Effect of umbilical cord milking in term and near term infants: randomized control trial

Comparison of Three Methods of Umbilical Cord Management in Late Preterm and Term Newborns on Hemoglobin and Ferritin Levels at Six Weeks of Age: A Randomized Controlled Trial

BACKGROUND

Umbilical cord milking (UCM) and delayed cord clamping (DCC) are strategies that improve the hemodynamic condition of the newborn and also increase the storage of iron. This study aimed to compare the effects of DCC with or without milking in late preterm and term neonates at different time intervals after birth (60, 120, and 180 seconds) on hematological and hemodynamic parameters in neonates at six weeks of age.

MATERIALS AND METHODS

In this double-arm, parallel-group, triple-blind, and active-controlled trial, all 150 eligible neonates were randomized with allocation concealment into three groups: Group A (DCC with UCM at 60 seconds), Group B (DCC with UCM at 120 seconds), and Group C (only DCC for 180 seconds). Hemodynamic parameters were recorded and compared during the first 48 hours, and hematological parameters were compared at six weeks of age.

RESULTS

At six weeks, a significant difference in hemoglobin levels was noted between Groups A, B, and C (p<0.001). The difference in serum ferritin values at six weeks was also statistically significant in comparisons across all three groups (p=0.003). Regarding secondary outcomes examined, hemodynamic parameters and the incidence of neonatal hyperbilirubinemia were found to be comparable at 48 hours after birth.

CONCLUSION

DCC followed by UCM at 120 seconds and DCC till 180 seconds proves superior to DCC with UCM at 60 seconds in preserving elevated hemoglobin levels and iron stores in neonates at six weeks of age. DCC for 180 seconds yielded comparable results, followed by UCM at 120 seconds. All three methods are considered safe and effective without compromising the neonate's hemodynamics.

Comparison of Three Different Cord Clamping Techniques Regarding Oxidative-Antioxidative Capacity in Term Newborns

OBJECTIVE

 As newborns are exposed to oxidative stress during delivery, cord clamping techniques play significant role on antioxidant status. In this study, we aimed to show the relationship between early cord clamping (ECC), delayed cord clamping (DCC), and cut-umbilical cord milking (C-UCM) techniques with total oxidant capacity (TOC), total antioxidant capacity (TAC), and peroxynitrite levels.

STUDY DESIGN

 Sixty-nine term infants were selected with Apgar's score of 7 and above in the 1 minute and 5 minutes. The mothers of all infants had uncomplicated pregnancy, had no congenital anomaly, and delivered by cesarean section. Newborns were randomized to one of three groups: ECC (n: 23), DCC (n: 23), or C-UCM (n: 23). After all newborn babies were taken under radiant heater, blood samples were collected from the UC. The plasma samples were then frozen and stored at -80°C until analysis and TOC, TAC, and peroxynitrite levels were studied.

RESULTS

 The ages of the mothers participating in the study were between 17 and 42 years, with an average of 29.14 ± 6.28. Thirty (43.5%) of the babies were girls and 39 (56.5%) were boys. The 5-minute Apgar's score of the babies in ECC group was significantly lower than the babies in DCC and cut cord milking group (p = 0.034; p = 0.034; p < 0.05). The TOC, oxidative stress index (OSI), and peroxynitrite measurements of three groups did not differ statistically. The TAC value of the C-UCM group was significantly higher than the patients with the ECC and DCC groups (p = 0.002; p = 0.019; p < 0.05).

CONCLUSION

 C-UCM and DCC would be feasible methods by increasing antioxidant status and providing protective effect on the future health of the term newborns.

KEY POINT

· Cord clamping techniques play significant role on antioxidant status of the newborn babies.. · C-UCM and DCC are feasible methods for term newborns.. · Cord clamping methods may play a protective effect on the future health of term newborns..

Delayed cord clamping vs cord milking in elective cesarean delivery at term: a randomized controlled trial

BACKGROUND

Delayed cord clamping has significant beneficial effects on the neonate and its transition to extrauterine life and, therefore, is common practice at vaginal births in the Netherlands. In 2015, 16% of neonates were born via cesarean delivery; moreover, in 81% of these cases, the umbilical cord was clamped and cut immediately. Neonatal benefits of delayed cord clamping are an increased circulating volume of 25 to 30 mL/kg, leading to a higher preload of both the right and left ventricles during the transition from umbilical circulation to pulmonary circulation, thus maintaining a stable left ventricle output, and to higher neonatal hemoglobin and hematocrit levels 24 to 48 hours after birth. Currently, little is known about whether the abovementioned neonatal benefits of delayed cord clamping could apply to neonates delivered by cesarean delivery. In these cases, possible negative effects on neonatal outcomes (ie, neonatal hypothermia, lower Apgar scores, and hyperbilirubinemia) and maternal outcomes (ie, increased maternal blood loss and higher postoperative infection rate) should also be taken into consideration.

OBJECTIVE

This study aimed to determine whether clamping the umbilical cord after 2 minutes is superior to cord milking during elective cesarean deliveries at term, taking both short- and long-term neonatal and maternal outcomes into consideration, and to determine whether cord milking could be an appropriate alternative to delayed cord clamping.

STUDY DESIGN

A randomized controlled trial was conducted in a large secondary care center in the Netherlands (Amphia Hospital in Breda) from October 2020 to April 2022. A total of 115 patients who underwent an elective cesarean delivery between 37 0/7 and 41 6/7 weeks of gestation were included. The primary outcomes were neonatal hemoglobin and hematocrit levels at 48 hours after birth. The secondary outcomes were divided into neonatal and maternal outcomes.

RESULTS

After randomization, 58 participants were treated with cord milking, and 57 participants were treated with delayed cord clamping. There was no significant difference in demographic characteristics between both groups. There was no significant difference in the primary outcomes, with a mean hemoglobin level 48 hours after birth of 12.1 mmol/L in the delayed cord clamping group and 12.2 mmol/L in the cord milking group (P=.80). Regarding our secondary outcomes, there was no significant difference regarding Apgar score, neonatal body temperature, maternal blood loss, and postoperative infection rate between our intervention groups.

