Knee Ligament and Meniscal Injuries

• Use culturally safe, trauma- and violence-informed care. Explain why questions matter, seek permission before sensitive topics, and adapt communication to the patient’s language, identity, culture, disability and previous health care experiences (Public Health Agency of Canada, 2018).
• Patient and contextual information: age; sex and gender when clinically relevant; skeletal maturity when known; preferred language and communication needs; work or school; caregiving; sport or physical activity; and the activities, roles and cultural or community connections important to the patient.

Primary concerns

• Injury mechanism and early course: date and setting; contact or non-contact injury; twisting, pivoting, cutting, landing, rapid deceleration, valgus or varus force, hyperextension, direct blow or high-energy trauma; a pop or shift; immediate pain; timing and amount of swelling; ability to continue activity and bear weight; deformity; reduction on the field; first aid; and care already received.
• Current symptoms and course: location and severity of pain; swelling or recurrent effusion; stiffness; loss of extension or flexion; true blocking of movement versus pain-limited motion; catching, clicking or locking; giving way or instability; weakness; numbness or tingling; sleep; and whether symptoms are improving, stable, fluctuating or worsening.
• Aggravating and easing factors: walking, stairs, kneeling, squatting, pivoting, cutting, running, jumping, landing, prolonged sitting or standing, work or sport tasks, rest, movement, bracing, medication and other self-management.
• Medical, imaging and surgical information: emergency, primary care, sport medicine or orthopaedic assessment; current diagnosis and uncertainty; radiograph or MRI findings; aspiration; operative report; injured or reconstructed structures; meniscal repair, meniscectomy or other procedure; graft or fixation when relevant; weight-bearing and range restrictions; brace plan; wound plan; medication; and follow-up dates.
• Previous knee and lower-limb history: prior ligament, meniscal, patellar, cartilage or bone injury; surgery; giving way; previous rehabilitation and return to activity; knee osteoarthritis; and hip, ankle, foot, neurological or balance concerns that may change assessment or care.
• Body systems review: constitutional symptoms; skin and wound; cardiovascular and vascular; respiratory; neurological; musculoskeletal and bone health; gastrointestinal and genitourinary; endocrine or metabolic; immune or infectious; haematologic or bleeding; sleep; and mood symptoms that may change safety, healing, the differential diagnosis or referral.
• Health and safety context: recent surgery, hospitalization, immobilization or travel; venous thromboembolism history or risk; infection; diabetes; inflammatory disease; osteoporosis; bleeding risk; other injuries; pregnancy when relevant; and current medications and supplements, including analgesics, anti-inflammatory drugs, anticoagulants and corticosteroids.
• Functioning and participation: effects on mobility, self-care, household tasks, work or school, caregiving, driving, sleep, recreation, sport, community roles, confidence in the knee and desired level of activity.
• Social and access context: work or school demands and support, caregiving, finances or compensation, housing, transportation, safety, discrimination, social support, access to care and suitable rehabilitation space or equipment (Public Health Agency of Canada, 2026).
• Previous care and responses: education, protection, brace or crutches, medication, exercise, hands-on care or other approaches tried; benefits, adverse effects and reasons care was difficult to use or continue.
• Patient perspective: understanding of the injury and imaging, concerns about damage, surgery or reinjury, confidence, expectations, priorities, goals, preferences, cultural approaches and what meaningful recovery would look like.
• Flag review: check Red Flags and refer to the separate fixed Orange Flags and Yellow Flags modules when relevant. Reassess when the knee or general health changes.

Outcome measures

• Choose a small set that reflects the patient’s goals and can be repeated. Record the surgical phase, brace or gait aid, testing conditions and any restriction so results can be compared.
• Patient-specific functioning: Patient-Specific Functional Scale (PSFS).
• Disability and participation: WHO Disability Assessment Schedule 2.0 (WHODAS 2.0).
• Quality of life: WHOQOL-BREF or another suitable validated measure.
• Knee symptoms and activity: the International Knee Documentation Committee (IKDC) Subjective Knee Form can be used across ligament and meniscal presentations. The Pedi-IKDC is available for patients aged 10 to 18 years.
• Physical performance: repeatable measures of knee motion, effusion, strength, balance, gait and task-specific performance selected for the patient’s stage, goals and safety.
• Individual goals: agree on patient-defined goals and how progress will be recognized. SMART wording may be used.

