Objective Pneumonia is one of the most common diseases of childhood resulting in hospital admission. It is caused by different reasons including bacteria, viruses, fungus, mycoplasma, chlamydia as well as noninfectious causes such as GER, foreign body, etc.

This study was conducted due to the critical nature of the disease and its management. Its main objective was the analysis of lab data for tests conducted on children hospitalized under diagnosis of pneumonia.

Materials and Methods 200 children were referred with fever and tachypnea to Ali Asghar Hospital and had been admitted under the diagnosis of pneumonia were studied retrospectively in a descriptive crosssectional research. 63 of patients were male, 37 were female and the average age was about 17months.

Results The results of paraclinical tests are shown in the table.

Positive blood culture was observed in 6.5 of patients and positive urine culture was seen in 4 of the patients but the organisms were not the same.

ABG abnormality Metabolic acidosis was the most common in 63 and hypoxemia in 36.9 of the patients was noticed.

Conclusion Based on the above research CBC and diff can be considered worthy. ESR and CRP are trustworthy. Renal tests, electrolyte Abg results show that conducting and evaluating these lab tests are very important and are strongly recommended in severe cases of pneumonia.