Morbidity and mortality patterns of neonates admitted to neonatal intensive care unit in tertiary care hospital, Bhopal

Kumar S 1, Ahmed M 2, Anand S 3 

1Dr. Saurabh Kumar, Assistant Professor, 2Dr. Minhajuddin Ahmed, Assistant Professor, 3Dr. Shweta Anand Professor; all authors are attached with Department of Paediatrics, CMCH, Bhopal

Address for Correspondence: Dr. Saurabh Kumar, Email- varshneysaurabh2@gmail.com

Abstract

Introduction: Neonatal period is the most vulnerable period of life when morbidity and mortality is considered. Neonatal outcome is an important indicator in obstetric and neonatal health care. In developing countries, death during the newborn period accounts for 50-70% of infant mortality. In India 1 million babies die every year. This study was conducted to know the various causative factors leading to morbidity and mortality in neonate at a tertiary care hospital. Study Design: Retrospective study. Material and method: This retrospective study was done on 279 neonates who were admitted at Chirayu Medical College and Hospital, Bhopal in neonatal intensive care unit (NICU) in the Department of Paediatrics from May 2014 to May 2015. Results: A total of 279 neonates were admitted in NICU during the study period.  A total of 244 (87%) were inborn and 35 (13%) were out-born neonates. The major cause of morbidity was neonatal sepsis (25%), prematurity (19%), neonatal jaundice (18%), birth asphyxia ( 5 %) and cardiac anomaly= 4%. The overall mortality rate was 11 %.  Most deaths were due to sepsis (28%), prematurity with RDS (18%) and birth asphyxia (9%). Conclusion: Good antenatal care, proper nutrition to pregnant women, timely referral, prevention of preterm delivery are important steps to decrease neonatal morbidity and mortality.

Key words: Neonates, Mortality & morbidity patterns, Neonatal intensive care unit

Manuscript received: 25th September 2016, Reviewed: 10th October 2016
Author Corrected; 20th October 2016, Accepted for Publication: 2nd November 2016

Introduction

Every year globally, four million neonates die in the first 4 weeks of life [1]. Neonatal period is the most vulnerable period of life due to different diseases, especially in preterm and low birth weight babies. These diseases are preventable in majority of cases [2]. In  a report published in Lancet, major direct cause of neonatal mortality were preterm birth (27%), infection (26%), asphyxia (23%), Congenital anomaly (7%),  others (7%), tetanus (7%)  and diarrhea (3%) [3].

In India, out of 25 million babies born, around one million of babies die every year.  India contributes to 25% of neonatal mortality around the world. According to national family health survey the current neonatal mortality rate is 39/1000 live birth, accounting for nearly 77% of all the infant death (57/1000) and nearly half of the under five child deaths (74/1000) [4].  Within the first month, one quarter to one-half of all the death occur within first 24 hr of life and 75% occur in the first week. First 48 hrs immediately following birth is the most crucial period for newborn survival [5]. The primary outcome of this study was to know the spectrum of diseases leading to Morbidity and Mortality Patterns of Neonates and the commonest cause of the same. The secondary outcome was to list the measures to prevent the various causes of morbidity and mortality of a neonate.

Methodology  

Material and method- This retrospective study was done on 279 neonates who were admitted at Chirayu Medical College and Hospital, Bhopal in neonatal intensive care unit (NICU) in the Department of Paediatrics from May 2014 to May 2015.

A pre-designed proforma was made. According to already designed proforma data of all admitted babies were listed out and categorized on basis of age during admission, sex, type of delivery, length of stay, birth weight, gestational age, inborn or out-born delivery, indication for admission, bacteriological profile and procedure done during hospitalization.  

Sepsis and meningitis were diagnosed on clinical grounds along with C-reactive protein (CRP), complete blood count (CBC), positive blood culture and cerebrospinal fluid (CSF) examination.

Congenital heart disease was diagnosed with Chest X-Ray and then confirmed by echocardiography. Birth Asphyxia was diagnosed clinically and hypoxic ischemic encephalopathy (HIE) by Sarnat and Sarnat Staging [6]. Diagnosis of prematurity was clinical or it was based on the WHO definition for prematurity (live born neonates delivered before 37 weeks from 1st day of last menstrual period) and using new Ballard scoring [7]. Low birth weight was defined as when birth weight was less than 2500 g.

Result

A total of 279 neonates were admitted in NICU during study period.  Of the total admission, 244 (87%) were inborn and 35 (13%) were out-born neonates. Among 279 newborn, 145 (52%) were male and 134 (48%) were female.  (79%) babies were term, (17% ) were preterm and   (2% ) were extremely preterm. Low birth weight babies were (35%) and intra uterine growth restricted babies were (10%).

The major cause of morbidity observed was neonatal sepsis  (25%), prematurity (19%), followed by birth asphyxia and cardiac anomaly. In sepsis, the most common organism grown on blood culture was Klebsiella (37%), E coli (21%) followed by Pseudomonas (13%), Acinitobacter (11.5%) and Enterobacter (8%). 5% babies were admitted with birth asphyxia. Among all birth asphyxia, HIE stage 1 was present in 60%, HIE stage 2 in   (26%)  and HIE stage 3 in (14%). Hypoglycemia, cardiac anomaly, congenital malformations, and   NEC each contributed 4% to morbidity. The common procedures performed during study were umbilical line insertion, lumbar puncture, surfactant administration and double volume exchange transfusion.  The overall mortality rate were  (11 %) and left against medical advice (LAMA) were (8%). Twenty-five neonate required mechanical ventilation, out of which 68 % improved 30 % expired and 13 % left against medical advice.  The major cause of mortality in declining order was sepsis (28%), birth asphyxia (20%) followed by prematurity with RDS (18%)  and cardiac anomaly (15%).

