Often, employers believe their job is complete if they can keep their workers safe from an impact injury during a fall event. Unfortunately, according to the Occupational Safety and Health Administration (OSHA), timely rescue and post-fall suspension trauma are often ignored when employers are building a fall protection plan. To the employee waiting for rescue, suspension trauma is a real and very serious threat. Greater knowledge of what suspension trauma is and how it affects the body is needed to develop a plan to control the hazards it presents.
What Is Suspension Trauma?
Suspension trauma, also referred to as orthostatic intolerance, is a natural human reaction to being upright and immobile and can be caused by a situation when a person is forced to stay upright without standing. The use of a personal fall arrest system during a fall event can be the cause of this situation.
During a fall event, several things occur that can lead to suspension trauma. Because the worker is suspended in an upright position with his/her legs hanging, blood begins to accumulate in the legs. This is commonly called venous pooling (the accumulation of too much blood in the veins) which reduces the flow of oxygenated blood to the heart and brain.
Additionally, in a post-fall suspension event, the leg straps on a worker’s safety harness can exert pressure on veins in the legs, compressing them and further reducing blood flow back to the heart.
When venous pooling happens to someone in a standing position, he or she loses consciousness, faints and falls to the ground, resulting in the head (brain), heart and legs on the same level and normalized blood flow. Unfortunately, during a fall event, the harness keeps the worker upright. The worker faints but cannot collapse and circulation isn’t restored.
Under the most ideal circumstances, when a rescue plan is in place, suspension trauma should always be treated as an emergency situation because, according to the Emergency Medicine Journal, it can become fatal in less than 30 minutes.
Suspension Trauma Warning Signs
It is important to know the warning signs associated with suspension trauma. They include faintness, breathlessness, sweating, paleness, hot flashes, increased heart rate, nausea, dizziness, unusually low heart rate, unusually low blood pressure and loss of vision.
Taking Steps to Reduce the Potential for Suspension Trauma
Suspended workers awaiting rescue can take some action to guard against injury. Preventative steps for suspended workers include:
- Adopting a sitting position if possible
- Moving into a horizontal position as much as possible
- Using legs to push off from a hard surface, keeping the muscles active
- Pumping legs frequently to maintain blood flow and prevent venous pooling
One of the primary ways to slow the progression of suspension trauma is to stand up. When standing, the leg muscles must contract to provide support and maintain balance and these actions also put pressure on the veins. This pressure, along with a series of one-way valves in the veins, helps blood get to the heart and reduces the amount of blood pooling in the legs.
How Does a Worker Stand While Hanging in a Harness?
A worker can stand in a harness by employing suspension trauma relief straps. Suspension trauma relief straps typically come packaged in two pouches that attach to each side of a harness. During a fall event, the worker can deploy the trauma relief straps - creating a loop that the worker can put his feet into and press against to simulate standing up.