UNIT 10 PAIN Flashcards
Pain is:*
what ever the experiencing person says it is existing whenever he says it does
Name the Five Pain Pathways and Processes*
Nociception Transduction Transmission Perception Modulation
What is Nociception*
Normal processing of painful stimli or The ability to feel pain
What is Transduction?*
First injury occurs and release substances that activate nociceptors.
What are Nociceptors?*
Peripheral structures that are specialized receptors in the skin an internal organs that are sensitive to noxious stimuli.
Be specific: Where are Nociceptors found and what are the three types?*
Found in skin , blood vessels, fascia, internal organs, and joints and other structures. Peripheral nerve cells where nociceptors located.
- Thermoreceptors - temp
- Chemoreceptors - chemical
- Mechanical receptors - pressure
First Responder is*
A-Delta - Fibers = Sharp well localized pain
Second Responder is*
C-Fibers = slow responding dull poorly localized and persistent
Bradykinin is a powerful ____ that increases ___ ___ and constricts __ ___.
a powerful vasodilator that increases capillary permeability and constricts smooth muscle
Prostaglandins are important ____-like substances that __ additional ___ stimuli to the ___.
Prostaglandins: important hormone-like substances that send additional pain stimuli to the CNS
Substance P sensitizes ___ on ___ to feel ___ and also ____ the rate of firing of ___.
Substance P: sensitizes receptors on nerves to feel pain and also increases the rate of firing of nerves
Seven Steps of Transmission: Stimuli is transmitted from pain receptors by way to sensory nerves…
Stimuli is transmitted from pain receptors by way to sensory nerves
- into the dorsal root ganglia
- The impulse enters the spinal cord, and synapses terminate in the dorsal horn of the spinal cord
* 3. Substance P a neurotransmitter assists the impulse to cross the cord and ascend up the spinothalamic tract - And areas of the midbrain
- to the thalamus
- where sensation of heat, cold pain and touch identified
- Location and intensity of pain is perceived in the cortex
Specific receptors receive… 3*
Endogenous opiods
Endorphins
Enkephalins
What are Endogenous opioids*
___ and ___ – made by ___ – produce ___ affect by binding to ___ receptors
serotonin and norepinephrine – made by body – produce analgesic affect by binding to opioid receptors
Endorphins*
___ ___ ___ and ___ thought to be released with ___ stimulation (___)
prolonged pain relief and euphoria thought to be released with skin stimulation (massage)
What does Enkephalins* do?
inhibits release of substance P at afferent neurons
What occurs during pain perception?
Spinal reflexes
Muscles near pain site contract
Protective Response
Types of Pain*
- Acute Pain
- Chronic Pain
- Cancer/Malignant Pain
- Persistent Pain / Central Sensitization
- Long Term Central Sensitization
Acute Pain* 1. Cause usually \_\_\_ - follows \_\_\_ \_\_\_ process 2. Intensity usually \_\_\_ with \_\_\_. 3. Is \_\_\_ - \_\_\_ sign 4. May have \_\_\_ signs \_\_\_ and \_\_\_ signs. i.e: increased: \_\_ \_\_\_ \_\_ Facial \_\_\_ & \_\_\_ Lack of _/_ does not mean \_\_\_ pain.
- Cause usually known – follows nociceptive pain process
- Intensity usually decreases with healing
- Is protective - warning sign
- May have observable signs behavioral and physical signs
Increased HR, Resp, b/p
Facial grimacing, guarding,
Lack of s/s does not mean no pain
Chronic Pain*
- What are the 3 characteristic of pain?
- Serves no ___ ___ – may be difficult to___
- ___ pain signaling both ____ or ___.
- ___ and___ – lasts longer than _ to _ mos.
- ___ & ___ pain responses not present
- ___ and ___.
- Persistent, intermittent or limited
- Serves no useful purpose – may be difficult to localize
- Abnormal pain signaling both peripheral or central
- Irreversible and cyclical – lasts longer than 3 to 6 mos
- Physical & behavioral pain responses not present
- Remissions and exacerbations
Cancer / Malignant Pain*
- May be __ __that cause seeking ___.
- Associated with what four things?
- Pain related to what three things?
- Cancer pain has what kind of qualities
- Why may pt not want to report their pain?
- With proper interventions what is possible?
- May be first symptom that cause seeking treatment
- Associated with chemotherapy, radiation, tissue & organ destruction
- Pain related to hormones, neurotransmitters and enzymes
- Cancer pain has acute and persistent qualities
- Reluctant to report since can indicate progression of disease
- With proper interventions may be relieved
Persistent Pain / Central Sensitization
- __ signals bombard ___ and ___ system adaption over time can lead to ___ effects of pain.
- What is it characterized by (give e.x)?*
- What is hyperexcitable?*
- Nerve signals bombard CNS
Nervous system adaptation over time – lead to the detrimental effects of pain - Characterized by enhanced pain to mild noxious stimuli ( rheumatoid arthritis inflammation)
- Light touch causes continuous or very frequent input to CNS = hyperexcitable
Long Term Central Sensitization*
- What is Allodynia?
- What is Hyperglasia
- Allodynia =
abnormal pain signals results in perceived pain with mild, non-painful stimuli
Light touch or blankets on feet = sudden pain - Hyperglasia =
exaggerated response to normal painful stimuli
Lower pain tolerance
Hot liquids on sore throat
Source of Pain: Nociceptive Pain
Name and describe the three types?*
*1. Somatic - originates in the bone, skin and soft tissue. well localized/easy for the patient to point out location. Characterized by throbbing and aching. Example Sprained ankle and metastatic bone pain
*2. Visceral Pain
Originates internally
Due to stretching, distension inflammation or damage to organs
Described as aching, throbbing, cramping, pressure deep or radiating
Pain diffuse and difficult to locate ( MI pain)
- Referred Pain - Pain that originates in one part of the body but perceived in another area
What are the two common responses to pain? *Pg 1157 Box 34-1
- Physiologic/ Invonluntary
- superficial and moderate
- increased b/p, p and r
- dialated pupils
- muscle tension and rigidity
- pallor - Severe and Deep Pain
- n/v
- fainting an unconscious
- Decrease P and b/p , rapid and irregular breathing
- Prostration,
Behavioral Signs of Pain and their Affects
Moving away from painful stimuli
Grimacing moaning and crying
Restlessness
Protecting the painful area and refusing to move
Affects
Withdrawal, Anxiety, Depression, Fear, Anger, Anorexia, Fatigue , Hopelessness, Powerlessness