2.3 Focused History and Physical

A focused history and physical is hypothesis-driven. You start with the chief concern, generate a short differential that includes the dangerous few and the common many, then collect only the history, ROS, and exam maneuvers that sort those hypotheses. The ANCC skill is not “do less work.” It is do the right next data. Under-collection misses epidural abscess, ACS, and meningococcemia. Shotgun exams waste time, create incidental findings, and still miss the question you never asked.

The focused sequence

1. Chief concern in the patient's or parent's words.
2. HPI with OLDCARTS, plus the three to six associated symptoms that make a dangerous diagnosis more or less likely.
3. Targeted PMH, PSH, and medications that change risk — anticoagulation, immunocompromise, diabetes, pregnancy, recent surgery, chronic steroids.
4. Relevant ROS only. Cardiopulmonary ROS in chest pain. Neurologic, bowel, and bladder ROS in back pain. Hydration and urine output in pediatric fever. You are not collecting a 14-system inventory to make the note look comprehensive.
5. Focused exam that can change management today.
6. Stop, expand, or send out when a red flag appears.

Rule of thumb: rule out the dangerous few, then diagnose the common. For acute low back pain the dangerous few are cauda equina, spinal infection, fracture, and malignancy. For pediatric fever they include sepsis, meningitis, and (in toddlers) Kawasaki disease when the duration and features fit. Once those are reasonably unlikely, you may diagnose mechanical strain or viral pharyngitis without a full genital or funduscopic exam.

Red flags that expand or terminate a focused visit

A red flag does not mean “order everything in the office.” It means the focused primary-care visit is no longer the right container.

Avoid the two failures

Under-collection looks like treating adult sore throat without a sexual history (acute HIV, gonococcal pharyngitis) or treating dysuria in a man as “simple cystitis” without asking about discharge, partners, and systemic symptoms. Over-collection looks like a rectal exam on every back-pain patient “just in case,” or a 14-system ROS on a well-appearing 7-year-old with 24 hours of isolated sore throat. If a maneuver cannot change today’s decision and the dangerous alternatives are already unlikely, skip it and document the pertinent negatives you used.

Pertinent negatives are the medical-legal core of a focused note. “No saddle anesthesia, no bowel or bladder change, no fever, no IV drug use, no cancer history, walking independently” is more useful than a copied comprehensive ROS. Write the hypothesis you ruled out, the data you used, and the return precautions.

Vignette: 7-year-old with sore throat

J. is 7, fully immunized, with 36 hours of sore throat and a home temperature of 38.6 °C. He has no cough, is taking ice pops, and is voiding normally. He is sitting on the exam table, not toxic.

Must-ask. Drooling or tripod positioning (cannot handle secretions), trismus, voice change, rash, sick contacts, hydration and urine output, immunocompromise, and whether Hib and pneumococcal vaccines are actually complete.

Must-examine. General appearance, hydration, oropharynx including peritonsillar landmarks and whether the uvula is midline, cervical nodes, ears, lungs, and fully exposed skin (sandpaper rash of scarlet fever; petechiae that would end this as a simple pharyngitis visit). You do not need a genital exam, a funduscopic exam, or an abdominal ultrasound.

Centor or McIsaac features (fever, no cough, tender anterior nodes, tonsillar exudate, age) guide whether a rapid antigen detection test is worth doing versus supportive care. Convert if the child becomes toxic, cannot handle secretions, has a unilateral tonsillar bulge, or has petechiae plus fever. Those are different diseases.

Vignette: 68-year-old with acute low back pain

R. lifted a grandchild yesterday. Pain is paramedian lumbar, worse with flexion, no leg weakness, and he walked into the room.

Must-ask. Bowel or bladder change, saddle anesthesia, fever, injection-drug use, recent infection or spinal procedure (epidural abscess), cancer history, unexplained weight loss, rest or night pain, and — if the “back pain” followed a collapse — anticoagulation and head strike. Medications to extract: warfarin or a DOAC, chronic steroids.

Must-examine. Vital signs, gait, lumbar inspection and palpation, straight-leg raise, and a focused neurologic exam (L4–S1 strength, sensation, reflexes). Perianal sensation and rectal tone belong in the visit if cauda equina is a live hypothesis, not as a wellness ritual.

Convert or send out for saddle anesthesia, new incontinence, progressive motor loss, fever with spinal tenderness, or a story that suggests pathologic fracture. If none of those are present, this stays a focused mechanical-back-pain visit with early mobilization teaching. Age 68 does not mandate same-day MRI, and this is not the moment to add a comprehensive well-man exam.

Vignette: 22-year-old with dysuria

A. has two days of dysuria and frequency, no fever, last menstrual period three weeks ago.

Must-ask. Vaginal discharge, pelvic or lower abdominal pain, pregnancy possibility, new or multiple partners, condom use, known STI exposure, flank pain, immunocompromise, hematuria, and fever or chills that would suggest pyelonephritis.

Must-examine. Vitals (is there fever?), CVA tenderness, abdominal exam. Perform a pelvic exam if cervicitis or PID is in the differential — discharge, a new partner, or lower abdominal tenderness. Always obtain a pregnancy test in anyone who can be pregnant. A well-appearing patient with typical cystitis and no PID features can be managed from a focused visit plus urinalysis. Convert if she is pregnant, febrile, CVA-tender, or if abdominal or adnexal tenderness suggests PID. Those are different diagnoses and different dispositions. A Pap, if she is 21 or older and overdue, is a separate preventive task — do not let it replace the focused GU assessment, and do not force a speculum exam the patient did not consent to in order to “complete a physical.”

When to convert to comprehensive or send out

Convert to a same-day expanded visit or a scheduled comprehensive visit when the patient is new without records and the acute problem is stable. Finish the danger assessment first. Send out when the dangerous few cannot be excluded in primary care: unstable vitals, suspected ACS, cauda equina, a febrile infant in a protocol window, head strike on anticoagulation, an acute abdomen, or suicidal intent with a plan. The focused note then becomes a transfer note: what you asked, what you found, and why the clinic is the wrong setting.