CONCLUSION

Hemoglobin and hematocrit levels at 48 hours after birth showed no significant difference when comparing delayed cord clamping with cord milking. Delayed cord clamping did not lead to increased maternal blood loss or postoperative infections compared with a method with a much shorter timeframe between delivery and clamping of the umbilical cord, namely, cord milking. In addition, delayed cord clamping did not lead to a lower Apgar score or neonatal temperature compared with cord milking. Our research suggests that delayed cord clamping can be safely performed during elective cesarean deliveries at term. If intraoperative circumstances do not allow for delayed cord clamping, cord milking can be an appropriate alternative for the neonate at term.

Cut umbilical cord milking (C-UCM) as a mode of placental transfusion in non-vigorous preterm neonates: a randomized controlled trial

Routine practice of delayed cord clamping (DCC) is the standard of care in vigorous neonates. However there is no consensus on the recommended approach to placental transfusion in non-vigorous neonates. In this trial, we tried to examine the effect of cut umbilical cord milking (C-UCM) as compared to early cord clamping (ECC) on hematological and clinical hemodynamic parameters in non-vigorous preterm neonates of 30-35 weeks gestation. The primary outcome assessed was venous hematocrit (Hct) at 48 (± 4) hours of postnatal age. The important secondary outcomes assessed were serum ferritin at 6 weeks of age, mean blood pressure in the initial transitional phase along with important neonatal morbidities and potential complications. In this single centre randomized controlled trial, 134 non vigorous neonates of 30-35 weeks gestation were allocated in a 1:1 ratio to either C-UCM (n = 67) or ECC (n = 67). For statistical analysis, unpaired Student t and Chi square or Fisher's exact test were used. The mean Hct at 48 h was higher in the C-UCM group as compared to the control group, 50.24(4.200) vs 46.16(2.957), p < .0001. Also significantly higher was the mean Hct at 12 h, 6 weeks and mean serum ferritin at 6 weeks of age in the milked group (p < .0001). Mean blood pressure at 1 h and 6 h was also significantly higher in the milked arm. Need for transfusion and inotropes was less in the milked group but not statistically significant. No significant difference in potential complications was observed between the groups.    Conclusion: C-UCM stabilizes initial blood pressure and results in higher hematocrit and improved iron stores. It can be an alternative to DCC in non-vigorous preterm neonates of 30-35 weeks' gestation. Further large multicentric studies are needed to fully establish its efficacy and safety.   Trial registration: CTRI/2021/12/038606; registration date December 14, 2021. What is Known: • DCC is the routinely recommended method of placental transfusion for vigorous neonates but no consensus exist for neonates requiring resuscitation at birth. • C-UCM is easier to perform in non-vigorous neonates but there is paucity of studies in the preterm population. What is New: • C-UCM is effective as well as safe in non-vigorous preterm neonates of 30-35 weeks gestational age. • C-UCM holds promise as an alternative to DCC, especially in resource limited settings and in situations where the later is not feasible.

Hemodynamic Changes with Umbilical Cord Milking in Nonvigorous Newborns: A Randomized Cluster Cross-over Trial

OBJECTIVE

To assess the hemodynamic safety and efficacy of umbilical cord milking (UCM) compared with early cord clamping (ECC) in nonvigorous newborn infants enrolled in a large multicenter randomized cluster-crossover trial.

STUDY DESIGN

Two hundred twenty-seven nonvigorous term or near-term infants who were enrolled in the parent UCM vs ECC trial consented for this substudy. An echocardiogram was performed at 12 ± 6 hours of age by ultrasound technicians blinded to randomization. The primary outcome was left ventricular output (LVO). Prespecified secondary outcomes included measured superior vena cava (SVC) flow, right ventricular output (RVO), peak systolic strain, and peak systolic velocity by tissue Doppler examination of the RV lateral wall and the interventricular septum.

RESULTS

Nonvigorous infants receiving UCM had increased hemodynamic echocardiographic parameters as measured by higher LVO (225 ± 64 vs 187 ± 52 mL/kg/min; P < .001), RVO (284 ± 88 vs 222 ± 96 mL/kg/min; P < .001), and SVC flow (100 ± 36 vs 86 ± 40 mL/kg/min; P < .001) compared with the ECC group. Peak systolic strain was lower (-17 ± 3 vs -22 ± 3%; P < .001), but there was no difference in peak tissue Doppler flow (0.06 m/s [IQR, 0.05-0.07 m/s] vs 0.06 m/s [IQR, 0.05-0.08 m/s]).

CONCLUSIONS

UCM increased cardiac output (as measured by LVO) compared with ECC in nonvigorous newborns. Overall increases in measures of cerebral and pulmonary blood flow (as measured by SVC and RVO flow, respectively) may explain improved outcomes associated with UCM (less cardiorespiratory support at birth and fewer cases of moderate-to-severe hypoxic ischemic encephalopathy) among nonvigorous newborn infants.

Umbilical cord milking in nonvigorous infants: a cluster-randomized crossover trial

BACKGROUND

Delayed cord clamping and umbilical cord milking provide placental transfusion to vigorous newborns. Delayed cord clamping in nonvigorous newborns may not be provided owing to a perceived need for immediate resuscitation. Umbilical cord milking is an alternative, as it can be performed more quickly than delayed cord clamping and may confer similar benefits.

OBJECTIVE

We hypothesized that umbilical cord milking would reduce admission to the neonatal intensive care unit compared with early cord clamping in nonvigorous newborns born between 35 and 42 weeks' gestation.

