Waterproof Casting For Arm Fractures

What are Waterproof Casts For Arm Fractures

Waterproof casts are specialised orthopaedic devices designed to immobilise and protect the injured area, facilitating proper alignment and healing of fractured bones in the arm.

Unlike traditional casts made of materials like plaster of Paris, waterproof casts use a dual-layer structure. The inner layer, in direct contact with the skin, is crafted from a non-absorbent material, while the outer shell is typically composed of fibreglass. This design permits water exposure without compromising the cast’s integrity or leading to discomfort in the patient’s arm.

Indications for a Waterproof Cast

Waterproof casts for arm fractures may be considered in the following cases:

• Non-Displaced Fractures
  They are ideal for non-displaced fractures in the arm where the bone pieces remain aligned. In these cases, the waterproof cast provides sufficient immobilisation while allowing some degree of moisture exposure without risk.
• Post-Surgical Recovery
  After certain arm surgeries, particularly those involving bone realignment or fixation, a waterproof cast can be used. This allows the patient to maintain hygiene more easily during the recovery period.
• Active Lifestyle Considerations
  For patients who lead active lifestyles or are engaged in water-related activities, waterproof casts for arm fractures offer a practical solution. They enable participation in daily activities without the worry of cast damage due to moisture.
• Pediatric Patients
  Children, who may find it challenging to keep a traditional cast dry, can benefit from a waterproof cast. This option reduces the risk of cast deterioration due to accidental water exposure.
• Preference for Improved Hygiene
  Patients who prioritise maintaining a higher level of hygiene during the healing process may opt for a waterproof cast. This type of cast allows for regular washing of the arm, reducing the risk of odour and skin irritation.

Applying the Waterproof Cast

The process of applying a waterproof cast for an arm fracture typically involves the following steps:

1. Padding with Aquacast Liner: Initially, the area around the fracture is padded with an aquacast liner. This liner is used for comfort and serves as a protective layer between the skin and the cast.
2. Application of Fibreglass Material: The fibreglass material, forming the outer shell of the cast, is soaked in water. Once dampened, it becomes soft and moldable.
3. Wrapping the Affected Region: The arm specialist wraps the fibreglass material around the arm, ensuring it covers the fractured area while allowing for necessary movement at joints like the elbow or wrist, depending on the fracture location.
4. Moulding and Setting the Cast: The fibreglass is then moulded into the correct position to effectively immobilise the arm. It is left to set until it hardens, forming a rigid protective layer over the fracture.
5. Final Adjustments and Checking Fit: Once the cast has been set, final adjustments are made to ensure a proper fit. This includes checking that the cast is not too tight or loose and does not restrict blood flow.

Benefits of a Waterproof Cast

The use of a waterproof cast for an arm fracture offers several benefits:

• Water Resistance
  A feature of the waterproof cast is its water-resistant design, allowing patients to bathe, shower, and even swim without damaging the cast or compromising the healing process.
• Reduced Risk of Skin Problems
  Since the cast allows water to pass through and permits the skin to dry quickly, there is a lower risk of skin problems such as irritation, rashes, or infections.
• Improved Hygiene and Comfort
  Waterproof casts contribute to arm hygiene and overall comfort for the patient. The ability to wash the arm reduces the build-up of sweat and odour.
• Durability and Strength
  These casts are designed for strength and durability, making them suitable for active patients and children who might otherwise damage a regular cast.
• Ease of Removal
  The removal process of a waterproof cast is simple. It often does not require a cast saw and is unclipped, which can be less intimidating for patients.

Risks and Complications

While waterproof casts for arm fractures are generally safe, certain risks and complications may arise.

• Pressure Sores or Ulcers: The most common complication is the development of pressure sores or ulcers due to the cast, particularly if it is too tight or worn for an extended period.
• Thermal Burns: There is a risk of thermal burns during the application process of the cast.
• Cuts from Cast Application: The process of applying the cast might cause cuts or abrasions, especially if not done with care.
• Joint Stiffness: Prolonged immobilisation of the arm can lead to stiffness in the joints enclosed by the cast.
• Allergic Reactions: Some patients might experience allergic reactions to the materials used in the waterproof liner.
• Ineffectiveness in Certain Conditions: Waterproof casts are not recommended for fractures with open skin wounds due to the increased risk of infection.