found to be torn at subsequent arthroscopy. The predictive value of negative MR imaging results was 100%. MR imaging was 92% accurate in predicting the clinical outcome in patients with suspected meniscal tears who did not undergo surgery. MR permitted complete disruption of the patellar tendon to be differentiated from partial tears, ligamentous inflammation, and localized effusion of the infrapatellar bursa. Injuries to the anterior and posterior cruciate ligaments were identified on MR images, and the status of synthetic grafts of the anterior cruciate ligament was ascertained.     

半月板大桶柄样撕裂的关节镜下联合修补技术

目的:介绍关节镜下自内向外缝合技术联合全内缝合技术修补半月板的手术方式(联合修补技术),探讨修补半月板大桶柄样撕裂的安全、可靠方法。方法:2002年5月~2006年1月,采用关节镜下联合修补技术修补93例患者的96个半月板大桶柄样撕裂,均累及半月板后角至前角与体部交界处(前体部)区域。手术适应症:红-红区及红-白区损伤、具备可复位性、半月板组织无复合撕裂及明显变性、前十字韧带(ACL)完整或同时重建。手术技术:撕裂的后角与体部交界处(后体部)至中、前1/3区域采用标准的自内向外缝合技术:在半月板上、下表面交错进行垂直褥式缝合,膝后内侧或后外侧作辅助安全切口保护血管神经,伸膝位将缝线在关节囊浅层打结固定;撕裂的后部区域采用全关节内缝合技术:经两个后内侧或后外侧入路在关节内完成垂直褥式缝合、打结及剪线。单纯的红-白区撕裂修补后局部植入血凝块促进愈合,合并前十字韧带损伤者同时行韧带重建手术。术后对93例患者中的49例共51个半月板进行了平均20·1个月(9·2个月~54·2个月)的随访。随访时均进行了临床评估,包括交锁、积液、关节间隙压痛、McMurray试验。随访结果显示:49例患者中,无症状者46例(93·9%),关节间隙压痛者2例(4·1%),交锁复发1例(2%)。51个半月板中的44个(86·3%)经MRI复查,结果为:30个(68·2%)完全愈合,13个(29·5%)部分愈合,1个(2·3%)不愈合。38例患者共40个半月板(78·4%)经过二次手术探查,完全愈合者36个(90%),部分愈合者2个(5%),不愈合行半月板切除者2个(5%)。膝关节活动度检查显示3例伸膝受限>10°。结论:对于发生在红-红区或红-白区的大型半月板撕裂,采用自内向外与全关节内两种缝合技术可以保证撕裂的全长区域获得有效、稳定的修补,并且与ACL重建同期进行,可以获得很好的主、客观临床疗效。联合修补技术是安全、可靠的半月板大桶柄样撕裂的修补方法。     

Meniscal repair compared with meniscectomy for bucket-handle medial meniscal tears in anterior cruciate ligament-reconstructed knees

BACKGROUND: Repair of meniscal tears is generally preferred over meniscectomy. HYPOTHESIS: Repair of unstable bucket-handle tears of the medial meniscus leads to better outcomes than partial meniscectomy. STUDY DESIGN: Retrospective review of prospectively collected data. METHODS: We reviewed the records of 155 patients who had isolated bucket-handle medial meniscal tears and anterior cruciate ligament tears. Fifty-six menisci were repaired; 99 that were degenerative and crushed beyond repair were removed. Patients were evaluated at a mean follow-up of 6 to 8 years after surgery with the International Knee Documentation Committee examination and a modified Noyes questionnaire. RESULTS: The mean subjective scores were similar for patients in both the repair (N = 51) and meniscectomy (N = 87) groups. However, in the repair group, the mean subjective score of 93.9 for nondegenerative menisci was significantly better than the 87.1 for degenerative menisci. Objective grades for 25 patients in the repair group were normal or nearly normal in 22 patients (88%) and for 51 of 56 patients (91%) in the removal group. Radiographic subscores for the repair group were normal or nearly normal in 23 patients in the repair group and 49 in the removal group. CONCLUSION: Outcomes from meniscal repair were not superior to those from partial removal. Patients with repaired degenerative tears had significantly lower subjective scores than those with nondegenerative tears.     

Radial tears in the roots of the posterior horns of both the medial and lateral menisci combined with anterior cruciate ligament tear: a case report

We report a rare case of radial tears in the roots of the posterior horns of both the medial and lateral menisci associated with a chronic anterior cruciate ligament tear. Treatment included an arthroscopic pullout suture combined with anterior cruciate ligament reconstruction. At the 3-year postoperative follow-up, a second-look arthroscopic examination showed the posterior horns of both menisci to be well healed on the tibia. Manual knee laxity tests were negative and no side-to-side difference was detected by a KT-1000 arthrometer. The patient was able to perform outdoor activities without residual symptoms.     