Orange Flags are signs that a mental health or substance use concern may require emergency or timely assessment or shared care, and may change whether and how MSK care proceeds. They are not diagnoses. Ask directly and respectfully when concern arises, considering immediate safety, severity, change from usual, daily functioning and context. Psychosocial factors that may affect recovery but do not require separate mental health or medical assessment are addressed under Yellow Flags.

ACTION: Arrange emergency assessment now when there is immediate danger or an urgent medical need:

• Suicide, self-harm or harm to others: current intent or plan, a recent attempt, inability to stay safe, or behaviour suggesting an immediate risk of serious harm.
• Severe change in mental state: extreme agitation, confusion, disorganization, possible psychosis or mania with impaired judgment or unsafe behaviour, or inability to meet basic needs when this creates immediate danger.
• Substance-related or medical emergency: suspected overdose, severe intoxication, dangerous withdrawal, delirium or another sudden change requiring urgent medical care.

When immediate safety is uncertain, do not leave the person alone while help is arranged. Follow local emergency procedures and call 9-1-1 for immediate danger or urgent medical need. If the person is thinking about suicide, call or text 9-8-8: Suicide Crisis Helpline with them or support them to do so.

If violence, abuse or exploitation is disclosed or suspected, support immediate safety and follow applicable safety and reporting requirements.

ACTION: Arrange prompt medical or mental health assessment when there is:

• Suicide or self-harm thoughts: thoughts without immediate danger.
• Substantial symptoms or effects: severe, persistent or worsening symptoms of depression, anxiety, trauma, possible psychosis or mania, eating problems or substance use that substantially affect daily life, decision-making or safe participation in care.
• Other reasons for assessment: a marked change from usual behaviour or functioning; concern about medication or substance effects; a presentation outside the clinician’s competence; or a request for help.

Agree with the patient on who will be contacted, how soon and what to do if the situation worsens. Confirm that the person has connected with the service when clinically important.

ACTION: Adapt and coordinate MSK care:

• Safe care: care may continue when it is safe and acceptable and does not delay needed assessment. Adapt communication, examination and care; obtain ongoing consent; and coordinate with other providers with the patient’s permission.
• Continue the MSK assessment: do not assume that a mental health or substance use concern explains the MSK presentation. Continue to consider physical causes and the patient’s account.
• Questionnaires: they may support conversation and monitoring, but do not establish a diagnosis or replace direct questions, clinical judgment or action.
• Acceptable support: ask what type of help is acceptable and whether language, cultural, family, community or other supports are important to the patient.

ACTION: Document and follow up:

Record the concern; relevant questions and the patient’s responses; the safety decision and reasons; actions, advice and referrals; communication and consent; follow-up; and any unresolved concern. Follow applicable privacy, safety and reporting requirements.

For provincial, territorial and national services, see Mental health support: Get help (Public Health Agency of Canada 2026).

Yellow Flags are personal, social, work, school, healthcare, environmental or structural factors that may influence symptoms, functioning, participation or response to care. They are contextual, not diagnoses or certain predictions, and do not mean that symptoms are psychological. They guide how care is tailored and do not by themselves require urgent referral. Explore them through conversation and ongoing outcome review, with attention to the patient’s priorities, strengths and circumstances. A separate Yellow Flag score is not required. New or worsening signs of serious physical illness follow the Red Flag process. Mental health or substance use concerns that need separate assessment, or any immediate safety concern, follow the Orange Flag process and applicable emergency or safeguarding procedures.

