{"id":1775,"date":"2021-06-15T11:55:00","date_gmt":"2021-06-15T15:55:00","guid":{"rendered":"https:\/\/www.drphilzeltzman.com\/blog\/?p=1775"},"modified":"2022-07-11T11:26:20","modified_gmt":"2022-07-11T15:26:20","slug":"10-deadly-sins-of-untreated-acl-tears","status":"publish","type":"post","link":"https:\/\/www.drphilzeltzman.com\/blog\/10-deadly-sins-of-untreated-acl-tears\/","title":{"rendered":"10 deadly sins of untreated ACL tears"},"content":{"rendered":"\n<p>Pet owners sometimes ask what would happen if we didn\u2019t address a torn anterior cruciate ligament (ACL). Dr. Google and random people will suggest conservative treatment as a perfectly valid option.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1285\" src=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Golden-retriever.jpg\" alt=\"A golden retriever\" class=\"wp-image-1778\" srcset=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Golden-retriever.jpg 1920w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Golden-retriever-1100x736.jpg 1100w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Golden-retriever-768x514.jpg 768w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Golden-retriever-1536x1028.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure><\/div>\n\n\n\n<p>A non-surgeon colleague even wrote elsewhere that since people often don\u2019t need surgery for an ACL tear, then we shouldn\u2019t need it in dogs. Respectfully, this shows a basic misunderstanding of the differences in functional anatomy between dogs and humans. Let\u2019s mention two:<\/p>\n\n\n\n<p>. Humans are straight legged. Dogs always have their knees flexed when standing.<\/p>\n\n\n\n<p>. The human tibial plateau angle is somewhere around 7 degrees. Dogs\u2019 tibial plateau angles vary from around 20 to over 60 degrees, with a back-of-the-envelope average of 24 to 28 degrees in most of my tibial plateau leveling osteotomy (TPLO) patients.<\/p>\n\n\n\n<p>How many reasonable, objective, ethical, honest reasons can you find to recommend conservative treatment as opposed to surgery?<\/p>\n\n\n\n<p>Here are 10 consequences of untreated ACL tears:<\/p>\n\n\n\n<p>1. Pain<\/p>\n\n\n\n<p>Patients with a torn ACL are in pain.<\/p>\n\n\n\n<p>Please remember that limping or favoring or babying a leg = pain.<\/p>\n\n\n\n<p>Pets are not crazy! Holding the affected leg up or limping hurts less than putting full weight on the leg.<\/p>\n\n\n\n<p>When the tear becomes older, pain might subside to some degree, but it stills hurts.<\/p>\n\n\n\n<p>Another reason patients are limping is because the knee is unstable or wobbly.<\/p>\n\n\n\n<p>2. Arthritis<\/p>\n\n\n\n<p>We routinely notice during surgery that patients with long-standing (chronic) ACL tears have more arthritis than patients with a recent injury. This, in turn, leads to pain.<\/p>\n\n\n\n<p>Patients with partial tears typically have less arthritis than patients with complete tears. Recent tears also regularly lead to less arthritis than older (chronic) tears.<\/p>\n\n\n\n<p>Therefore, the sooner we perform the surgery, the better for the patient.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"640\" src=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/DJD-2yF-Pitbull.jpg\" alt=\"Multiple bone spurs (green arrow) and destroyed cartilage (blue arrow)\" class=\"wp-image-1776\"\/><figcaption>Multiple bone spurs (green arrow) and destroyed cartilage (blue arrow)<\/figcaption><\/figure><\/div>\n\n\n\n<p>3. Scar tissue<\/p>\n\n\n\n<p>Scar tissue is what we rely on after conservative treatment for an ACL tear. Experience proves that scar tissue alone is not enough to provide good function, at least in medium- and large-breed dogs.<\/p>\n\n\n\n<p>Scar tissue is manifested by what we call the \u201cmedial buttress,\u201d which can be a very prominent bulge inside a pet\u2019s knee.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1500\" height=\"2000\" src=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Medial-buttress-1500x2000.jpg\" alt=\"Medial Buttress\" class=\"wp-image-1777\" srcset=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Medial-buttress-1500x2000.jpg 1500w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Medial-buttress-825x1100.jpg 825w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Medial-buttress-768x1024.jpg 768w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Medial-buttress-1152x1536.jpg 1152w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Medial-buttress-1536x2048.jpg 1536w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Medial-buttress-scaled.jpg 1920w\" sizes=\"auto, (max-width: 1500px) 100vw, 1500px\" \/><figcaption>Medial Buttress<\/figcaption><\/figure><\/div>\n\n\n\n<p>In turn, scar tissue leads to our next point.<\/p>\n\n\n\n<p>4. Decreased range of motion<\/p>\n\n\n\n<p>A long-term consequence of arthritis and scar tissue is a decreased range of motion of the knee.<\/p>\n\n\n\n<p>Patients with older (chronic) ACL tears commonly experience a decreased range of motion. This might not matter much to a couch potato, but it will affect the performance of an active family pet or a working dog.<\/p>\n\n\n\n<p>5. Muscle atrophy<\/p>\n\n\n\n<p>Patients who favor a hind leg classically show various degrees of muscle atrophy because of poor use of the leg.