Table-1: Mode of admission

Admission

Number

Percentage

Inborn

245

87%

Outborn

35

13%

Table-2: Genderwise distribution

Admission

Inborn

Out-born

Male

122

25

Female

122

10

Total

244

35

Table-3:  Distribution of organisms isolated from blood

Organism

Number

Klebsiella

14 (37%)

E Coli

8 (21%)

Pseudomonas

5 (13%)

Enterobacter

4 (11.5%)

Acinitobacter

3 (8%)

Burkuldhoria

2 (5%)

Enterococcus

1 (2%)

Total

37 (13%)

Table-4: Procedure performed
        

Procedure

Number

Percentage

Umbilical  venous line

10

3.5%

Lumbar puncture

8

2.5%

Surfactant administration

6

2.4%

Chest drain

2

0.7%

Double volume exchange transfusion

 

 

Table-5: Morbidity profile

Morbidity Profile

Admission

Percentage

Sepsis with meningitis

71

25%

Neonatal jaundice

52

18%

Prematurity

54

19%

Intrauterine growth restriction

30

10%

Necrotizing enterocolitis

12

4%

Cardiac anomaly

12

4%

Congenital anomaly

12

4%

Birth asphyxia

15

5 %

Meconium aspiration syndrome

10

3.5%

Hypoglycemia

10

3.5%

Pneumothorax

2

0.7%

Table-6: Outcome of neonates

Disease

Number

Improved

expired

LAMA

Sepsis

71

55 (78%)

9 (12%)

7 (10%)

Prematurity with RDS

54

42(77%)

6 (11%)

6 (12%)

Neonatal jaundice

52

50 (96%)

0

2 (4%)

Perinatal asphyxia

15

11 (73%)

3 (20%)

1 (7%)

Cardiac anomaly

12

5 (42%)

5 (42%)

2 (16%)

Congenital anomaly

7

3 (42%)

3 (42%)

1 (16%)

Meconium aspiration syndrome

7

5 (72%)

1 (30%)

1 (13%)

Discussion  

There were total of 244 delivery (inborn), out of which 158 (64%) were born by caesarean sections (LSCS) and 36% by vaginal(NVD) and instrumental deliveries. There was  a slight male predominance (M:F ratio-1.1:1)  in our study  which was also  documented by Mani kant et al [8].  

35 % babies were low birthweight and 20 % babies were preterm. This may be due to the poor maternal health status, poor antenatal check up and the poor socio-economic status of the families. According to the UNICEF “The State of the World’s Children 2010” report, 28% neonates are born with low birth weight in India [9].

The most common morbidity for admission was sepsis (25%) followed by prematurity (19%) and perinatal asphyxia  [10]. According to national neonatal- perinatal database (NNPD) sepsis (36%) is the most common morbidity responsible for admission followed by prematurity (26.5%) and perinatal asphyxia (10%) [11]. Neonatal sepsis is an important cause of morbidity and mortality especially in VLBW and ELBW. So appropriate management of neonates with sepsis can reduce neonatal morbidity and mortality and help to achieve Millennium Development Goals.

Culture-positivity for aerobic organisms in neonates varies from 25% to 60% [10].  In this study, blood culture-positivity rate was 13%. This finding was comparable with other reports [12] .The most common organism was Klebsiella (37%), followed by  E coli (21%),  Pseudomonas (13%) which is similar to National Neonatal-Perinatal database report in which   also Klebsiella  is the predominant (29%) pathogen  [13] .

In our study sepsis (28%), prematurity (18%), cardiac anomaly (15%), perinatal asphyxia (9%) were most common cause of mortality. Study published by ICMR documented sepsis (32.8%) was the major cause of neonatal mortality [14]. Also it observed that in our study babies who require mechanical ventilation had higher mortality rate as compared to those who don’t require ventilation. This indicates that mortality depend upon stage of the disease and facilities available in NICU.

In this study overall mortality rate was 11% which is similar to study done by Jan et al [ 15].  Other  studies have reported higher mortality rates [16]  . The major cause of death in this study was sepsis. This might be due to poor antenatal care, maternal malnutrition, higher rate of preterm baby, low birth weight, infrastructure of NICU and also depends upon the care given  by the expertise of trained NICU staff.

Conclusion

In today’s scenario, sepsis is still the most common cause of mortality. Prevention of sepsis is most important step in neonatal death. Hand washing and strict infection control in NICU unit and judicious use of antibiotic can prevent sepsis in NICU.  Preventive measures as highlighted above should focus on recognition of high risk infants with prompt laboratory screening for sepsis and early instituition of empirical antibiotic based on local data. Such approaches would be safe and cost effective strategy especially in developing countries.

Good antenatal care, proper nutrition to pregnant women, timely referral, prevention of preterm delivery are important steps to decrease neonatal morbidity and mortality. In spite of newly established tertiary care hospital and shortage of staff, our hospital has good survival rate of newborn.

Funding: Nil, Conflict of interest: None initiated.
Permission from IRB: Yes

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How to cite this article?

Kumar S, Ahmed M, Anand S. Morbidity and mortality patterns of neonates admitted to neonatal intensive care unit in tertiary care hospital, Bhopal. Int. J Pediatr Res. 2016; 3(11):776-780.doi:10.17511/ijpr.2016.11.02.