Explore relevant factors:

• Understanding, expectations and healthcare experiences: concerns about injury or damage, uncertainty, recovery expectations, confidence, conflicting advice, previous dismissal or harm, and trust in care.
• Responses to symptoms and activity: worry, fear, avoidance, cycles of doing too much and then needing prolonged rest, difficulty pacing, coping, sleep, confidence in self-management, and return to meaningful activities.
• Emotional and life context: distress, low mood, anxiety, grief, trauma, caregiving, relationship change, job loss or other major events. Ask permission before sensitive questions and limit discussion to what is relevant and acceptable to the patient.
• Relationships, culture and strengths: supportive relationships, isolation, family and community roles, cultural or spiritual practices, identity, preferences, language and other sources of resilience.
• Work, school and administrative context: physical and psychosocial demands, control, satisfaction, job security, accommodations, return concerns, and compensation, insurance or legal processes. Explore these neutrally and in context.
• Social and structural conditions: consider social and structural determinants of health (Public Health Agency of Canada 2026), including income, housing, food security, transportation, childcare, access and cost of care, discrimination, racism, colonialism, neighbourhood and workplace conditions, and physical or digital accessibility.

ACTION: Respond with the patient:

• Ask, do not assume: use open questions to understand what helps, what gets in the way, what matters and what feels feasible. Ask about strengths and protective factors, not only difficulties. Do not treat a person’s circumstances, culture or choices as a deficit.
• Plan together: integrate relevant findings into shared goals, education, self-management, physical activity or exercise, and participation in meaningful activities. Adapt communication, setting, pace, cost and access where possible.
• Connect and coordinate: with the patient’s consent, consider appropriate clinical, social, workplace, school, community, Indigenous or culturally specific supports. Clarify who will do what and follow up when the connection is important to the plan.
• Review response to care: reassess the patient’s account and the pathway’s selected outcomes at clinically relevant points. If progress differs from expected, review the clinical impression, care plan, access and other barriers; do not automatically attribute the outcome to Yellow Flags.
• Document: record relevant factors and strengths, the patient’s priorities and preferences, agreed actions, consent, referrals or coordination, follow-up, and any change requiring the Orange Flag process.

Select examination elements that answer a clinical question or may change safety, the working diagnosis, care or referral. Adapt timing, positioning, pace and loading to injury stage, swelling, pain, comfort, consent, surgical restrictions and abilities.

• Ongoing consent and comfort: explain each step, provide choices, ask permission before touch or exposure, and stop or modify the examination when requested.
• Immediate safety and weight bearing: inspect alignment, skin, wounds and surgical sites; check weight-bearing tolerance; and assess colour, temperature, pulses, capillary refill, sensation and motor findings when trauma, dislocation, multiligament injury or neurovascular concern is present.
• Observation, gait and effusion: compare sides for swelling, bruising, deformity, muscle bulk, posture, guarding, gait, brace or gait-aid use and ability to transfer, stand and walk. Record effusion with a repeatable method when it will guide progression.
• Movement and range of motion: assess active and passive knee extension and flexion as tolerated, including whether a loss of motion is fixed, pain-limited or related to swelling. Add hip, ankle or patellar movement when it may change the assessment.
• Palpation: examine relevant bone, joint lines, collateral ligaments, extensor mechanism, hamstring and calf structures and surgical sites. Local tenderness shapes the differential but does not define the injured tissue or severity by itself.
• Neurological and vascular examination: assess distal pulses, capillary refill, skin temperature and colour, common fibular and tibial nerve motor and sensory findings, and other lower-limb findings guided by the mechanism and symptoms.
• Ligament examination: use Lachman, anterior drawer, pivot-shift, posterior drawer, posterior sag, valgus and varus stress or rotational tests when pain, swelling and guarding allow meaningful interpretation. Match each test to the ligament and position being assessed, compare sides and interpret a cluster rather than one result (Logerstedt et al., 2017; American Academy of Orthopaedic Surgeons, 2022).
• Meniscal examination: joint-line tenderness, McMurray and Thessaly findings can be combined with the mechanism, effusion, motion and mechanical symptoms. No single test confirms or excludes a tear, and a painful test does not establish that a tear is the main source of symptoms (American Academy of Orthopaedic Surgeons, 2024).
• Strength and motor control: assess quadriceps activation, knee extensor and flexor strength, hip and calf strength, balance and lower-limb control as tolerated. Record pain, compensation, confidence and any surgical restriction.
• Functional performance: progress from sit-to-stand, stairs and single-leg control to running, hopping, jumping, landing, change of direction and work or sport tasks only when safe and relevant. Compare quality, capacity, symptoms and confidence, not symmetry alone.
• Regional and differential examination: examine the hip, patellofemoral joint, ankle, foot, lumbar or neurological system, or another region when the history or initial findings indicate.
• Imaging: radiographs are used after acute trauma when focal tenderness, effusion, inability to bear weight or another fracture concern is present. MRI can clarify internal derangement when the result is likely to change medical, surgical or rehabilitation decisions. Imaging is interpreted with the clinical picture because meniscal and degenerative findings may not explain the symptoms (American College of Radiology, 2020; American Academy of Orthopaedic Surgeons, 2024).
• Reassessment: repeat the findings and tasks needed to track recovery, review the clinical impression, detect adverse effects and decide whether further assessment, imaging or referral is appropriate.

