Product No. 70103

Knee Aspiration & Injection Trainer with Ultrasound Capabilities

Skin Tone:

An anatomically accurate adult knee model for injection and aspiration of synovial fluid from the knee joint, from both the lateral and medial aspects, using palpation or ultrasound-guidance.

The robust sealed knee includes knee joint, patella, patellar tendon and the suprapatellar space. 

Key anatomical landmarks are realistic to palpate, enabling injection and aspiration to be practised, and accuracy improved. Discrete muscle, skin and fat layers, provide realistic tissue and needle response. 

Performing knee aspirations and injections are fundamental skills required for Core Medical Trainees, as well as Rheumatologists, Doctors practising General Medicine and Orthopaedic Surgeons*

The model was evaluated by Charles Wakeley (Bristol Royal Infirmary) and Andrew Grainger (Leeds Teaching Hospitals, UK).

*Specialty Training Curriculum for Core Medical Training, Joint Royal Colleges of Physicians Training Board, 2009, amended 2013

*Section 5 Practical Procedures, Specialty Training Curriculum for Rheumatology, Joint Royal Colleges of Physicians Training Board, 2010

*Section: Applied Clinical Skills: General, Page 55, Specialist Training in Trauma & Orthopaedics Curriculum, 2013



  • 1,000+ stabs per module with 21 gauge needle
  • Precise, palpable anatomy with bony landmarks
  • Robust, sealed knee unit that holds all anatomy
  • Key internal landmarks visible under ultrasound
  • Compatible with all standard ultrasound machines
  • Echolucent material allows aspiration and injection under ultrasound-guidance or using the palpation method
  • Suitable for Undergraduate and Postgraduate medical study
  • Knee skin is watertight


  • Discrete muscle and skin layers provide realistic tissue and needle response
  • Anatomically accurate synovial sac and palpable patella
  • Realistic color and consistency of synovial fluid


  • Can be used with leg supports for supine position, or without leg supports for side of bed position
  • Caters for ultrasound-guided techniques as well as palpation
  • Separate Fluid Bag & Stand ensure the model is easy to use and mobile
  • Clear indicator on Fluid Bag to prevent overfilling


  • Skin washable using mild soap and water


  • Latex free


The following key anatomical landmarks are realistic to palpate:

  • Skin
  • Subcutaneous fat, quadriceps tendon & patellar ligament
  • Prefemoral fat pad
  • Suprapatellar fat pad
  • Hoffa (Infrapatellar) fat pad
  • Femur
  • Medial & lateral collateral ligament
  • Tibia
  • Patella
  • Joint space & synovial recess
  • Meniscus 
  • Muscle mass of quadriceps 

Skills Gained

  • Injection into joint cavity
  • Aspiration of synovial fluid from both the lateral and medial aspects
  • Identification of anatomical landmarks using the palpation method or ultrasonic guidance
  • Patient positioning and management
  • Recognition of joint effusion
  • Ballottement
  • Competence using ultrasound technology to perform systematic scanning techniques and examination of the knee joint
  • Product Image

    Fluid Bag and Stand

    Product No. 70106

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  • Product Image

    Synovial Fluid (including syringe)

    Product No. 70107

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  • Product Image

    Needle Set

    Product No. 70108

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  • Product Image

    Ultrasound Knee Module for Aspiration & Injection

    Product No. 70104

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  • Leg unit, including removable supports

    Leg unit, including removable supports

  • Carry case

    Carry case