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Virchow's Triad

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pregnancy CTPA increased breast cancer risk

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pregnancy CTPA increased breast cancer risk

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Can't diagnose PE but can rule out other causes

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VQ scan will have a mismatch if positive for PE

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During a venogram, a liquid called a contrast dye is injected into a vein in your foot. The dye travels up the leg and can be detected by X-ray, which will highlight a gap in the blood vessel where a clot is stopping the flow of blood.

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Education - how to manage or avoid condition ie movement, diet, exercise, smoking etc

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Education - how to manage or avoid condition ie movement, diet, exercise, smoking etc

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u/s Doppler - visualisation of thrombus and flow changes due to obstruction

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u/s Doppler - visualisation of thrombus and flow changes due to obstruction

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reddening of skin

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Effective use of algorithms and d dimer can prevent imaging from being needed. There is no radiation dose from ultrasound, but it does help reduce demand on services

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Effective use of algorithms and d dimer can prevent imaging from being needed. There is no radiation dose from ultrasound, but it does help reduce demand on services

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surgical intervention of suction catheter/wire cage device

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standardised algorithms not as useful for specialised populations: pregnant, elderly

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standardised algorithms not as useful for specialised populations: pregnant, elderly

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No radiation dose

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D- Dimer Tests can be false positive if patient is pregnant

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D- Dimer Tests can be false positive if patient is pregnant

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+High sensitivity, specificity
- Cost, time, Avaialability,
poor diet may = high weight = might not fit
o

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injury or surgery leading to prolonged inactivity

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injury or surgery leading to prolonged inactivity

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MRDTI: Does not require injection/contrast. Diagnostic accuracy is high, interobserver agreement between 2 readers excellent, signal present within hours of thrombus formation

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MRDTI: Does not require injection/contrast. Diagnostic accuracy is high, interobserver agreement between 2 readers excellent, signal present within hours of thrombus formation

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CTPA - contrast injected to highlight vessels of the lungs and show areas where there is a gap in blood supply.

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CTPA - contrast injected to highlight vessels of the lungs and show areas where there is a gap in blood supply.

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Decision rules based on signs and symptoms

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thrombolytic to lyse clot

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sonographer unable to determine compressibility of vein segment is due to new dvt or residual

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VQ Scan for PE

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U/S: sonographer cannot determine if incompressibility of specific vein segment caused by new DVT or residual thrombosis

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U/S: sonographer cannot determine if incompressibility of specific vein segment caused by new DVT or residual thrombosis

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Compression Ultrasound

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D-Dimer Test

     

  A d-dimer test is a blood test that measures a substance that is released when a blood clot breaks up

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D-Dimer Test

     

  A d-dimer test is a blood test that measures a substance that is released when a blood clot breaks up

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Pain, swelling and tenderness in the leg! (calf). Heavy ache in the affected area and warm skin in the area of the clot

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CTPA: High sensitivity and specificity, but risk of contrast induced nephropathy

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CTPA: High sensitivity and specificity, but risk of contrast induced nephropathy

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Symptoms- SOB, painful swelling and demarcated erythema

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Prolonged  immobility such as hospital bed or long flights.

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Pregnancy

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Low specificity for acute VTE

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Hypertension

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Previous Blood Clots
Obesity
Increased Maternal Age

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Vitamin K/anticoagulant treatment

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Preventative or Curative

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Please also add pros and cons of modalities, image appearances etc.

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CLINICAL PRESENTATION (SIGNS AND SYMPTOMS)

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CLINICAL PRESENTATION (SIGNS AND SYMPTOMS)