Table 2.

Pretreatment, positioning, and imaging techniques for technetium‐99m pertechnetate scan in pediatric patients. ¹⁵ , ¹⁶ , ²⁰

Pretreatment options
Cimetidine	Neonates: 10–20 mg/kg/day by mouth for 2 days Infants and older children: 20 mg/kg/day by mouth for 2 days OR IV 300 mg/100 mL 5% dextrose over 20 min, scan 1 h later (must not be given with pentagastrin)
Ranitidine	2 mg/kg by mouth OR 1 mg/kg IV (maximum 50 mg) over 20 min, scan 1 h later (must not be given with pentagastrin)
Famotidine	*0.5 mg/kg/day by mouth twice daily 48 h before scan OR 0.5 mg/kg/day IV OR *0.25 mg/kg IV (maximum 20 mg) given over 20 min, scan 1 h later (must not be given with pentagastrin)
Proton pump inhibitor	Esomeprazole 10–40 mg IV, scan 30–45 min later [25] 10 mg for patients 1–12 years‐old, <20 kg 20 mg for patients 1–12 years‐old, >20 kg 40 mg for patients >12 years‐old OR *1 mg/kg (maximum 20 mg) by mouth once daily for 48 h before scan
Pentagastrin	6 μg/kg subcutaneously before scan
Glucagon	50 μg/kg IV (maximum 1 mg), diluted to 10 mL with sterile water, infused over 2 min immediately before scan (must be given with pentagastrin) (must not be given to patient with diabetes)
Proper positioning: Patient should be supine.a Imaging field should include the stomach and the bladder
Proper Imaging technique: Anterior abdominal dynamic images up to 60 min (not to exceed 60 min)a Other views (lateral, anterior oblique, and posterior projection) after dynamic images Include postvoid images if the patient does not have a urinary cathetera Consider repeating the study if negative/equivocal results and continued high suspicion for Meckel's diverticulum Consider SPECT imaging if negative/equivocal results and continued high suspicion for Meckel's diverticulum

Abbreviations: IV, intravenous; SPECT, single‐photon emission computerized tomography.

^a Included in Children's Health Meckel scan protocol.