What does increased lung markings in both lungs of a newborn mean, and what should be done?
Oct 30, 2024
Source: Cainiu Health
Dr. Zhou Xiaofeng
Introduction
Transient tachypnea of the newborn (TTN) is generally caused by accumulation of fluid in the lungs. This condition may lead to delayed or abnormal absorption of pulmonary fluid, resulting in fluid-filled lungs and increased bronchovascular markings bilaterally on imaging. It may be accompanied by symptoms such as difficulty breathing, cyanosis, and tachycardia. Patients can be treated with medications including ceftriaxone sodium for injection, furosemide tablets, and cefuroxime axetil granules, as directed by a physician.
In general, increased bilateral lung markings in newborns may be caused by postnatal pulmonary adaptation, absorption of fetal fluid, transient tachypnea of the newborn (wet lung), bronchitis, pneumonia, or other factors. Management can include general supportive measures or medication under a doctor's guidance. Specific causes are analyzed as follows:
1. Postnatal Pulmonary Adaptation
After birth, a newborn's lungs transition from a liquid-filled environment to an air-breathing state, requiring a series of physiological adjustments such as alveolar expansion and fluid absorption. This process may lead to temporary increased bilateral lung markings. This physiological increase usually resolves gradually within hours after birth and does not require specific treatment.
2. Fetal Fluid Absorption
Fetal lungs are filled with fluid in utero. After birth, this fluid must be rapidly absorbed or expelled to allow for independent breathing, which may temporarily result in increased bilateral lung markings. This process is typically completed within a few hours after delivery and does not require special intervention.
3. Transient Tachypnea of the Newborn (Wet Lung)
Transient tachypnea of the newborn is generally caused by retained lung fluid. Delayed or abnormal absorption of this fluid may lead to fluid accumulation in the lungs, appearing as increased bilateral lung markings on imaging. Symptoms may include respiratory distress, cyanosis, and tachycardia. Patients may be treated with medications such as ceftriaxone sodium for injection, penicillin sodium for injection, or cefuroxime axetil granules, as prescribed by a physician.
4. Bronchitis
Bronchitis in newborns is usually caused by infections from bacteria, fungi, or other pathogens. Infection can lead to inflammation of the bronchial walls, resulting in congestion, edema, and increased secretions, which appear as increased bilateral lung markings on imaging studies. Symptoms may include cough, sputum production, and wheezing. Under medical supervision, infants may be treated with amoxicillin granules or cefaclor granules.
5. Pneumonia
Pneumonia is typically a lung infection caused by pathogens such as bacteria or viruses. When these pathogens invade the lung tissue of a newborn, they trigger an inflammatory response and increased inflammatory secretions, leading to increased bilateral lung markings visible on imaging. Symptoms may include fever, cough, and difficulty breathing. Treatment should follow medical advice and may include ambroxol hydrochloride oral solution, acetaminophen tablets, or amoxicillin-clavulanate potassium tablets.
In daily life, parents should closely monitor the newborn’s breathing pattern and mental status, and seek prompt medical attention if any abnormalities are observed.