STUDY DESIGN

This was a pragmatic cluster-randomized crossover trial of infants born at 35 to 42 weeks' gestation in 10 medical centers in 3 countries between January 2019 and May 2021. The centers were randomized to umbilical cord milking or early cord clamping for approximately 1 year and then crossed over for an additional year or until the required number of consented subjects was reached. Waiver of consent as obtained in all centers to implement the intervention. Infants were eligible if nonvigorous at birth (poor tone, pale color, or lack of breathing in the first 15 seconds after birth) and were assigned to umbilical cord milking or early cord clamping according to their birth hospital randomization assignment. The baseline characteristics and outcomes were collected following deferred informed consent. The primary outcome was admission to the neonatal intensive care unit for predefined criteria. The main safety outcome was hypoxic-ischemic encephalopathy. Data were analyzed by the intention-to-treat concept.

RESULTS

Among 16,234 screened newborns, 1780 were eligible (905 umbilical cord milking, 875 early cord clamping), and 1730 had primary outcome data for analysis (97% of eligible; 872 umbilical cord milking, 858 early cord clamping) either via informed consent (606 umbilical cord milking, 601 early cord clamping) or waiver of informed consent (266 umbilical cord milking, 257 early cord clamping). The difference in the frequency of neonatal intensive care unit admission using predefined criteria between the umbilical cord milking (23%) and early cord clamping (28%) groups did not reach statistical significance (modeled odds ratio, 0.69; 95% confidence interval, 0.41-1.14). Umbilical cord milking was associated with predefined secondary outcomes, including higher hemoglobin (modeled mean difference between umbilical cord milking and early cord clamping groups 0.68 g/dL, 95% confidence interval, 0.31-1.05), lower odds of abnormal 1-minute Apgar scores (Apgar ≤3, 30% vs 34%, crude odds ratio, 0.72; 95% confidence interval, 0.56-0.92); cardiorespiratory support at delivery (61% vs 71%, modeled odds ratio, 0.57; 95% confidence interval, 0.33-0.99), and therapeutic hypothermia (3% vs 4%, crude odds ratio, 0.57; 95% confidence interval, 0.33-0.99). Moderate-to-severe hypoxic-ischemic encephalopathy was significantly less common with umbilical cord milking (1% vs 3%, crude odds ratio, 0.48; 95% confidence interval, 0.24-0.96). No significant differences were observed for normal saline bolus, phototherapy, abnormal 5-minute Apgar scores (Apgar ≤6, 15.7% vs 18.8%, crude odds ratio, 0.81; 95% confidence interval, 0.62-1.06), or a serious adverse event composite of death before discharge.

CONCLUSION

Among nonvigorous infants born at 35 to 42 weeks' gestation, umbilical cord milking did not reduce neonatal intensive care unit admission for predefined criteria. However, infants in the umbilical cord milking arm had higher hemoglobin, received less delivery room cardiorespiratory support, had a lower incidence of moderate-to-severe hypoxic-ischemic encephalopathy, and received less therapeutic hypothermia. These data may provide the first randomized controlled trial evidence that umbilical cord milking in nonvigorous infants is feasible, safe and, superior to early cord clamping.

Prevention of postpartum hemorrhage in vaginal deliveries

Identification of patients at risk for postpartum hemorrhage (PPH) may allow for prompt diagnosis and intervention. Individual risk factors, risk assessment tools and prediction models have been used for determining a patient's risk of PPH. Measures for the prevention of PPH include identification and management of iron deficiency anemia, unit readiness and preparedness through performing regular simulations and having a PPH cart or medication kit readily available, prophylactic uterotonic - carbetocin alone or dual agents such as oxytocin and misoprostol or oxytocin and methylergometrine or antifibrinolytic (oxytocin and tranexamic acid) use in the third stage of labor immediately after fetal head delivery, and controlled cord traction.

Delayed cord clamping versus cord milking in vigorous neonates ≥35 weeks gestation born via cesarean: A Randomized clinical trial

BACKGROUND

Delayed cord clamping (DCC) is the recommended strategy in neonates not requiring resuscitation, but umbilical cord milking (UCM) can also be used in term babies. DCC has been found to offer advantages more than just placental transfusion.

OBJECTIVE

To compare the neonatal outcomes of DCC and UCM at birth in vigorous neonates ≥35 weeks born via cesarean section.

METHODS

We included all vigorous neonates born ≥35 weeks of gestation through the cesarean section in this open-label randomized controlled trial. They were randomized into Group-A (DCC-cord was clamped 60 s after birth) or Group B(UCM). For neonates in Group B, the intact cord was milked at 25 cm from the stump 3 times towards the neonate and then clamped. The primary outcome was hematocrit at 72 h of life. Secondary outcomes were serum ferritin between 6 and 10 weeks of life, serum bilirubin at 72 h of life, need and duration of phototherapy, respiratory distress, hypoglycemia, hypotension, and sepsis.

RESULTS

Baseline characteristics were similar in both the groups. The mean hematocrit at 72 h was more in the DCC group compared to the UCM group [(55.60±4.50) vs (53.89±4.44), MD (95% CI) = 1.71 (0.26, 3.16); p = 0.021]. There was no significant difference in median serum ferritin between the groups [102.88(84.67-173.24) vs 137.93(85.15-230.40); p = 0.173]. There was no significant difference in clinical outcomes.

CONCLUSION

In neonates born via cesarean section, DCC resulted in improved hematocrit levels by 72 hours compared to UCM. DCC results in better placental transfusion.

Umbilical cord milking-benefits and risks

The most common methods for providing additional placental blood to a newborn are delayed cord clamping (DCC) and umbilical cord milking (UCM). However, DCC carries the potential risk of hypothermia due to extended exposure to the cold environment in the operating room or delivery room, as well as a delay in performing resuscitation. As an alternative, umbilical cord milking (UCM) and delayed cord clamping with resuscitation (DCC-R) have been studied, as they allow for immediate resuscitation after birth. Given the relative ease of performing UCM compared to DCC-R, UCM is being strongly considered as a practical option in non-vigorous term and near-term neonates, as well as preterm neonates requiring immediate respiratory support. However, the safety profile of UCM, particularly in premature newborns, remains a concern. This review will highlight the currently known benefits and risks of umbilical cord milking and explore ongoing studies.

