Ask before you move: lines, tubes, and the physiologic scan in pediatric acute care

Your first acute care patient is a four year old, two days post-op. She has a peripheral IV in her left hand, an NG tube taped to her cheek, a pump running, and a monitor above the bed showing a heart rate of 138. The order says mobilize.

Nothing in a classroom quite prepares you for that hardware, and the number on the monitor looks alarming until you remember she is four. Three things make the moment manageable, and they are the same three every time: read the child before the monitor, weigh recovery over peak, and know the one rule that governs every line.

The physiologic scan comes first

Inpatient pediatric physical therapy supports safe mobility, functional recovery, and prevention of secondary complications during acute illness, injury, or medical intervention. The children are medically complex, and their functional status can change quickly with illness severity, surgery, or instability. That is why evaluation in the hospital is guided by medical stability, current lines and equipment, pain, and fatigue before it is guided by anything you learned about gait.

Early mobilization, when it is medically appropriate, reduces deconditioning and supports functional outcomes in hospitalized children. The job is to grade activity to tolerance while monitoring the physiologic response. Four habits carry that job, and the Playbook teaches them as a Student Clinical Anchor:

• Look at the child before the monitor.
• Behavior changes before numbers.
• Recovery after activity matters more than peak values.
• When unsure, pause and reassess.

Children compensate differently than adults. Vital signs can change suddenly after looking stable, and distress usually shows in color, breathing pattern, engagement, and movement quality before the monitor agrees. Crying, anxiety, and pain elevate heart rate and respiratory rate on their own, so a number taken mid-protest tells you about the protest, not the heart.

Age changes what normal looks like

The most common student error in pediatric acute care is applying adult expectations. A resting heart rate that would worry you in a 40 year old is ordinary in a toddler. The Playbook's clinical reference gives the ranges by age group along with what a PT should watch for during activity. A condensed version:

Age group	Heart rate (bpm)	Respiratory rate (breaths/min)	What PTs watch for
Infant, 1 to 12 months	100 to 150	30 to 50	Work of breathing during movement, endurance with rolling or sitting, sweating with activity
Toddler, 1 to 3 years	90 to 140	24 to 40	Recovery after activity, breath holding during crying, coordination with movement
Preschool, 3 to 5 years	80 to 120	22 to 34	Ability to talk during activity, posture during breathing, fatigue signs
School age, 6 to 12 years	70 to 110	18 to 30	Exercise tolerance, pacing strategies, recovery time
Adolescent, 13 to 18 years	60 to 100	12 to 20	Conditioning level, orthostatic symptoms, breathing control during exertion

Oxygen saturation runs 95 to 100 percent across every group. The red flags that end a session are the same in spirit at every age: sustained tachycardia at rest, labored breathing, pallor, dizziness, a heart rate that does not recover after rest, and in the older child chest pain, lightheadedness, or syncope.

Back to the four year old with a heart rate of 138. She is a preschooler, so her resting range tops out around 120, but she is also two days post-op, in pain, and looking at a stranger. The first move is not to cancel. It is to let her settle, then look again.

Recovery matters more than the peak

Five pitfalls account for most of the mistakes students make with pediatric vitals, and they are worth naming in the order they cost you.

1. Overreacting to a high heart rate during play or distress. Crying, excitement, and an unfamiliar room all push the numbers up. Reassess when the child is calm before drawing a conclusion.
2. Ignoring recovery time. The number during activity is the one everyone stares at. The number after rest is the one that means something. A child whose vitals normalize appropriately after rest has demonstrated tolerance. A child whose heart rate stays up at rest has shown you something else, and that is worth a conversation with nursing.
3. Watching the monitor instead of the child. Experienced pediatric therapists observe first and confirm second.
4. Applying adult expectations. Age-specific ranges are the only ranges that interpret correctly.
5. Forgetting baseline. Diagnosis, medications, fatigue, and yesterday's session all shape today's numbers. A trend across sessions tells you more than any single reading.

Every line has a rule, and the rule is usually about traction

Hospitalized children often carry several lines and tubes at once: peripheral IVs, central venous catheters, arterial lines, PICC lines, implanted ports, NG and G-tubes, urinary catheters, chest tubes, and drains. You do not need to memorize the whole safety table on day one. You need to know what each line is for, where it goes, what would dislodge it, and when the answer is to call the nurse before you move.

• Peripheral IV. Keep the site visible, leave slack in the tubing, avoid pulling or twisting. Call first if the IV is in the limb you need for weight bearing or for the walker, if the site looks irritated, or if the tubing is taut.
• PICC line. No traction on the line. Arm movement within comfort. Dressing intact before you start. Call if the dressing is loose or wet.
• Central venous line. Extra caution with head and neck turns, tubing secured, and do not let the child roll onto it. Call every time in the ICU, with multiple infusions, or if the line looks unsecured.
• Arterial line. Do not bend or kink the limb, keep the transducer level, avoid traction. Call every time before out of bed or ambulation.
• NG tube. Secure it to the gown, keep the tubing off the floor, and do not tug. If the tape has loosened, the child is grabbing at it, or there has been recent emesis, that is a call.
• G-tube. Avoid traction, watch tubing length, protect the site. Call if feeds are running and you need prone or active mobility.
• Chest tube. Keep the system upright, avoid kinks, never lift by the tubing. Call before the first mobilization, and any time you are unsure whether it is on suction or water seal.
• Foley catheter. Keep the bag below the bladder and secured before standing. Call if the bag needs emptying, the tubing is snagged, or output suddenly changes.
• Tracheostomy or ventilator. Avoid traction, keep the ties secure and the tubing supported. Ventilated patients are always a team mobilization, coordinated with respiratory therapy and nursing.

The pattern underneath all of it: know what it does, keep slack, keep it visible, and ask nursing before you move anything you are unsure about. Safe mobility in a medically complex child is a planning problem before it is a handling problem. Plan it out loud with the nurse, then move.

What goes in the note

Documentation in this setting should reflect the child's medical complexity, the equipment involved, and the safety measures used. Record the vital sign response before, during, and after activity, the assistance needed for line management, and the communication with the medical team. A note that reads "tolerated well" says nothing. A note that reads "heart rate 138 at rest pre-session, 152 during supported sit to stand, 128 after two minutes seated; PIV in left hand kept visible, NG secured to gown; nursing consulted before out of bed" is a clinical record someone can act on tomorrow.

The whole physiologic scan fits on one line: look at the child before the monitor, behavior changes before numbers, recovery matters more than peak, and when unsure, pause and reassess. It will carry you through most of a first acute care rotation.

Drawn from Chapters 22 and 23 of the Pediatric PT Playbook: the pediatric vital signs clinical reference, the physiologic scan anchor, the common student pitfalls, and the full line and tube safety table.