Working clinical presentations

Use these as working clinical descriptions rather than definitive tissue diagnoses. They can overlap or change as pain, swelling, stability and activity evolve.

• Recent knee ligament injury: a contact or non-contact mechanism with pain, effusion, motion loss, tenderness, altered laxity, reduced weight-bearing tolerance or a sense of instability. Name the suspected ligament only when the mechanism and examination support it, and use Red Flags for major or multiligament trauma.
• Meniscal injury without a fixed locked knee: joint-line symptoms after twisting, loaded flexion or gradual onset, with intermittent catching, clicking, effusion or pain during squatting and rotation. A clinical cluster can raise or lower suspicion but does not establish tear pattern or symptom source.
• Combined ligament, meniscal or cartilage injury: the mechanism, effusion, instability, mechanical symptoms, examination or imaging suggests more than one structure is involved. A suspected multiligament injury requires early specialist coordination because protection, treatment and rehabilitation depend on the injured structures and neurovascular status (Murray et al., 2024).
• Persistent or recurrent instability: repeated giving way, apprehension or reduced confidence with pivoting, uneven ground, work or sport after an earlier ligament injury, with modifiable deficits in strength, power, balance or movement control.
• Degenerative meniscal presentation: gradual knee pain and intermittent mechanical symptoms without a clear acute injury, often with coexisting osteoarthritis features. Follow the Knee Osteoarthritis pathway when osteoarthritis is the dominant presentation, and do not assume that an imaging tear is the main pain source.
• Postoperative rehabilitation: recovery after ACL or PCL reconstruction, collateral or multiligament repair or reconstruction, meniscal repair, partial meniscectomy or combined surgery under a documented procedure-specific plan. The structures treated, associated injuries, tissue-healing restrictions and milestones shape progression; protocols are not interchangeable (Gao et al., 2025; Kotsifaki et al., 2023; Murray et al., 2024; Pujol et al., 2025).
• Alternative or overlapping presentation: findings may point to fracture, patellar instability, extensor mechanism injury, tendon disorder, osteochondral injury, infection, inflammatory arthritis, venous thromboembolism, nerve involvement, referred pain or another condition. Use Red Flags and shared care when needed.

Develop care with the patient. Base choices on safety, the working presentation, goals, preferences, culture, age and skeletal maturity, other health conditions, activity demands, access, medical or surgical guidance and response. Use adaptable options rather than a fixed sequence. The cited intervention evidence is presentation-specific: ACL evidence does not automatically apply to PCL, collateral or multiligament injuries, and evidence for isolated acute meniscal injury does not automatically apply to degenerative or combined tears (American Academy of Orthopaedic Surgeons, 2024; Gao et al., 2025; Murray et al., 2024; Svantesson et al., 2024).