Lung aeration reduces blood pressure surges caused by umbilical cord milking in preterm lambs

Background

Umbilical cord milking (UCM) at birth causes surges in arterial blood pressure and blood flow to the brain, which may explain the high risk of intraventricular haemorrhage (IVH) in extremely preterm infants receiving UCM. This high risk of IVH has not been reported in older infants.

Objective

We hypothesized that lung aeration before UCM, reduces the surge in blood pressure and blood flow induced by UCM.

Methods

At 126 days' gestation, fetal lambs (N = 8) were exteriorised, intubated and instrumented to measure umbilical, pulmonary, cerebral blood flows, and arterial pressures. Prior to ventilation onset, the umbilical cord was briefly (2-3 s) occluded (8 times), which was followed by 8 consecutive UCMs when all physiological parameters had returned to baseline. Lambs were then ventilated. After diastolic pulmonary blood flow markedly increased in response to ventilation, the lambs received a further 8 consecutive UCMs. Ovine umbilical cord is shorter than the human umbilical cord, with ∼10 cm available for UCMs. Therefore, 8 UCMs/occlusions were done to match the volume reported in the human studies. Umbilical cord clamping occurred after the final milk.

Results

Both umbilical cord occlusions and UCM caused significant increases in carotid arterial blood flow and pressure. However, the increases in systolic and mean arterial blood pressure (10 ± 3 mmHg vs. 3 ± 2 mmHg, p = 0.01 and 10 ± 4 mmHg vs. 6 ± 2 mmHg, p = 0.048, respectively) and carotid artery blood flow (17 ± 6 ml/min vs. 10 ± 6 ml/min, p = 0.02) were significantly greater when UCM occurred before ventilation onset compared with UCM after ventilation.

Conclusions

UCM after ventilation onset significantly reduces the increases in carotid blood flow and blood pressure caused by UCM.

The hematological impact of umbilical cord milking versus delayed cord clamping in premature neonates: a randomized controlled trial

BACKGROUND

The hematological impact of umbilical cord milking (UCM) was compared to that of delayed cord clamping (DCC) as a faster placental transfusion technique for preterm neonates (between 24 and 34 + 6 weeks gestation). A comparison of important neonatal morbidities was also made.

METHODS

This was an open-label randomized trial conducted from June 8, 2017, to April 22, 2019. Two hundred patients with preterm deliveries (24 and 34 + 6 weeks gestation) were assigned to the DCC or UCM group at random at a ratio of 1:1. The study power was 80% for a difference in the hematocrit value of 3% and Hb value of one gram, and an alpha error of 0.05.

RESULTS

The following variables were analyzed in the comparison of UCM vs. DCC: first draw hemoglobin: 17.0 ± 1.9 vs. 16.8 ± 1.8 gm/dl (95% CI -0.75-0.29, P 0.383); first draw hematocrit: 55.6 ± 6.4 vs. 55.2 ± 6.4% (95% CI -2.18-1.38, P 0.659); peak hematocrit: 56.9 ± 6.4 vs. 56.3 ± 6.7% (95% CI -2.41-1.26, P 0.537); the need for respiratory assistance (47% vs. 30%, P 0.020), inotropes (16% vs. 6%, P 0.040), and blood transfusion (26% vs. 12%, P 0.018); and the occurrence of intraventricular hemorrhage (9% vs. 5%, P 0.407), necrotizing enterocolitis (6% vs. 2%, P 0.279), sepsis (25% vs. 15%, P 0.111), and neonatal death (13% vs. 4%, P 0.40).

CONCLUSION

UCM facilitated a rapid transfer of placental blood equivalent to that of DCC for premature neonates. However, it resulted in increased rates of interventions and morbidities, especially in extremely preterm neonates.

TRIAL REGISTRATION

The clinical trial was registered on May 10, 2017, with registration number (NCT03147846).

Umbilical Cord Management in Late Preterm and Term Infants: A Randomized Controlled Trial

OBJECTIVE

The study aimed to compare the effects of three different methods of umbilical cord management on hematological parameters in term and late-preterm infants.

STUDY DESIGN

A randomized controlled trial comparing intact-umbilical cord milking (I-UCM) with cut-umbilical cord milking (C-UCM) and immediate cord clamping (ICC) in neonates born >35 weeks' gestation.

RESULTS

A total of 587 infants were evaluated. Of these, 197 were assigned to I-UCM, 190 to C-UCM, and 200 to ICC. Mean hemoglobin and hematocrit levels at 48 hours of age were higher in I-UCM group compared with the ICC group (p = 0.002 and p = 0.010, respectively).

CONCLUSION

These findings suggest that I-UCM is more beneficial choice. Further trials are needed to assess the various long- and short-term effects of different cord milking methods.

KEY POINTS

· This is the first study comparing these three methods (I-UCM, C-UCM, and ICC) concurrently.. · I-UCM is more beneficial choice.. · Although the terms I-UCM and C-UCM are often used interchangeably, these are different procedures..

Cardiopulmonary Resuscitation with an Intact Umbilical Cord

The body of literature supporting different umbilical management strategies has increased over the past decade as the role of cord management in neonatal transition is realized. Multiple international governing bodies endorse delayed cord clamping, and this practice is now widely accepted by obstetricians and neonatologists. Although term and preterm neonates benefit in some ways from delayed cord clamping, additional research on variations in this practice, including resuscitation with an intact cord, aim to find the optimal cord management practice that reduces mortality and major morbidities.

Perinatal care for the extremely preterm infant

Being born preterm (prior to 37 weeks of completed gestation) is a leading cause of childhood death up to five years of age, and is responsible for the demise of around one million preterm infants each year. Rates of prematurity, which range from approximately 5 to 18% of births, are increasing in most countries. Babies born extremely preterm (less than 28 weeks' gestation) and in particular, in the periviable (20^0/7-25^6/7 weeks) period, are at the highest risk of death, or the development of long-term disabilities. The perinatal care of extremely preterm infants and their mothers raises a number of clinical, technical, and ethical challenges. Focusing on 'micropremmies', or those born in the periviable period, this paper provides an update regarding the aetiology and impacts of periviable preterm birth, advances in the antenatal, intrapartum, and acute post-natal management of these infants, and a review of counselling/support approaches for engaging with the infant's family. It concludes with an overview of emerging technology that may assist in improving outcomes for this at-risk population.

