Research Article
Volume 11 Issue 2 - 2022
“Comparison of Heart Rate between Preterm and Term Infants”
Mohmmad Azam Khan1* and Shahana Parveen2

1Assistant Professor (Paediatric), Abdul Malek Ukil Medical College, Noakhali, Bangladesh

2Consultant (Paediatrics), Mugda Medical College Hospital, Dhaka, Bangladesh

*Corresponding Author: Mohmmad Azam Khan, Assistant Professor (Paediatric), Abdul Malek Ukil Medical College, Noakhali, Bangladesh.
Received: January 03, 2022; Published: January 28, 2022




Abstract

Introduction: The transition from fetus to newborn is a complex physiological process. There is growing interest in the use of pulse oxymetry to assess the condition of infants immediately after birth. Heart rate, measured by counting the heart beats/minute, is a net effect of the decelerating influence of the vagal (parasympathetic) fibers, and the accelerating influence of the sympathetic fibers on the inherent rhythmicity of the heart's sinoatrial node.

Objective: To assess the Comparison of heart rate between preterm and term infants.

Material and Methods: A cross sectional study was carried out to see oxygen saturation immediately after birth and to describe changes in heart rate immediately after birth. A total 317 patients were selected according to selection criteria. In the delivery room, Department of obstetrics and gynecology, 250 Beded General Hospital, Noakhali, Bangladesh from October 2017 to March 2018.

Results: A total 317 neonate were selected according to selection criteria. Among the study subjects more than half were male (57.1%). Rests were female (42.9%). The mode of delivery was mostly LUCS (96.6%). Only 5.4% cases it was NVD. Average gestational age of the study subjects was 37.47 ± 1.16 (SD) with the range of 34 - 40. On the other hand average birth weight was 2.88±0.46 (SD) with the minimum birth weight 2.0 kg and maximum weight 4.2 kg. More than three forth of the study subjects had motion artifact (77.0%) and in 48.9% cases vernix was present. Among the study subjects high ambient light present in 3.5% cases and low perfusion present in 1.3% cases. Acrocyanosis was present in 2.5% cases. Showed that differences of heart rate in two minutes after delivery were statistically significant. The median values were more in vaginal birth from 1 to 9 minutes. But median heart rate was more in 10 minutes in caesarian birth baby. But these differences were not statisticaly significant. Illustrates the median (IQR) heart rate from one to ten min for preterm versus term births. At one to three minutes and at five minutes after birth preterm infants had significantly lower SpO2 measurements. From six to 10 minutes after birth and four minutes after birth there was no significant difference between SpO2 measurements for mode of delivery. Paired sample t test showed that average heart rate was more in 1 minute [155.06 ± 13.12 (SD)] than in 5 minute [153.43 ± 14.13 (SD)] and statistically this differences were significant (t = 2.149, p = 0.032). Pearson correlation showed high positive correlation i.e., heart rate in 5 minutes was less than heart rate in 1 minute (p = 0.000) and correlation co-efficient r = 0.509. Correlation was significant at the 0.01 level.

Conclusion: Heart rate can be low in the first minutes after birth in infants with good respiratory effort and muscle tone. The main focus of this thesis was to define the reference range for measurements of oxygen saturation and heart rate in the first minutes after birth from a large cohort of infants not receiving interventions in the delivery room. My findings add to the body of knowledge regarding the change in oxygen saturation and heart rate in the first minutes after birth.

Keywords: Heart Rate; Preterm; Term Infants; Pulse Oxymetry.

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Citation: Abul Mohmmad Azam Khan and Shahana Parveen. ““Comparison of Heart Rate between Preterm and Term Infants””. EC Paediatrics 11.2 (2022): 15-24.

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