Abstract
Background: This study aimed to evaluate the efficacy of non-nutritive sucking for analgesia
in term infants undergoing heel-stick procedures.
Methods: Randomized controlled trials and non-randomized studies based on the PICO framework
were included in the study. Review articles, commentary, pilot, and non-English articles were excluded.
Databases, such as PubMed/MEDLINE, Embase, Scopus, Web of Science, and Cochrane,
were searched until January 31st, 2021, using the keywords “Pain management”, ‘Non-nutritive
sucking”, and “Heel stick”. All studies were reviewed and retrieved by two authors independently
using a standardized form according to the inclusion criteria, and any disagreements were examined
by a third scholar. Quality assessment was evaluated by using the ROB-2 tool. Data were analyzed
using Stata version 12.0 software, and a random-effects model was used for analysis.
Results: A total of 5,629 articles were retrieved from all databases, and after the screening, finally,
6 relevant articles were included in the analysis. The tools used to control pain in infants in the articles
included PIPP, NFCS, NIPS, and NPASS. The results showed that the pain scores were significantly
lower in the NNS group compared to the control group (MD, -1.05; 95% CI, -1.53 to -0.57)
and NNS had a significant effect on oxygen saturation (O2 Sat) increasing in newborns compared to
the control group, but no significant reduction in the heart rate (HR) between two groups was
observed.
Conclusion: NNS effectively provides analgesia in full-term neonates undergoing heel-stick procedures;
however, its effects on the long-term outcomes of infants are unclear. The results showed that
NNS was effective in improving heel-stick pain in infants.
Keywords:
Pain management, heel-stick, neonatal, intensive care unit, systematic review, meta-analysis.
Graphical Abstract
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