2021 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations: Summary From the Basic Life Support; Advanced Life Support; Neonatal Life Support; Education, Implementation, and Teams; First Aid Task Forces; and the COVID-19 Working Group

The International Liaison Committee on Resuscitation initiated a continuous review of new, peer-reviewed published cardiopulmonary resuscitation science. This is the fifth annual summary of the International Liaison Committee on Resuscitation International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations; a more comprehensive review was done in 2020. This latest summary addresses the most recently published resuscitation evidence reviewed by International Liaison Committee on Resuscitation task force science experts. Topics covered by systematic reviews in this summary include resuscitation topics of video-based dispatch systems; head-up cardiopulmonary resuscitation; early coronary angiography after return of spontaneous circulation; cardiopulmonary resuscitation in the prone patient; cord management at birth for preterm and term infants; devices for administering positive-pressure ventilation at birth; family presence during neonatal resuscitation; self-directed, digitally based basic life support education and training in adults and children; coronavirus disease 2019 infection risk to rescuers from patients in cardiac arrest; and first aid topics, including cooling with water for thermal burns, oral rehydration for exertional dehydration, pediatric tourniquet use, and methods of tick removal. Members from 6 International Liaison Committee on Resuscitation task forces have assessed, discussed, and debated the quality of the evidence, according to the Grading of Recommendations Assessment, Development, and Evaluation criteria, and their statements include consensus treatment recommendations or good practice statements. Insights into the deliberations of the task forces are provided in Justification and Evidence-to-Decision Framework Highlights sections. In addition, the task forces listed priority knowledge gaps for further research.

2021 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations

The International Liaison Committee on Resuscitation initiated a continuous review of new, peer-reviewed published cardiopulmonary resuscitation science. This is the fifth annual summary of the International Liaison Committee on Resuscitation International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations; a more comprehensive review was done in 2020. This latest summary addresses the most recently published resuscitation evidence reviewed by International Liaison Committee on Resuscitation task force science experts. Topics covered by systematic reviews in this summary include resuscitation topics of video-based dispatch systems; head-up cardiopulmonary resuscitation; early coronary angiography after return of spontaneous circulation; cardiopulmonary resuscitation in the prone patient; cord management at birth for preterm and term infants; devices for administering positive-pressure ventilation at birth; family presence during neonatal resuscitation; self-directed, digitally based basic life support education and training in adults and children; coronavirus disease 2019 infection risk to rescuers from patients in cardiac arrest; and first aid topics, including cooling with water for thermal burns, oral rehydration for exertional dehydration, pediatric tourniquet use, and methods of tick removal. Members from 6 International Liaison Committee on Resuscitation task forces have assessed, discussed, and debated the quality of the evidence, according to the Grading of Recommendations Assessment, Development, and Evaluation criteria, and their statements include consensus treatment recommendations or good practice statements. Insights into the deliberations of the task forces are provided in Justification and Evidence-to-Decision Framework Highlights sections. In addition, the task forces listed priority knowledge gaps for further research.

A 20-cm cut umbilical cord milking may not benefit the preterm infants < 30 week's gestation: A randomized clinical trial

BACKGROUND/PURPOSE

To evaluate whether a shorter length (20 cm) of C-UCM has potential benefits, compared to immediate cord clamping (ICC), in very preterm babies.

METHODS

Inborn preterm infants less than 30 weeks of gestational age (GA) were randomly assigned to the 20-cm C-UMC and ICC groups. The primary outcome was the need for packed red blood cell (pRBC) transfusion before the 21st day of life. The secondary outcomes were short- and long-term outcomes related to premature birth.

RESULTS

Seventy-six neonates were randomized to the two groups. GA were 27.2 ± 1.8 and 27.5 ± 1.7 weeks (p = 0.389) and birth weights were 987 ± 269 and 1023 ± 313 g (p = 0.601) in the 20-cm C-UCM and ICC groups, respectively. There was no significant difference between the groups in terms of the need for pRBC transfusion before the 21st day of life (59.4% versus 71.8%, adjusted odds ratio [aOR] 0.311, 95% confidence interval [CI] 0.090-1.079). An increased prevalence of late-onset sepsis was observed in the 20-cm C-UCM group compared to the ICC group (21.6% versus 5.1%, aOR 5.434, 95% CI 1.033-23.580). The mortality rates were 13.5% and 2.6% in the 20-cm C-UCM and ICC groups, respectively (aOR 5.339, 95% CI 0.563-50.626). The neurodevelopmental outcomes at 2 years of corrected age between the groups were also not statistically significant.

CONCLUSION

A 20-cm C-UCM showed no effect on reducing the incidence of pRBC transfusion in preterm babies with GA less than 30 weeks compared with ICC in this small-scale randomized controlled trial.

Umbilical cord milking versus delayed cord clamping in term infants: a systematic review and meta-analysis

OBJECTIVE

Delayed cord clamping (DCC) is recommended for healthy term infants. However, the effectiveness of umbilical cord milking (UCM) in term infants remains unknown. The study aimed to compare the effects of UCM versus DCC on term infants.

STUDY DESIGN

A systematic review and meta-analysis were conducted which included individual and clustered RCTs comparing UCM with DCC for infants born at ≥37 weeks of gestation.

RESULTS

Three trials (650 term infants) were included. Compared with DCC, UCM was associated with higher hemoglobin levels at 6 weeks after birth [infants, 621; mean difference, 0.17; 95% confidence interval, 0.05-0.29] and had no statistical differences in hemoglobin levels at birth, serum bilirubin levels at 48 h after birth, or hematocrit levels at 48 h after birth.

