Before You Listen
Episode Setup
- Topic in one line: the polytrauma rehabilitation framework, covering the Veterans Affairs (VA) Polytrauma System of Care, the polytrauma triad of traumatic brain injury (TBI), posttraumatic stress disorder (PTSD) and chronic pain, the bedside Medical Research Council (MRC) sum score for intensive care unit (ICU)-acquired weakness, how the sensory nerve action potential (SNAP) separates critical illness polyneuropathy (CIP) from critical illness myopathy (CIM) within the whole electrodiagnostic study, the Schweickert early-mobilization trial and what came after it, the Assess pain-Both SAT/SBT-Choice of sedation-Delirium-Early mobility-Family engagement (ABCDEF) bundle, blast-injury classification by mechanism, and heterotopic ossification (HO) by anatomic site and population.
- Prerequisites: electrodiagnostic principles from EDX-10 (axonal versus demyelinating polyneuropathy) and EDX-12 (myopathic motor unit potentials), TBI agitation pharmacology, and the deconditioning and venous thromboembolism (VTE) prophylaxis material from REHAB-09.
- Runtime: 44 minutes.
Vignette. A 23-year-old service member presents to a Polytrauma Rehabilitation Center 4 weeks after a roadside improvised explosive device (IED) blast. He sustained a moderate TBI with right frontal contusion, bilateral tympanic membrane rupture, blast lung that required 12 days of mechanical ventilation in the field hospital ICU on cisatracurium and dexamethasone for severe acute respiratory distress syndrome (ARDS) with prone positioning, a left transtibial traumatic amputation, and a closed right femur fracture treated with intramedullary nailing. He is awake, agitated at Rancho Los Amigos Level IV, and inconsistently follows simple one-step commands. Testable muscles are diffusely weak with prominent proximal weakness; pain, the fracture, the amputation and inconsistent participation prevent a standard MRC sum score. Sensation appears intact to pinprick where testable, and reflexes are reduced in the accessible intact limbs. The right thigh is warm and tender over the anterolateral aspect with limited hip range of motion (ROM). Alkaline phosphatase is 320 U/L. Plain radiographs of the hip are unremarkable.
Which findings establish primary blast injury, and can the limb injuries alone establish theirs? How do you assess weakness that will not sit still for a sum score, what is the next step for the hip, and how do you manage the agitation and the orthopedic precautions together?
(Answer at the end of this chapter)
Section 1: The Polytrauma Definition, the VA System of Care, and the Polytrauma Triad
Bottom line: polytrauma is injury to two or more body regions or organ systems with at least one injury life-threatening; an Injury Severity Score (ISS) above 15 is the major-trauma research anchor and is not a VA admission rule. The VA Polytrauma System of Care is a four-tier network anchored by five Polytrauma Rehabilitation Centers (PRCs) at Richmond, Tampa, Minneapolis, Palo Alto and San Antonio, backed by Polytrauma Network Sites, Polytrauma Support Clinic Teams and Polytrauma Points of Contact. The wartime presentation to know is the polytrauma triad of TBI plus PTSD plus chronic pain; quote a prevalence only with the cohort it came from. Civilian polytrauma is dominated by TBI plus orthopedic injury, where cognitive impairment collides with weight-bearing precautions.
Polytrauma is injury to two or more body regions or organ systems with at least one of the injuries life-threatening. Definitions differ by purpose: the Berlin consensus research definition adds physiological and age criteria, and the VA defines polytrauma as injuries to multiple body systems that together produce rehabilitation needs. The numerical anchor you will see is an ISS greater than 15, the major-trauma threshold above which mortality and long-term disability rise steeply. It is not a VA admission criterion. Admission to the Polytrauma System depends on enrollment or TRICARE authorization, clinical stability, rehabilitation need and potential to benefit. VA definition; Berlin research definition.
The clinical implication is competing demands: every rehabilitation problem in a polytrauma patient interacts with every other problem. A weight-bearing restriction is straightforward in a cognitively intact patient and unreliable in one whose TBI keeps him from recalling it. Opioid analgesia costs something different on a ventilator with delirium than it does in an awake, engaged patient.
