5.4 Other Systems Quick-Hit (Endocrine, GI, GU, Hematology)
Key Takeaways
- Blood glucose below 70 mg/dL is hypoglycemia; if the patient is alert, deliver about 15 grams of fast-acting carbohydrate, retest in 15 minutes, and hold exertion until levels stabilize.
- PTAs should avoid scheduling vigorous exercise at peak insulin action and should not have a patient inject insulin into a muscle that is about to be heavily exercised.
- Hyperthyroidism presents with heat intolerance, weight loss, and tachycardia; hypothyroidism presents with cold intolerance, fatigue, and bradycardia, both altering exercise tolerance and requiring PT communication.
- Internal pelvic floor examination is outside PTA scope; PTAs may deliver external surface biofeedback, behavioral education, and therapeutic exercise inside a PT-written pelvic-health plan of care.
- A sickle cell pain crisis is managed by stopping exertion, supporting hydration and oxygenation, keeping the patient warm, and immediately involving the supervising PT or medical team.
Diabetes And Exercise
Patients with diabetes mellitus need careful glucose monitoring around therapy. The PTA's contribution is recognizing when not to exercise and how to respond when glucose values fall outside safe windows.
- Hypoglycemia — Blood glucose below 70 mg/dL. Adrenergic signs include shakiness, sweating, tachycardia, hunger, confusion, and pallor. If the patient is alert and can swallow, follow the 15-15 rule: give about 15 grams of fast-acting carbohydrate (4 oz juice, glucose tablets), wait 15 minutes, and retest. Repeat until above 70 mg/dL, then give a small protein/carbohydrate snack and report the episode to the supervising PT.
- Hyperglycemia — Pre-exercise glucose above 250 mg/dL with ketones, or above 300 mg/dL regardless of ketones, generally warrants holding vigorous exercise and notifying the PT or nursing staff.
- Insulin timing — Avoid strenuous activity at peak insulin action, the highest-risk window for hypoglycemia. Do not have the patient inject insulin into a muscle about to be heavily exercised, because local blood flow accelerates uptake.
- Foot care — Inspect feet every visit; neuropathy lets small wounds progress unnoticed, linking this section to Wagner grading earlier in the chapter.
Two additional diabetes pearls show up regularly. A patient on a beta-blocker may not display the usual adrenergic warning signs of hypoglycemia (the tachycardia and tremor are blunted), so the PTA cannot rely on "the patient looks fine" and should keep a glucometer and fast-acting carbohydrate accessible. And exercise itself improves insulin sensitivity for hours afterward, meaning a delayed (post-session) hypoglycemic episode is possible; the PTA educates the patient to monitor glucose after therapy, not only before it.
Thyroid Disorders
| Disorder | Common Findings | PT/PTA Implication |
|---|---|---|
| Hyperthyroidism (e.g., Graves disease) | Heat intolerance, weight loss, anxiety, tremor, tachycardia, exophthalmos | Monitor heart rate closely; progress intensity slowly; watch for arrhythmia and heat |
| Hypothyroidism (e.g., Hashimoto thyroiditis) | Cold intolerance, weight gain, fatigue, bradycardia, dry skin, proximal weakness | Expect lower exercise tolerance; allow longer warm-ups and rests; report worsening fatigue |
Untreated thyroid storm (hyperthyroid crisis with hyperthermia and severe tachyarrhythmia) and myxedema coma (profound hypothyroid decompensation) are medical emergencies — stop therapy and summon medical help.
Gastrointestinal And Genitourinary Considerations
The GI and GU domains contribute a small share of items (each roughly in the 0-4 range on the FSBPT outline), but a few high-yield rules recur.
- Reflux (GERD) — Avoid prolonged supine positioning right after meals; favor head-of-bed elevation and upright exercise positions when symptomatic.
- Bowel/bladder programs — PTAs reinforce timed voiding, fluid scheduling, fiber intake, and safe transfer mechanics inside a PT-written plan.
- Pelvic floor rehabilitation scope — Internal vaginal or rectal examination, internal biofeedback sensor placement, and intra-cavity electrical stimulation are PT-only interventions in most jurisdictions. The PTA may deliver external surface biofeedback, behavioral education, posture/breathing strategies, and external therapeutic exercise (e.g., reinforcing Kegel technique) when the supervising PT has documented these tasks and the state practice act allows.
- Catheters and ostomies — Keep urinary drainage bags below the bladder to prevent reflux, manage stoma sites carefully during exercise, and avoid traction on lines and tubing during transfers.
Hematology Quick Hits
Lab-value awareness is a recurring System Interactions theme. Institutional guidelines vary, but these thresholds anchor the exam reasoning.
| Finding | Typical Threshold | PTA Implication |
|---|---|---|
| Anemia | Hemoglobin below ~8 g/dL | Reduced oxygen-carrying capacity; light activity, monitor for fatigue/pallor, report symptomatic patients |
| Thrombocytopenia | Platelets below ~20,000/microL | Bleeding risk; defer resistive/contact activity; light aerobic activity may be allowed per plan |
| Neutropenia | Absolute neutrophil count below ~500/microL | Infection risk; reverse-isolation precautions, restrict aerobic/group activity per protocol |
- Sickle cell disease and crisis — A vaso-occlusive crisis presents as severe musculoskeletal or abdominal pain, often triggered by dehydration, cold exposure, hypoxia, or exertion. Response: stop exertion, support hydration and oxygenation, keep the patient warm, and immediately notify the supervising PT or medical team. Compression therapy is not used to treat a sickle crisis.
- Deep Vein Thrombosis (DVT) — Suspected acute DVT (new unilateral calf swelling, warmth, tenderness) means holding lower-extremity exercise and reporting; mobilization resumes only after the medical team clears the patient and anticoagulation is established.
Bone Health And BLT Precautions
Osteoporosis intersects this review because its precautions overlap with post-operative spinal protocols. PTAs reinforce BLT precautions — no Bending forward, no Lifting more than the prescribed limit (often 5 to 10 pounds), and no Twisting — when the supervising PT prescribes them after vertebral compression fracture, kyphoplasty, or lumbar surgery. Education emphasizes hip-hinge mechanics, log rolling, and avoidance of end-range spinal flexion exercises in patients with significant vertebral osteoporosis, because flexion loading raises anterior vertebral compression-fracture risk.
Weight-bearing and resistance exercise are otherwise encouraged to build bone within the plan of care. Posture training, balance and fall-prevention work, and gentle thoracic-extension strengthening are appropriate, while sit-ups, toe-touches, and rotational trunk machines are avoided.
The unifying theme across this entire "other systems" section is the PTA's two-part job: execute the prescribed plan competently, and recognize the small set of objective red flags — hypoglycemia, suspected DVT, sickle crisis, cellulitis, falling platelet counts, or a thyroid emergency — that require stopping the session, documenting findings, and notifying the supervising PT or medical team before continuing.
Forty minutes into a gait-training session, a patient with Type 1 diabetes becomes pale, diaphoretic, and shaky. The patient is alert and reports feeling 'wobbly.' A fingerstick reads 58 mg/dL. The patient can swallow safely. What is the most appropriate immediate PTA action?
A supervising PT writes a pelvic-health plan of care for a patient with stress urinary incontinence. Which intervention falls within typical PTA scope of practice?