Here's why:
* Vacuum splints are inflatable and designed for medical use, but they can be considered improvised in a situation where you don't have access to traditional medical splints.
* Pillows, blankets, and cardboard are everyday items often used as makeshift splints in emergencies.
* SAM splints are inflatable splints used for immobilizing injuries, and while they are designed for medical use, they can be improvised in a situation where traditional medical splints are not available.
* Wire ladder splints are made from a simple wire frame, usually used in emergencies when other materials are unavailable.
All these splints are considered improvised because they are not the standard medical splints used by healthcare professionals. They are used in emergency situations when traditional splints are not available.
It's crucial to remember that while improvised splints can be helpful in emergencies, they should only be used until professional medical help arrives.