Diagnosis of cruciate ligament injury using single contrast arthrography

To evaluate the accuracy of arthrography for assessing the status of the anterior cruciate ligament (ACL), 212 arthrograms from 212 knees in 205 consecutive patients undergoing single contrast arthrography and subsequent arthroscopy or arthrotomy were reviewed. Criteria for evaluation of the ACL included the clarity of its radiographic appearance as well as the anterior laxity of the knee as seen on manual stress views. Of the 111 knees having intact ACLs at surgery, 98 (88%) were evaluated correctly by arthrography. Of the 101 knees having a damaged ACL, 85 were read as torn or attenuated on the arthrogram. When the torn and attenuated ligaments were considered separately, accuracy was decreased. Of the 87 ligaments actually torn, 68 (78%) were read as torn and 9 (10%) as attenuated. Of the 14 actually attenuated, 5 (36%) were read as attenuated and 3 (21%) as torn. Of 114 arthrograms read as intact, 98 (86%) were correct. Of 77 arthrograms read as torn, 68 (88%), were correct. Of 21 arthrograms read as attenuated, 5 (24%) were correct. Of 114 torn medial menisci, 112 (98%) were correctly diagnosed, as were 38 (69%) of 55 torn lateral menisci. Sixteen of the 17 missed lateral meniscus tears were in knees with torn medial menisci. Single contrast arthrography is, therefore, highly accurate in distinguishing intact from damaged ACLs. The distinction between torn and attenuated ligaments, however, is not valuable.     

Patterns of meniscal injury with acute anterior cruciate ligament tears

One hundred two patients underwent an arthrotomy for the primary repair of an acute ACL tear with or without an associated collateral ligament injury. The mean age was 23 years. Forty-seven patients (46%) had meniscal injuries. Meniscal injuries were found in 41% of Group I patients (isolated ACL injuries) and in 54% of Group II patients (injured ACL/collateral ligaments). Twenty-eight medial and 22 lateral meniscal tears were noted. Twenty-six of the 50 meniscal tears (52%) were sutured in an attempt to repair the menisci. Of these, 20 of the medial (71%), and 6 of the lateral (27%) meniscal injuries were sutured. No patients in this series required a total meniscectomy. A thorough evaluation of the menisci is mandatory in knees with an acutely injured ACL.     

Magnetic resonance diagnosis of meniscal tears in patients with acute anterior cruciate ligament tears

OBJECTIVE: To evaluate the accuracy of magnetic resonance imaging in the diagnosis of meniscal tear in patients with acute anterior cruciate ligament tears. METHODS: Magnetic resonance images obtained from 41 patients imaged within 6 weeks of injury who had acute anterior cruciate ligament tears identified at arthroscopy were retrospectively reviewed for meniscal tear. RESULTS: With MR imaging the sensitivity, specificity and accuracy for diagnosing meniscal tears in the presence of acute anterior cruciate ligament tears were 71%, 93%, and 88%; for the lateral meniscal tears were 57%, 100% and 85%; and for the medial meniscal tears were 100%, 88%, 90%. All false negative cases (n = 6) involved the posterior horn of the lateral meniscus. CONCLUSION: In the presence of acute anterior cruciate ligament tears, MRI imaging has relatively low sensitivity for detecting meniscal tears due to missed tears in the lateral meniscus.     

The quadruple cruciate sign of simultaneous bicompartmental medial and lateral bucket-handle meniscal tears

We report the second known case of bicompartmental bucket-handle tears of the medial and lateral menisci and the first documented case of the bucket-handle tears occurring simultaneously following trauma, which occurred after a motorcycle accident. Both bucket-handle fragments were displaced into the intercondylar notch. An anterior cruciate ligament tear was also present. Coronal images demonstrated four structures in the intercondylar notch: the anterior and posterior cruciate ligaments and the medial and lateral bucket-handle meniscal fragments.     

Value of the coronal plane in MRI of internal derangement of the knee

Sagittal images usually receive the most scrutiny in the magnetic resonance evaluation of meniscal and anterior cruciate ligament tears. We assessed the relative contribution of the coronal view. All knee magnetic resonance examinations performed over a 2-year period that had surgical confirmation were reviewed with respect to the presence of meniscal and anterior cruciate ligament tears. The appearance of an attenuated but uninterrupted anterior cruciate ligament was also evaluated. The coronal and sagittal plane images were evaluated separately. The study included 68 medial menisci, 67 lateral menisci, and 71 anterior cruciate ligaments. The coronal view is especially useful in the evaluation of the lateral meniscus. An anterior cruciate ligament that appears attennated but uninterrupted should be considered intact. The anterior cruciate ligament may be evaluated on the coronal view. The coronal view should be regarded as similar to the lateral chest radiograph, which supplements, but does not replace, the frontal chest radiograph.Presented at the Annual Meeting of the Radiological Society of North America, December 2, 1992, Chicago, Illinois     

Arthroscopic repair of meniscal tears extending into the avascular zone in patients younger than twenty years of age

BACKGROUND: Limited data are available regarding repair results of meniscal tears extending into the central avascular region. HYPOTHESIS: Meniscal tears extending into the avascular region can be successfully repaired in patients less than 20 years old. STUDY DESIGN: Prospective cohort study. METHODS: We examined the results of 71 meniscal repairs (64 knees) for tears extending into the central avascular region in patients 19 years of age or younger; 67 were examined clinically (mean, 51 months after surgery) and 36, by follow-up arthroscopy (mean, 18 months). RESULTS: In 53 of 71 (75%) meniscal repairs patients had no tibiofemoral compartment symptoms and there were no clinical failures. In 18 (25%) meniscal repairs, patients showed tibiofemoral symptoms or a failed repair was detected on follow-up arthroscopy. In the subgroup of 45 knees with meniscal repair and anterior cruciate ligament reconstruction evaluated clinically, 39 (87%) patients rated their knee as normal or very good, 2 (4%) as good, 3 (7%) as fair, and 1 (2%) as poor. CONCLUSIONS: A stable repair of complex meniscal tears that extend into the avascular region can be obtained using a meticulous inside-out vertical divergent suture technique. We recommend repair, particularly in young active patients in whom removal of complex tears would result in major loss of meniscal function and the risk of future arthrosis.