CONCLUSION

This study suggested that UCM might be as beneficial as DCC in term infants, however, further RCTs are required to accurately assess the outcomes.

Delayed cord clamping: Time for physiologic implementation

Delayed cord clamping has been shown to be beneficial in both preterm and term babies. Practice guidelines have not been consistent between centers and the practice of delayed cord clamping has not been standardized. The concept of physiologic-based cord clamping emerged into practice as well. Cord milking has different physiological effect and might be harmful in preterm babies.

Effect of Umbilical Cord Milking on Maternal and Neonatal Outcomes in a Tertiary Care Hospital in South India: A Randomized Control Trial

Background and Aim

Umbilical cord milking (UCM) has been theorized to increase placental blood transfusion then again, the optimal method of cord clamping at birth is still contested. We aimed to analyse the effects of UCM on the neonatal haematological parameters at 72 h and 6 weeks of age and its association with any adverse effects.

Materials and Methods

In this randomized control trial, mothers ≥ 34 weeks were randomized into two arms. Under the intervention group, the cord was milked three times before clamping and cutting whereas the controls had the cord clamped and cut without milking. Haemoglobin and haematocrit levels were measured at 72 h. and at 6 weeks.

Results

A total of 170 mothers were enrolled with 85 subjects in each arm. Baseline characteristics were comparable. In the intervention arm, the mean haemoglobin [18.1 (2.4) g/dL] and haematocrit [54 (7) %] were significantly higher as compared to the control arm [16.4 (2.1) g/dL and 48 (6) %], at 72 h of age. There was also significant increase in the mean haemoglobin [11.6 (1.3) g/dL] and haematocrit [34 (4) %] compared to the controls [10.1 (1.1) g/dL and 30 (3) %], at 6 weeks. No statistical difference was found in the incidence of PPH and duration of third stage. There was no significant rise in hyperbilirubinaemia, phototherapy requirement and polycythaemia among neonates in the intervention group.

Conclusion

Umbilical cord milking is a sound practical approach to raise the haemoglobin and haematocrit levels up to 6 weeks thereby decreasing the proportion of anaemic infants.

A randomized controlled clinical trial on peripartum effects of delayed versus immediate umbilical cord clamping on term newborns

OBJECTIVES

To compare the hemoglobin and serum bilirubin concentration of term newborn following delayed and immediate umbilical cord clamping.

METHODS

A randomized controlled trial of eligible parturients with singleton pregnancy delivered between July 1, 2019 and September 30, 2020 were randomly assigned (1:1 ratio) to either delayed clamping of umbilical cord (60 s after delivery) or immediate clamping (0-15 s) was done. The primary outcome measures included hemoglobin and bilirubin levels of the newborn measured at birth and 48 h of life. Intention-to-treat principle was applied to analysis (www.pactr.org: PACTR201906668876480).

RESULTS

One hundred and two newborns were randomized into each group and none was lost to follow-up. Participants in both groups had similar socio-demographic and clinical characteristics. At 0 h of birth, cord blood hemoglobin concentration and total bilirubin values were not significantly different between the two groups (p > 0.05). At 48 h of birth, mean hemoglobin concentration was significantly higher in delayed clamping group than immediate clamping group (16.51 ± 1.71 g/dl vs 15.16 ± 2.27 g/dl; p < 0.001) but total mean bilirubin concentration was not significantly different (3.88 ± 1.54 mg/dl vs 3.71 ± 1.20 mg/dl; p = 0.380). There was no significant difference in postpartum hemorrhage (p = 0.653), neonatal jaundice (p = 0.856), and need for phototherapy (p = 0.561) while respiratory symptoms, polycythemia and anemia were not reported.

CONCLUSION

Delayed cord clamping at childbirth is more advantageous for term infants in terms of more hemoglobin concentration compared to traditional immediate cord clamping. The maternal and perinatal complications were either not significantly different or absent.

European Resuscitation Council Guidelines 2021: Newborn resuscitation and support of transition of infants at birth

The European Resuscitation Council has produced these newborn life support guidelines, which are based on the International Liaison Committee on Resuscitation (ILCOR) 2020 Consensus on Science and Treatment Recommendations (CoSTR) for Neonatal Life Support. The guidelines cover the management of the term and preterm infant. The topics covered include an algorithm to aid a logical approach to resuscitation of the newborn, factors before delivery, training and education, thermal control, management of the umbilical cord after birth, initial assessment and categorisation of the newborn infant, airway and breathing and circulation support, communication with parents, considerations when withholding and discontinuing support.

A 3-armed multicenter randomized controlled trial: Placental Transfusion in Very Preterm Infants (PT-VPI)

Preterm infants constitute an important proportion of neonatal deaths and various complications, and very preterm infants (VPI) are more likely to develop severe complications, such as intraventricular hemorrhage (IVH), anemia, and sepsis. It has been confirmed that placental transfusion can supplement blood volume in infants and reduce preterm-associated complications, which is further conducive to the development of the nervous system and a better long-term prognosis. Based on these advantages, placental transfusion has been widely used in VPI. There are three main types of placental transfusion: delayed cord clamping (DCC), intact umbilical cord milking (I-UCM), and cut umbilical cord milking (C-UCM). However, the optimal method for PT-VPI remains controversial, and it is urgent to identify the best method of placental transfusion. We plan to fully evaluate the safety and effectiveness of these three placental transfusion methods in VPI in a 3-arm multicenter randomized controlled trial: Placental Transfusion in Very Preterm Infants (PT-VPI). Trial registration: chictr.org.cn, number ChiCTR2000030953.

Umbilical Cord Management at Term and Late Preterm Birth: A Meta-analysis

CONTEXT

The International Liaison Committee on Resuscitation prioritized scientific review of umbilical cord management at term and late preterm birth.

OBJECTIVE

To assess effects of umbilical cord management strategies (clamping timing and cord milking) in infants ≥34 weeks' gestational age.

DATA SOURCES

Cochrane Central Register of Controlled Trials, Medline, PubMed, Embase, Cumulative Index to Nursing and Allied Health Literature, and trial registries searched July 2019.

