Clinical decision support that reasons like a spine surgeon: catch cauda equina before continence goes, weigh surgery against conservative care for the disc, screen the red-flag back, and decompress the progressive myelopathy — with the decision rule and exactly what would change it. Built for verified physicians.
Two real spine-surgery questions, each reasoned the way HeyHippocrates answers: the skills fire, the answer is cited, the decision rule is explicit, and what's missing is flagged. Scroll to each.
Acute bilateral sciatica with saddle numbness and new urinary retention — the move?
This is cauda equina syndrome until proven otherwise, and it is a surgical emergency. Get an urgent whole-spine MRI immediately — do not wait for a routine slot — and refer for emergency decompression, ideally within 24 to 48 hours, because delay risks permanent bladder, bowel and sexual dysfunction. At the bedside check perianal sensation, anal tone and the post-void residual, but remember a reassuring exam does not exclude it when the history fits; image anyway. Time is continence.
Decision ruleBilateral sciatica + saddle anesthesia + bladder or bowel dysfunction → cauda equina; urgent whole-spine MRI immediately + emergency surgical decompression (ideally within 24–48 h); a normal exam does not exclude it — image on the history.
Not established from this alone — the MRI, the sphincter exam and the time course change the urgency and the surgery.
Six weeks of unilateral sciatica from an L5-S1 disc herniation, no red flags and no progressive deficit — surgery or not?
Most lumbar disc herniations improve with time and conservative care — staying active, analgesia and physiotherapy — over six to twelve weeks, and the imaged herniation often regresses. Microdiscectomy relieves radicular pain faster, but the long-term outcomes converge, so reserve surgery for radiculopathy that is severe or persistent despite good conservative care, or for a red flag, a progressive motor deficit or cauda equina. Decide with the patient by the pain burden and preference — the MRI finding alone does not mandate an operation.
Decision ruleDisc herniation with radiculopathy, no red flags → conservative first (activity, analgesia, physiotherapy) 6–12 weeks; microdiscectomy for severe or persistent radiculopathy despite conservative care, or red flag / progressive motor deficit / cauda equina; imaging alone does not mandate surgery.
Not established from this alone — the deficit, the response to conservative care and the patient goals change the decision.
Illustrative simulations. The physician always decides.
The exact questions your field searches for — answered in the format the knowledge base speaks: the answer, the decision rule, what's missing, and the source.
Suspect cauda equina in anyone with new bladder or bowel dysfunction, saddle or perineal numbness, bilateral or severe sciatica, or sexual dysfunction. Perform an urgent MRI of the whole lumbosacral spine — the only definitive test — and check perianal sensation, anal tone and the post-void residual volume. A confirmed compression needs emergency surgical decompression, ideally within 24 to 48 hours, since a longer delay predicts worse continence recovery. Never reassure and discharge on a suggestive history because the exam looks normal.spine emergency
Decision ruleRed flags (new bladder/bowel dysfunction, saddle numbness, bilateral or severe sciatica) → urgent whole-spine MRI + sphincter exam + post-void residual; emergency decompression within 24–48 h; never discharge on a suggestive history despite a normal exam.
Missing data: the MRI, the sphincter function and the timing change the urgency.
Manage the uncomplicated herniated disc conservatively first: most radicular pain settles over weeks with activity, analgesia and physiotherapy, and an epidural steroid injection can bridge severe pain. Offer surgery — usually microdiscectomy — when the radiculopathy is severe or persists beyond six to twelve weeks despite good conservative treatment, and treat it urgently for a progressive motor deficit or cauda equina. Surgery gives faster relief; the two-year outcomes are similar, so preference and pain burden drive an elective decision.NASS · lumbar
Decision ruleUncomplicated disc herniation → conservative first (activity, analgesia, physiotherapy, and an epidural steroid); microdiscectomy for severe or persistent radiculopathy beyond 6–12 weeks; urgent surgery for progressive deficit or cauda equina; elective choice by preference and pain burden.
Missing data: the deficit, the duration and the patient preference change the plan.
Most acute low back pain is mechanical and self-limited, so the job is to catch the few dangerous causes. Screen for cauda equina — bladder or bowel change, saddle numbness, bilateral sciatica; for fracture — significant trauma, osteoporosis, chronic steroids, older age; for malignancy — a cancer history, unexplained weight loss, night pain, age over fifty; and for infection — fever, intravenous drug use, immunosuppression, a recent procedure. A red flag prompts imaging and labs; without one, image sparingly and treat conservatively.red-flag screen
Decision ruleScreen for cauda equina (sphincter/saddle/bilateral), fracture (trauma/osteoporosis/steroids/age), malignancy (cancer history/weight loss/night pain/over 50), infection (fever/IV drug use/immunosuppression); red flag → imaging + labs; none → conservative, image sparingly.
Missing data: the red flags, the history and the neurologic exam change the workup.
Recognize cervical myelopathy from its signs, not neck pain alone: hand clumsiness and loss of fine motor control, a broad-based unsteady gait, and upper-motor-neuron signs — hyperreflexia, a positive Hoffmann sign, clonus, an extensor plantar. Confirm with cervical MRI showing cord compression and signal change. Because it usually progresses in a stepwise way and rarely reverses, offer surgical decompression for moderate-to-severe or progressive disease; observe only the mild, stable case with close follow-up. Early decompression protects function.cervical myelopathy
Decision ruleMyelopathy signs (hand clumsiness, gait imbalance, hyperreflexia/Hoffmann/clonus) + MRI cord compression and signal change → surgical decompression for moderate-severe or progressive disease; observe only mild stable disease with close follow-up; it rarely reverses, so treat progression early.
Missing data: the severity, the progression and the MRI change surgery versus observation.
Your whole practice, one specialist brain — grounded in champion-authored, cited knowledge.
A generalist spine-surgery colleague across the spinal emergency, degenerative lumbar and cervical disease, red flags, trauma and the conservative-versus-operative decision — cited, non-directive, always with the decision rule.
Deep specialist agents for degenerative lumbar and cervical disease, spinal trauma and deformity, spinal oncology, and the conservative-care pathway — each its own soul and knowledge base — plus your own uploaded materials.
From the cauda-equina clock to the elective disc decision the margin is thin. Only one of these reasons like a spine-surgery colleague whose every claim you can trace.
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It reasons in the frameworks you use — the cauda-equina red flags, the disc-herniation decision, the low-back red-flag screen and the myelopathy signs — and always shows the reasoning, the decision rule and what would change it. The decision always stays your call.
Both. Residents use it to pressure-test a plan and learn the decision rule; attendings use it as a fast, cited second opinion in clinic and on call. Access is gated to verified physicians.
Degenerative lumbar and cervical disease, spinal trauma and deformity, spinal oncology, and the conservative-care pathway each have their own deep specialist agent on the Pro plan, on top of the full spine-surgery scope on Basic.
No. It is physician-facing clinical decision support — a cited thinking partner. It does not diagnose, does not treat, and gives no patient-facing advice. The decision always stays with you.
Every answer is grounded only in champion-authored, cited spine-surgery knowledge — traceable, not hallucinated — and always states the decision rule plus what data is missing, instead of a confident guess.
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