{"id":10413,"date":"2022-04-09T12:35:50","date_gmt":"2022-04-09T10:35:50","guid":{"rendered":"https:\/\/www.physiotutors.com\/?post_type=wiki&p=10413"},"modified":"2022-04-09T12:35:50","modified_gmt":"2022-04-09T10:35:50","slug":"reverse-lachman-test","status":"publish","type":"wiki","link":"https:\/\/www.physiotutors.com\/wiki\/reverse-lachman-test\/","title":{"rendered":"Reverse Lachman Test"},"featured_media":10414,"template":"","class_list":["post-10413","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"sections":[{"acf_fc_layout":"page-header-detail-page","background":{"background_image":10414,"background_image_alt_text":"Reverse Lachman Test"},"heading":"Valgus Stress Test for MCL Injuries","subheading":"Knee Assessment","content_editor":"","button_type":"internal_link","button_label":"Check our shop","button_style":"button-five","button_internal_link":4646,"button_anchor":"","button_url":"","button_file":"","label":""},{"acf_fc_layout":"submenu","links":[{"button_type":"anchor","button_label":"Learn","button_internal_link":null,"button_anchor":"section-number-3","button_url":"","button_file":null},{"button_type":"anchor","button_label":"Assessment E-Book","button_internal_link":null,"button_anchor":"section-number-4","button_url":"","button_file":null},{"button_type":"anchor","button_label":"Reviews","button_internal_link":null,"button_anchor":"section-number-5","button_url":"","button_file":null}],"dropdown_label":"Go to","button_right":{"button_type":"internal_link","button_label":"Become a member","button_style":"button-three","button_internal_link":16662,"button_anchor":"","button_url":"","button_file":""},"button_description":"Find this wiki on the Physiotutors platform"},{"acf_fc_layout":"content-content","section_options":{"vertical_alignment":"top","column_right_box":false,"column_left_width":"col-12 col-lg-4 offset"},"column_left":{"content_editor":"

Learn<\/h4>"},"column_right":{"content_editor":"

Reverse Lachman Test | Posterior Cruciate Ligament Tear Assessment<\/h2>\nThe PCL provides maximum resistance to posterior tibial translation When the knee is at 90\u00b0 of flexion.\nHowever, the Posterior Drawer Test can be difficult to perform in the acutely injured knee because the patient experiences discomfort during knee flexion.\n\nIn those situations, the Reverse Lachman Test may be useful. According to Rubinstein et al. (1994)<\/a>, The Reverse Lachman Test has a Sensitivity of 63% and a Specificity of 89%.\nFor this reason, it has a moderate clinical value to confirm a PCL Tear, although we have found only one study to evaluate its validity yet.\n
\n\n[embed]https:\/\/www.youtube.com\/watch?v=uBFV1Fdtj4w[\/embed]\n\n<\/div>\nTo perform the Reverse Lachman Test have your patient in supine line position with the knee flexed to 30\u00b0. You can stabilize this position by placing your knee under it.\nThen place your contralateral hand on the femur from lateral and the ipsilateral hand on the Tibia from medial like in a normal Lachman test. Both hands are close to the joint line as we want to translate and not angulate.\nThe Tibia must be anatomically reduced in the PCL deficient knee at the start of this test. Rotation is neutral to avoid the recruitment of secondary stabilizers.\nThen exert a posteriorly directed force to the tibia and feel for end feel and the degrees of translation\n\nThis test is positive if the end feel Is soft or absent, all with an increased posterior translation of the tibia compared to the other side.\n\nLubowitz et al. (2008)<\/a> described a grading for a posterior translation:\n