STUDY SELECTION

Two authors independently assessed eligibility of randomized controlled trials.

DATA EXTRACTION

Two authors independently extracted data and assessed evidence certainty (Grading of Recommendations Assessment, Development and Evaluations).

RESULTS

We identified 46 studies (9159 women and their infants) investigating 7 comparisons. Compared with early cord clamping (ECC) <30 seconds, delayed cord clamping (DCC) ≥30 seconds (33 studies), intact-cord milking (1 study), and cut-cord milking (2 studies) probably improve hematologic measures but may not affect survival without neurodisability, anemia in early infancy, or maternal postpartum hemorrhage. No differences in major neonatal morbidities are seen in studies comparing methods of optimizing placental transfusion (DCC versus cut-cord milking [3 studies], longer delays in clamping [7 studies], or physiologic parameters [3 studies]). Strategies that promote increased placental transfusion may be associated with greater phototherapy use. Evidence for all outcomes was low or very low certainty.

LIMITATIONS

Incompleteness and low certainty of findings limit applicability.

CONCLUSIONS

Compared with ECC, DCC or cord milking increases hemoglobin and hematocrit immediately after birth in infants ≥34 weeks' gestational age. The uncertain effects of DCC and cord milking compared with ECC on major morbidities limit usefulness of available evidence for policy and practice.

A Randomized Controlled Trial of Intact Cord Milking versus Immediate Cord Clamping in Term Infants Born by Elective Cesarean Section

OBJECTIVE

We evaluated whether intact umbilical cord milking (UCM) is more effective than immediate cord clamping (ICC) in enhancing placental transfusion after elective cesarean delivery.

STUDY DESIGN

In a randomized trial, volume of placental transfusion was assessed by Δ hematocrit (Hct) between neonatal cord blood and capillary heel blood at 48 hours of age, corrected for the change in body weight.

RESULTS

There were no significant differences in cord blood mean Hct values at birth (UCM, 44.5 ± 4.8 vs. ICC, 44.9 ± 4.2%, p = 0.74). Conversely, at 48 hours of age, the UCM group had significantly higher capillary heel Hct values (UCM, 53.7 ± 5.9 vs. ICC, 49.8 ± 4.6%, p < 0.001), supporting a higher placental transfusion volume (Δ Hct, UCM 9.2 ± 5.2 vs. ICC 4.8 ± 4.7, p < 0.001), despite comparable neonatal body weight decrease (UCM, -7.3 vs. ICC, -6.8%, p = 0.77).

CONCLUSION

Higher Δ Hct between cord blood at birth and capillary heel blood at 48 hours of age, corrected for the change in body weight, suggests that intact UCM is an efficacious and safe procedure to enhance placental transfusion among neonates born via elective cesarean delivery.

CLINICAL TRIAL REGISTRATION

ClinicalTrials.gov, www.clinicaltrials.gov, NCT03668782.

[Newborn resuscitation and support of transition of infants at birth]

The European Resuscitation Council has produced these newborn life support guidelines, which are based on the International Liaison Committee on Resuscitation (ILCOR) 2020 Consensus on Science and Treatment Recommendations (CoSTR) for Neonatal Life Support. The guidelines cover the management of the term and preterm infant. The topics covered include an algorithm to aid a logical approach to resuscitation of the newborn, factors before delivery, training and education, thermal control, management of the umbilical cord after birth, initial assessment and categorisation of the newborn infant, airway and breathing and circulation support, communication with parents, considerations when withholding and discontinuing support.

Prevention of iron deficiency anemia in infants and toddlers

Anemia, defined as a low blood hemoglobin concentration, is a major global public health problem. Identification of anemia is crucial to public health interventions. It is estimated globally that 273 million children under 5 years of age were anemic in 2011, and about ~50% of those cases were attributable to iron deficiency (Lancet Global Health 1:e16-e25, 2013). Iron-deficiency anemia (IDA) in infants adversely impacts short-term hematological indices and long-term neuro-cognitive functions of learning and memory that result in both fatigue and low economic productivity. IDA contributes to death and disability and is an important risk factor for maternal and perinatal mortality, including the risks for stillbirths, prematurity, and low birth weight (Comparative Quantification of Health Risks: Global and Regional Burden of Disease Attributable to Selected Major Risk Factors. Ch. 3 (World Health Organization, Geneva, 2004)). Reduction in early infantile anemia and newborn mortality rates is possible with easily implemented, low- to no-cost intervention such as delayed cord clamping (DCC). DCC until 1-3 min after birth facilitates placental transfusion and iron-rich blood flow to the newborn. DCC, an effective anemia prevention strategy, requires cooperation among health providers involved in childbirth, and a participatory culture change in public health. Public intervention strategies must consider multiple factors associated with anemia listed in this review before designing intervention studies that aim to reduce anemia prevalence in infants and toddlers. IMPACT: Anemia, defined as a low blood hemoglobin concentration, is a major global public health problem and identification of anemia is crucial to public health interventions. Delayed cord clamping (DCC) until 1-3 min after birth facilitates placental transfusion and iron-rich blood flow to the newborn. Reduction in early infantile anemia and newborn mortality rates is possible with easily implemented, low- to no-cost intervention such as DCC.

Antenatal and perinatal factors influencing neonatal blood pressure: a systematic review

OBJECTIVE

A comprehensive understanding of the factors contributing to perinatal blood pressure is vital to ensure optimal postnatal hemodynamic support. The objective of this study was to review existing literature on maternal and perinatal factors influencing blood pressure in neonates up to 3 months corrected age.

METHODS

A systematic search of published literature in OVID Medline, OVID Embase and the COCHRANE library identified publications relating to maternal factors affecting blood pressure of neonates up to corrected age of 3 months. Summary data were extracted and compared (PROSPERO CRD42018092886).

