Pediatric Obesity Surgical Screener

---
name: pediatric-obesity-surgical-screener
description: Screen a child aged 13+ with obesity for eligibility for bariatric surgery (laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass) using the CMAJ 2025 guideline. Trigger when a clinician asks whether a child qualifies for weight loss surgery, bariatric surgery in adolescents, sleeve gastrectomy in a teenager, or when to refer for surgical management of pediatric obesity.
---

# Pediatric Obesity: Surgical Eligibility Screener

Step-by-step checklist to determine if a child with obesity is a candidate for bariatric surgery and to guide the pre-referral workup and shared decision-making conversation.

Based on CMAJ 2025 Clinical Practice Guideline (Ball et al., doi: 10.1503/cmaj.241456).

---

## Step 1 — Basic Eligibility Criteria

| Criterion | Threshold |
|---|---|
| Age | ≥ 13 years (evidence base is exclusively ≥13) |
| Obesity severity | Severe obesity confirmed by comprehensive health assessment |
| Multidisciplinary team | Assessment by a **specialized multidisciplinary team** is required |
| Setting | Surgical centre with paediatric bariatric program |

> ⚠️ **Surgery does not require prior failure of pharmacotherapy.** Offer based on clinical severity, family preference, comorbidities, and centre availability — not as a last resort after exhausting all other options.

> ⚠️ **Centres performing bariatric surgery in adolescents are limited in Canada.** Check availability in your region before raising expectations with the family.

---

## Step 2 — Comprehensive Health Assessment (4Ms)

Assess all four domains before referral:

### Metabolic
- Insulin resistance / type 2 diabetes
- Dyslipidaemia (↑TG, ↓HDL-C, ↑LDL-C)
- Hypertension
- Non-alcoholic fatty liver disease (↑ALT)
- Obstructive sleep apnea (consider sleep study)

### Mechanical
- Musculoskeletal pain (knees, back, hips)
- Mobility limitations
- Exercise tolerance

### Mental Health *(critical — do not skip)*
- Depression and anxiety screening
- **Eating disorder screen** (binge eating disorder, atypical anorexia, purging) — **psychiatric clearance required before surgery**
- Body image and self-esteem
- Bullying history
- Caregiver mental health

### Social Milieu
- Family support and stability
- Food security
- Housing and neighbourhood safety
- Caregiver ability to support post-operative recovery and behavioural changes
- School and peer environment

---

## Step 3 — Pre-Operative Multidisciplinary Assessment

The following specialists should be involved (where available):

| Specialist | Role |
|---|---|
| Paediatric surgeon / bariatric surgeon | Surgical planning, risk stratification |
| Paediatrician / obesity medicine physician | Overall obesity management |
| Dietitian | Pre- and post-operative nutritional counselling |
| Psychologist / psychiatrist | Mental health clearance, body image, eating disorder screen |
| Social worker | Social support, family stability, access to follow-up |
| Kinesiologist (where available) | Physical activity readiness |

---

## Step 4 — Surgical Options

Both options are **conditional recommendations, low to moderate certainty.** Both require concurrent behavioural and psychological interventions.

### Laparoscopic Sleeve Gastrectomy (LSG)
- HRQoL: **very large effect** (critically important outcome)
- Weight and BMI: **substantial reduction** (very important outcome)
- Anxiety and depression: **no data available**
- Serious AEs: **higher incidence than non-surgical comparators** (important — discuss explicitly)
- Mild-moderate AEs: higher incidence (nausea, vomiting, reflux)

### Roux-en-Y Gastric Bypass (RYGB)
- HRQoL: **large effect**
- Anxiety and depression: **small effect** (beneficial)
- Weight and BMI: **substantial reduction**
- Serious AEs: **higher incidence than non-surgical comparators** (important — discuss explicitly)
- Mild-moderate AEs: higher incidence
- Higher technical complexity; nutritional monitoring more intensive

**Which to choose?** The guideline does not mandate one over the other — choice depends on surgical expertise, anatomical factors, patient preference, and centre experience.

---

## Step 5 — Shared Decision-Making Conversation

Before referral or consent, cover explicitly:

1. **Expected benefits:** Large improvements in HRQoL and substantial weight/BMI reduction; cardiometabolic improvements likely
2. **Serious AE risk:** Higher than non-surgical management — must be disclosed; includes complications requiring hospitalisation
3. **Lifestyle commitment:** Surgery requires lifelong dietary changes, vitamin supplementation, and behavioural support
4. **No guarantee of sustained weight loss** without maintained behavioural changes
5. **Alternatives:** Confirm family has considered pharmacotherapy and intensified behavioural intervention
6. **Family/caregiver support:** Post-operative period requires strong family engagement

> Involve both the child and caregivers. The child's own voice matters — especially for adolescents.

---

## Step 6 — Post-Operative Monitoring

Minimum monitoring plan after surgery:

| Timepoint | What to monitor |
|---|---|
| 1–3 months | Wound healing, GI tolerance, nutritional status, weight |
| 6 months | BMIz, cardiometabolic markers, mental health screen, eating behaviours |
| 12 months | HRQoL, nutritional deficiencies (iron, B12, vitamin D, calcium), weight trajectory |
| Ongoing | Annual metabolic screen; eating disorder vigilance; transition to adult care planning |

---

## Clinical Guardrails

- **Eating disorder is a relative contraindication** — psychiatric clearance is mandatory. Active binge eating disorder requires treatment before surgery.
- **Age < 13:** Do not refer — evidence was derived exclusively from ≥13-year-olds.
- **Technology-only interventions are insufficient** as a pre-operative behavioural program — ensure a proper multicomponent program is in place.
- **Ongoing behavioural/psychological support post-operatively is required** — surgery alone is not adequate management.
- **Transition planning:** Begin discussing adult care transition from the time of surgery, especially for 16+ year-olds.
- **Lipase inhibitors:** Not a surgical alternative — do not substitute.

---

## Source

CMAJ 2025 Clinical Practice Guideline: *Managing obesity in children.*
Ball GDC et al. CMAJ 2025 April 14; 197:E372–89. doi: [10.1503/cmaj.241456](https://doi.org/10.1503/cmaj.241456)
Updated version: June 3, 2025.