A recording of this presentation is available HERE
Thanks to Dr. Kendall Jones for a fantastic opener for R3/Senior Grand Rounds presentation this week. She borrowed from a lecture she attended last spring at the Family Medicine Colloquium by Kaiser Family Medicine teachers. . .but really brought it home to our patient population.
If you are a primary care clinician caring for patients with functional disorders (think IBS, migraine, fibromyalgia. . .and all those unn-nameable conditions), you should watch this!
Functional Disorders
Medical school trains us well to investigate mechanical/structural abnormalities (e.g. SBO, carotid stenosis, hip fracture), assess for biochemical abnormalities (e.g. low hb, elevated a1c, hyperthyroidism), but does not prepare us for functional disorders-- which, by definition, have no specific tests. Functional disorders are diagnosed with symptom assessments, validated tools, in combination with negativing imaging/labs or other work-up.
And yet, in primary care, we see a LARGE number of patients with functional disorders. Here are a few:
These patients are challenging. They bring up a lot in clinicians, and they don't always get the care they need. Sometimes they are left to steer their own ship (which doesn't reliably make them better), they get HUGE work ups (all of which turn out negative or equivocal), and they get labels that do not really apply, labels that are hard to remove.
Dr. Jones reminded us that we use clinical judgement all the time to make diagnoses-- think a viral URI or a migraine. For these patients, we use illness scripts and confidence in our experience. This same notion applies to patients with functional disorders.
Central Sensitization
Central sensitization is a state of persistent CNS hyper excitability in which the brain and spinal cord amplify incoming signals beyond their objective magnitude. The "volume of the nervous system" is literally turned up. This is not psychological. It is driven by neuroinflammation, HPA axis dysregulation, synaptic plasticity in the dorsal horn, reduced descending inhibition, and more. This phenomenon is propagated via ACEs, chronic stress, trauma, perception, expectation, and neuroplasticity.
I LOVE this fire alarm analogy!
Reminder: our job is NOT to keep searching for a fire.We need to be able to recognize patterns of central sensitization:
- multi-system symptoms with no unifying biomedical lesion (though don't forget connective tissue and EDS)
- severity out of proportion to objective findings-- the gap is the signal amplification
- symptoms fluctuate with stress, sleep
- prior extensive negative work up but patient remains symptomatic
- presence of ACEs or chronic stress (which patient may not have insight into)
- hypervigilance: symptom tracking, googling, frequent visits, lots of messages
- sensory hypersensitivity: light, sound, temperature, touch, odors (more than just pain)
When tests come back negative, avoid "everything is fine", "your tests are normal", "nothing is wrong", "maybe you're stressed". These statements do not explain what IS happening for the patient and leave them searching for another explanation.
Communication is key!
Somatic Symptom Scale - 8. Gierk B et al. JAMA Intern Med. 2014.
Eight items rated 0-4 over the past 7 days (GI, back pain, limb/joint pain, HA, CP/SOB, dizziness, fatigue, sleep)
8-11 = medium, 12-15 = high, 16-32 = very high.
Each category increase is associated with 53% more healthcare visits
CSI: Central Sensitization Inventory. Mayer TG et al. Pain Pract. 2012; Neblett R et al. J Pain. 2013
Part A: 25 items, scored 0-100
Part B: Prior CSS diagnoses (unscored, clinical context)
Cutoff ≥ 40: 81% sensitivity, 75% specificity for CS syndromes
<30 = subclinical, 30-39 = mild, 40-49 = moderate, 50-59 = severe
Treatment of Central sensitization:
Education: normalize, reframe: "Your symptoms make sense to me. Let's try to understand what is going on." Discuss the context/ask the question: "What do you think is making your nervous system so sensitive?" Help change their relationship with their symptoms-- to decrease their fear. Remember, having somatic symptoms is part of living inside a body.
Nervous system retraining: mindfulness based pain reduction, breathing exercises, cold exposure (resets the mamalian dive reflex), singing, humming, yoga, meditation, massage (feet and neck)
Central sensitization and Chronic pain
- nociplastic pain happens over months to year; it can be at least partially reversed with desensitization of the oversensitized alarm
- patients have to be patient (months to years) to notice improvement
- patients and physicians benefit from moving away from "symptoms" into acceptance, understanding an rehabilitation>> goal is improving quality of life and increasing function
- movement is key: motion is lotion
Mohabbat AB & Wilkinson J (2023). Central sensitization: when it is not all in your head. Am Fam Physician. 101 (1):92-96
G. Lorimer Moseley & D Butler (2017). Explain pain supercharged: the clinician’s manual.
tamethebeast.org (refer patients with chronic pain to this website)
Van Oosterwick J et al. (2013). Pain physiology education improves health status in fibromyalgia. Clin J Pain. 29(10):873-82.