Pain - the 5th Vital Sign
Monday, May 14th, 2007What is pain? This was the question directed to me by our very first and own pain management expert, Dr Mary Suma Cardosa. I enjoy talking to her. She talks about her field of interest with much passion and commitment. So, what is pain? There I stood dumbfounded, as the last time anybody ask me this was when I was a medical student.
Pain, the word “pain” comes from the Latin: poena meaning punishment, a fine, a penalty. It is a sensation, a feeling of discomfort. But what does it really mean? Actually, pain is a protective mechanism of our body when we are injured in one way or another. In other words, when one feels pain, one has sustained some form of injury. But pondering it for a moment tells us this is not necessarily true in all instance.
I once met a young girl, she had lots of deformity as a result of a genetic fault making her unable to perceive or feel pain. Therefore, she often hurts herself by accident as she feels no pain. So, to feel pain is important and possibly a good thing.
When pain occurs acutely, then most often than not it means one has sustained some form of bodily inury. This is different in those who suffer from chronic pain, where though often the injury has healed but the tissue continues to defectively trigger or fire pain impulses causing pain. Chronic pain is a whole lot of a different scenario and involves behaviour modification and gradual tolerance and counselling with minimal dependence on medication.
Acute pain for instance after a surgery or trauma is a totally different ball game. Many physicians and nurses have under-recognised its importance causing in prolonged hospital stay and increased in post-trauma or post-surgery complications.
All this while, to assess for patients health status, the nurses would record a few vital signs to enable us to intepret and assess patient improvements or deterioration. These vitals that were taken mainly by the nurses included the blood pressure, pulses, respiratory rate and the body temperature. Pain has always been the neglected sign and has caused much confusion and fear among some regarding the usage of pain-killers and disregard from health care workers.
To ensure proper management of pain and reduction of usage of unnecessary painkillers(analgesia), the Veterans Health Administration (VHA) has introduce a directive to enable pain be assessed objectively and treated promptly and thus increase patient comfort and compliance to their chest and limb physiotheraphy. In Malaysia, Selayang Hospital is pioneering this before implementing all over the country and as you have guessed, my ward and the neighbouring male surgical ward have started treating pain as the fifth vital sign.
Assessment of pain is made objectively by combining :
1. Wong-Baker Faces Pain Rating Scale

2. Numerical Pain Scale
The numerical pain scale, uses a scale from 0 to 10; where 0 represents no pain and 10 represents the worst pain imaginable.

3. functional ability
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* Where is the pain?
* When did it start?
* What makes it worse?
* What helps to ease it?
* Is it sharp, dull, aching, throbbing, shooting, burning?
It is important to understand that medications will not cure your pain or eliminate it. Medications work in many ways to help ease your pain such as by changing how your brain perceives the pain, by improving your flexibility, by treating underlying factors causing your pain, or by reducing inflammation or swelling.
Hopefully, pain as the fifth vital sign would stay as an assessment tool. It would also bring physicians back closer to their patients as this assessment though mainly done by nurses would require verification by the doctors and therefore cultivate the need to talk and touch your patients which in this modern age is very much lacking. Are we then making all these assessment as a result of us health care providers both doctors and nurses are slowly losing that human touch and connection with their patients? Maybe that is for another post to blog.