The VA Polytrauma System of Care (PSC) was built for the multi-system injuries returning from Operation Iraqi Freedom, Operation Enduring Freedom and Operation New Dawn. It has four components. Tier 1 is the five Polytrauma Rehabilitation Centers (PRCs) at Richmond, Tampa, Minneapolis, Palo Alto and San Antonio, delivering comprehensive inpatient interdisciplinary rehabilitation. Tier 2 is the regional Polytrauma Network Sites for post-acute care and regional coordination. Tier 3 is the local Polytrauma Support Clinic Teams for community outpatient management. Tier 4 is the Polytrauma Points of Contact at smaller facilities, which provide limited rehabilitation and refer upstream. VA system; admissions.
The polytrauma triad is the most heavily tested concept in this domain: TBI plus PTSD plus chronic pain in the same returning service member. One blast event concusses the brain, traumatizes the psyche, and tears soft tissue or breaks bone, which is why the three cluster in one patient even though the PTSD and the pain declare themselves later than the injury. They then feed each other. PTSD-driven hypervigilance amplifies pain perception, chronic pain wrecks sleep and worsens PTSD, and TBI-related cognitive impairment limits engagement with trauma-focused psychotherapy. None of the three can be treated in isolation, so rehabilitation, multimodal pain care and trauma-focused psychotherapy are coordinated rather than run in sequence. Prevalence figures are cohort-specific and must be quoted with their denominator: among 340 patients at a single VA Polytrauma Network Site, chronic pain, PTSD and persistent postconcussive symptoms occurred together in 42.1 percent, while a population-based postdeployment cohort found that 2.6 percent used Polytrauma System care, and among those users pain affected 76.5 percent, PTSD 53.1 percent and TBI 48.6 percent. Different cohorts, different diagnoses; neither is a prevalence for all returning service members. Lew 2009; Adams 2019.
In the civilian polytrauma cohort the dominant combination is TBI plus orthopedic injury: long-bone fracture, pelvic ring injury or spinal column fracture. The classic motor vehicle collision pattern is a closed head injury with one or more long-bone fractures and a thoracic or pelvic injury. What this creates is the collision between cognitive impairment and weight-bearing precautions. A patient at Rancho Level IV who cannot recall a partial weight-bearing instruction will mobilize on a healing fracture. Engineer around the deficit rather than rewriting the order: confirm the injury-specific weight-bearing status in the chart, reduce it to one instruction, add environmental cues such as colored tape on the floor and signage on the wheelchair, supply the equipment and transfer method that make the status achievable, and supervise mobility one to one. If the prescribed status is genuinely unworkable, take that back to orthopedics; do not substitute full weight-bearing or non-weight-bearing on your own, and do not assume a femoral nail means all loading is unsafe. AO aftercare.
High Yield — Polytrauma definition and system
- Polytrauma = injury to ≥2 body regions/systems with ≥1 life-threatening. ISS > 15 is the major-trauma research anchor, not a VA admission rule.
- VA PSC is a 4-tier network: 5 PRCs (Richmond, Tampa, Minneapolis, Palo Alto, San Antonio) → Network Sites → Support Clinic Teams → Points of Contact.
- Polytrauma triad = TBI + PTSD + chronic pain; one blast, three wounds. Quote prevalence with its cohort: 42.1% of 340 patients at one Network Site.
- Civilian polytrauma = TBI + orthopedic injury. Follow the written weight-bearing order and make it achievable with cues, equipment and 1:1 supervision.
Mnemonic — “Three Ps Travel Together”
The wartime polytrauma triad is post-traumatic stress, chronic pain, and physical brain injury. One blast event, three lasting wounds, in the same patient. Wherever you find one, screen for the other two.
Our 23-year-old was in an explosion that one single blast event concusses the brain tissue causing a traumatic brain injury or TBI. It traumatizes the psyche leading to post-traumatic stress disorder or PTSD and it tears soft tissue or breaks bone setting the stage for chronic pain. All three happen in the exact same instant.
— MEDREH-12 podcast, ~6:07