Surgical plan and shared decisions

• Procedure-specific plan: obtain and follow the operative and discharge information, including repaired or reconstructed structures, weight bearing, brace use, range limits, wound care, medication and surgical follow-up. ACL or PCL reconstruction, collateral or multiligament repair or reconstruction, meniscal repair, partial meniscectomy and combined procedures have different healing constraints (Gao et al., 2025; Kotsifaki et al., 2023; Murray et al., 2024; Pujol et al., 2025).
• ACL or meniscal injury – nonoperative or operative care: discussion with sport medicine or orthopaedics can reflect instability, a displaced or repairable tear, associated injury, skeletal maturity, work and sport demands, previous response and the patient’s priorities. Active rehabilitation can be used with either pathway (American Academy of Orthopaedic Surgeons, 2022; American Academy of Orthopaedic Surgeons, 2024; Prill et al., 2025).
• Planned ACL reconstruction – preparation for surgery: reducing effusion, restoring comfortable knee extension and flexion, improving quadriceps activation and strength, practising gait and preparing for postoperative equipment and support (Culvenor et al., 2022; ESSKA, AOSSM and AASPT, 2026; Kotsifaki et al., 2023).

Education, self-management and participation

• Understanding the presentation: explain the working diagnosis, important uncertainty, the role and limits of examination and imaging, the expected variable course and the reasons for protection, referral or reassessment. Address concerns about damage or reinjury without minimizing the injury.
• Daily activity and participation: temporary pacing, task modification, work or school accommodations, driving advice, footwear or equipment changes and planning for caregiving or transport can support participation while the knee recovers.

Protection and optimal loading

• ACL injury or reconstruction – protection and loading: weight bearing, knee motion and daily activity can progress within symptom response and documented restrictions. A gait aid or brace can be linked to a specific indication, associated injury or procedure (ESSKA, AOSSM and AASPT, 2026; Logerstedt et al., 2017; Kotsifaki et al., 2023).
• Isolated medial collateral ligament injury – loading and exercise: weight bearing as tolerated and progressive strengthening within stability and symptom response; brace use and duration are individualized (Svantesson et al., 2024).
• PCL, lateral collateral, posterolateral or multiligament injury – protection and exercise: a presentation- or procedure-specific plan for bracing, weight bearing, knee motion and muscle loading, coordinated with sport medicine or orthopaedics (Gao et al., 2025; Logerstedt et al., 2017; Murray et al., 2024).
• Meniscal healing constraints: after a meniscal repair or reconstruction, loading and range progression reflect tear pattern, repair stability, associated procedures and the surgeon’s plan. Progression uses both healing time and clinical milestones rather than either one alone (Pujol et al., 2025).

Physical activity and exercise

• ACL or meniscal injury – progressive exercise: options include restoring knee extension and flexion, quadriceps activation, progressive knee extensor and flexor strength, hip and calf strength, aerobic conditioning, balance, neuromuscular control and practice of meaningful daily, work or sport tasks. Type, range, load, speed and complexity reflect the injury, stage, symptoms, goals and response (ESSKA, AOSSM and AASPT, 2026; Kotsifaki et al., 2023; Prill et al., 2025; Pujol et al., 2025).
• After ACL reconstruction or meniscal repair – quadriceps activation: neuromuscular electrical stimulation can accompany active exercise early when quadriceps activation is limited. Skin, sensation, circulation, wound and device precautions apply (Kotsifaki et al., 2023; Pujol et al., 2025).
• After ACL injury – injury-reduction training: a structured programme that includes strength, balance, landing, cutting and movement-control practice can form part of ongoing preparation for athletes returning to higher-risk pivoting sports (American Academy of Orthopaedic Surgeons, 2022; ESSKA, AOSSM and AASPT, 2026).

Return to work, activity and sport

• ACL or meniscal injury – return to activity or sport: review pain, effusion, knee motion, stability, strength and power, movement quality, conditioning, confidence or psychological readiness, task-specific performance and the response to progressive exposure. Time from injury or surgery and healing constraints remain part of the decision (Kotsifaki et al., 2023; Meredith et al., 2020; Prill et al., 2025).
• Ligament or meniscal injury – graded exposure: progress from controlled practice to higher speed, load, fatigue, unpredictability, contact and full work or sport participation within presentation- or procedure-specific healing constraints. Coordinate with the surgeon, sport medicine clinician, rehabilitation team, coach or workplace when the decision extends beyond one clinician’s role (Gao et al., 2025; Kotsifaki et al., 2023; Murray et al., 2024; Prill et al., 2025; Svantesson et al., 2024).