<\/p>\n\n\n\n<p>This can be assessed easily by measuring the circumference of the thigh with a simple tape measure.<\/p>\n\n\n\n<p>6. Exercise intolerance<\/p>\n\n\n\n<p>Obviously, a family pet or working dog will have a tough time running around with a sore knee.<\/p>\n\n\n\n<p>Dogs with a torn ACL are reluctant to play or go for walks. Exercise intolerance or poor athletic performance classically leads to weight gain, because these pets often receive the same amount of food (and sometimes more, along with more treats).<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1280\" src=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Bulldog-Pixabay.jpg\" alt=\"A dog laying down\" class=\"wp-image-1779\" srcset=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Bulldog-Pixabay.jpg 1920w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Bulldog-Pixabay-1100x733.jpg 1100w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Bulldog-Pixabay-768x512.jpg 768w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Bulldog-Pixabay-1536x1024.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure><\/div>\n\n\n\n<p>7. Weight gain<\/p>\n\n\n\n<p>A consequence of many of the above changes is decreased activity, which invariably causes weight gain.<\/p>\n\n\n\n<p>This is a common observation in ACL patients. Unless you decrease your pet\u2019s food intake to match the decrease in activity, weight gain is inevitable.<\/p>\n\n\n\n<p>8. Opposite ACL tear<\/p>\n\n\n\n<p>Arguably, weight shifting may lead to a tear of the opposite ACL. While this might be manageable in a yorkie or a cocker, it becomes a much bigger problem with a Labrador or a mastiff. Helping a 100 lb dog who has both ACLs torn at the same time is not easy!<\/p>\n\n\n\n<p>9. Tear of the meniscus<\/p>\n\n\n\n<p>Instability in the knee can lead to a tear of the meniscus (see picture below), which is a pad of cartilage in the knee. This can cause even more pain.<\/p>\n\n\n\n<p>On the opposite, once the knee is stabilized, the risk of a tear of the meniscus is minimized.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1304\" src=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Meniscus-2000x1304.jpg\" alt=\"Removed muscle\" class=\"wp-image-1780\" srcset=\"https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Meniscus-2000x1304.jpg 2000w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Meniscus-1100x717.jpg 1100w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Meniscus-768x501.jpg 768w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Meniscus-1536x1002.jpg 1536w, https:\/\/www.drphilzeltzman.com\/blog\/wp-content\/uploads\/2021\/06\/Meniscus-2048x1336.jpg 2048w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/><\/figure><\/div>\n\n\n\n<p>10. Distant problems<\/p>\n\n\n\n<p>The changes in gait and posture can affect all three other legs, as well as the spine. Weight shifting may cause or exacerbate an orthopedic problem in another leg.<\/p>\n\n\n\n<p>A doggie physical therapist told me once: \u201cAn ACL rupture is the beginning of a cascade of events in other body parts &#8211; joints, muscles &#8211; that we can\u2019t forget.\u201d<\/p>\n\n\n\n<p>To a degree, some of the above changes can be used to \u201cdate\u201d an ACL tear. From experience:<\/p>\n\n\n\n<p>. A patient with a recent ACL tear classically is lame and painful.<\/p>\n\n\n\n<p>A patient with an old (chronic) ACL tear typically presents with limping, pain, arthritis, decreased range of motion, muscle atrophy and weight gain. In surgery, we certainly see much more bone spurs in a dog with a chronic tear than with a recent tear.<\/p>\n\n\n\n<p>From a surgeon\u2019s standpoint, an ACL tear is a very fixable problem.<\/p>\n\n\n\n<p>Sure, it is possible to live with a torn ACL. Certainly, it might be the only option if you absolutely cannot afford surgery.<\/p>\n\n\n\n<p>ACL surgery has changed dramatically over the past few years. I now expect a return of at least 95 % of normal function in at least 95 % of my patients of any size after ACL surgery, of any type.<\/p>\n\n\n\n<p>So it\u2019s hard for me to believe that affected dogs, especially large ones, have (and will have) a good quality of life with an untreated ACL tear.<\/p>\n\n\n\n<p>Phil Zeltzman, DVM, DACVS, CVJ, Fear Free Certified<\/p>\n\n\n\n<p><a href=\"https:\/\/www.DrPhilZeltzman.com\">www.DrPhilZeltzman.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pet owners sometimes ask what would happen if we didn\u2019t address a torn anterior cruciate ligament (ACL). Dr. Google and random people will suggest conservative treatment as a perfectly valid option. A non-surgeon colleague even wrote elsewhere that since people often don\u2019t need surgery for an ACL tear, then we shouldn\u2019t need it in dogs. [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[228,247,157,253,129,10],"class_list":["post-1775","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-acl-tears","tag-arthritis","tag-phil-zeltzman","tag-torn-acl","tag-tplo","tag-veterinary-surgery"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>10 deadly sins of untreated ACL tears | Dr Phil Zeltzman\u2019s Blog<\/title>\n<meta name=\"description\" content=\"Pet owners sometimes ask what would happen if we didn\u2019t address a torn anterior cruciate ligament (ACL). 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