Hands-on and symptom-relieving care

• Knee ligament or meniscal injury – hands-on care: gentle patellar or knee mobilization and soft-tissue techniques can accompany active care for short-term motion or gait goals. Respect healing tissues and surgical restrictions, and stop if swelling, pain or motion worsens (Logerstedt et al., 2017; Prill et al., 2025; Pujol et al., 2025).
• After ACL reconstruction or meniscal surgery – symptom relief: cold, compression, elevation or comfortable positioning can be used for short-term pain or swelling relief. Protect skin and circulation and connect symptom relief to progressive movement and activity (Kotsifaki et al., 2023; Pujol et al., 2025).
• Culturally grounded approaches: traditional, spiritual or community-based approaches identified by the patient can be integrated when safe, acceptable and within scope, with coordination across practitioners when needed.

Psychological, social and interdisciplinary support

• After ACL injury or reconstruction – confidence and readiness: supportive communication, graded exposure and repeated meaningful tasks can address fear of reinjury, low confidence or uncertainty. Persistent distress or mental health needs can be coordinated with an appropriate provider (ESSKA, AOSSM and AASPT, 2026; Kotsifaki et al., 2023; Meredith et al., 2020).
• Interdisciplinary care: sport medicine, orthopaedics, primary care, physiotherapy, chiropractic care, athletic therapy, occupational therapy, pharmacy, psychology, nursing, coaches, schools and workplaces can contribute according to the injury, surgery, health needs and participation goals.
• Access and feasibility: transportation, cost, housing, language, technology, work or school demands, caregiving, equipment and service availability can shape the plan. Select options the patient can use and revisit barriers when participation is difficult.

Medication

• Medication coordination: medication choices can be coordinated with an authorized prescriber or pharmacist. Review current use, intended benefit, contraindications, interactions and adverse effects, especially after surgery or when anticoagulants are used, and keep medication decisions connected to functioning and the overall plan.

Monitoring and reassessment

• Agree on a reassessment point based on injury or surgical phase, symptom course, safety, goals, the options being tried, patient needs and access rather than a fixed visit schedule.
• Repeat the small outcome set recorded at baseline and review pain, effusion, knee motion, stability, strength, gait, task performance, functioning, participation, confidence, benefits, adverse effects, treatment burden and progress toward patient-defined goals.
• Continue what is useful and acceptable; adapt or stop what is not; and revisit the working presentation, restrictions, differential diagnosis, imaging, referral or shared care when progress differs from expectations or new safety concerns emerge.

• Expected course: recovery varies with the ligament or meniscal injury, knee stability, associated damage, treatment and desired activity. Some isolated MCL injuries and selected isolated lower-grade PCL injuries recover with nonoperative care, while ACL or PCL reconstruction, meniscal repair and multiligament injury usually involve rehabilitation over months. Return to the previous activity level is not guaranteed, and no universal timeline applies (American Academy of Orthopaedic Surgeons, 2022; Gao et al., 2025; Kotsifaki et al., 2023; Murray et al., 2024; Pujol et al., 2025; Svantesson et al., 2024).
• Factors associated with a less favourable course: combined ligament, meniscal or cartilage injury, recurrent giving way or reinjury, persistent effusion or extension loss, substantial strength or movement deficits, lower confidence or readiness, other health conditions and barriers to rehabilitation may be associated with slower or incomplete recovery. These are group-level considerations, not certain individual predictions (Culvenor et al., 2022; Kotsifaki et al., 2023; Murray et al., 2024; Prill et al., 2025).
• Potential supports for recovery: clear diagnosis and restrictions, timely specialist input when needed, protection of healing tissue, restoration of comfortable extension and flexion, progressive strength and neuromuscular training, criteria-based activity exposure, confidence, feasible accommodations and coordinated care may support recovery and reduce reinjury risk (Gao et al., 2025; Logerstedt et al., 2017; Murray et al., 2024; Pujol et al., 2025; Svantesson et al., 2024).
• Discussing prognosis: describe uncertainty in plain language, ask what the patient wants to know, and update the outlook using the injury or surgical plan, patient goals, repeated outcomes, confidence and response over time rather than treating an imaging finding, grade or test threshold as a fixed prediction.