RESULTS

Of the 3683 non-duplicate publications identified, 44 were eligible for inclusion in this review. Topics elicited were sociodemographic factors, maternal health status, medications, smoking during pregnancy, and cord management at birth. Limited data were available for each factor. Results regarding the impact of these factors on neonatal blood pressure were inconsistent across studies.

CONCLUSIONS

There is insufficient evidence to draw definitive conclusions regarding the impact of various maternal and perinatal factors on neonatal blood pressure. Future investigations of neonatal cardiovascular therapies should account for these factors in their study design. Similarly, studies on maternal diseases and perinatal interventions should include neonatal blood pressure as part of their primary or secondary analyses.

Effects of cord milking in late preterm infants and full-term infants: A systematic review and meta-analysis

BACKGROUND

Umbilical cord milking (UCM) consists of performing several milkings of the cord from the placenta to the newborn. The objective was to evaluate the effects of UCM on newborns ≥34 weeks' gestation.

METHODS

Searches were conducted in MEDLINE, EMBASE, CINAHL, the Cochrane Database of Clinical Trials, and the clinicaltrails.gov database for randomized clinical trials (RCT), with no time or language restrictions, and for articles that compared UCM with other strategies. The main results were initial hemoglobin and hemoglobin after 6 weeks. The data were collected by two reviewers and the quality of the studies was assessed using the Cochrane Manual methodology.

RESULTS

The sample included 1845 newborns in 10 RCTs. The use of UCM in ≥34 weeks' gestation newborns was not related to initial hemoglobin levels (pooled weighted mean difference: (PWMD = 0.40 g/L [-0.16 to 0.95]) or after 6 weeks (PWMD = 0.07 g/L [-0.29 to 0.27]). A reduction in hemoglobin levels was also observed at 6 weeks when the control group had undergone late clamping (PWDM = 0.16g/L [-0.26 to -0.06]).

CONCLUSIONS

UCM produced no differences in hematologic variables for newborns with ≥34 weeks of gestation relative to controls. However, a slight decrease in hemoglobin levels is observed at 6 weeks when the control group is made up of newborns with late clamping.

The Effect of Umbilical Cord Milking Compared with Delayed Cord Clamping in Term Neonates: A Randomized Controlled Trial

Objective

To study the effect of intact umbilical cord milking (I-UCM) procedure in comparison with the procedure of delayed cord clamping (DCC) in term neonates.

Study Design

A randomized controlled trial.

Setting

Department of Obstetrics and Gynecology and Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University.

Materials and Methods

The study was performed from June 2017 to March 2018. Singleton term pregnant women (37-42 weeks' gestation) were recruited. Neonates were randomized into DCC and I-UCM groups. Umbilical cord was 3 times milked toward the neonate in 25 cm length from umbilical stump which was still attached to the placenta before cutting the cord in I-UCM group. Delay in cord clamping for 60 seconds was performed before the cord cutting in DCC group. Neonatal and maternal outcomes were recorded.

Results

Of 168 neonates included in this trial, 84 cases were randomized into each group. The baseline characteristics of both groups were comparable. No statistical difference was found in terms of the mean of hemoglobin levels in the DCC and I-UCM groups which were 16.9 (±1.6) g/dl and 17.0 (±1.9) g/dl, respectively (P-value 0.75). There was no difference in terms of adverse neonatal and maternal outcomes in both groups.

Conclusion

Both I-UCM and DCC revealed a comparable effect on hematologic status without deleterious effects on neonatal and maternal outcomes at the age of 48-72 hours in term neonates.

Placental Transfusion for Asphyxiated Infants

The current recommendation for umbilical cord management of non-vigorous infants (limp, pale, and not breathing) who need resuscitation at birth is to immediately clamp the umbilical cord. This recommendation is due in part to insufficient evidence for delayed cord clamping (DCC) or umbilical cord milking (UCM). These methods may provide a neuroprotective mechanism that also facilitates cardiovascular transition for non-vigorous infants at birth.

Comparison of cut and intact cord milking regarding cerebral oxygenation, hemodynamic and hematological adaptation of term infants

OBJECTIVE

Although both delayed umbilical cord clamping and intact umbilical cord milking (I-UCM) provide the effective placental transfusion at birth, these procedures may not be used in neonates needing resuscitation. The aim of this study is to investigate the effect of cut umbilical cord milking (C-UCM), which permits resuscitation during an immediate transition period (ITP).

METHODS

Sixty-two healthy term infants were randomly divided into C-UCM and I-UCM groups at birth. Approximately 30-cm length of cord was milked towards the baby 2-4 times within 20 seconds after birth in both C-UCM and I-UCM groups while the umbilical cord was cut in the former, and intact in the latter. Heart rate, arterial oxygen saturation (SpO₂), cerebral regional oxygen saturation (crSO₂) (2nd-15th min), blood pressure (BP) (within 15-30 min), residual placental blood volume (RPBV), and hemoglobin levels (at the sixth hour) were monitored during ITP.

RESULTS

There were no significant differences in terms of mean gestational age (w) [(39.0 ± 1.2) versus (38.8 ± 1.1)], birth weight (g) [(3351.45 ± 254.30) versus (3256.94 ± 285.52)], Apgar scores at the 5th min (10 ± 0 versus 10 ± 0), first breathing time (sec) (5.4 ± 3.8 versus 5.7 ± 4.1), SpO₂, crSO₂, BP (mmHg) [(52.9 ± 6.9) versus (51.8 ± 5.7)], hemoglobin levels (g/dl) [(17.7 ± 1.8) versus (18.4 ± 1.4)], and RPBV (ml/kg) [(23.9 ± 4.7) versus (22.9 ± 5.4)] between C-UCM and I-UCM groups (p > .05).

CONCLUSION

This study showed that C-UCM is as effective as I-UCM on cerebral oxygenation, hemodynamic and hematological adaptation of term infants in ITP. We suggest that C-UCM can provide additional placental transfusion in term neonates exposed to early cord clamping.

The residual blood from segmental umbilical cord milking in preterm delivery

Umbilical cord milking is an alternative procedure providing blood to infants but there is no study in the proper length of umbilical cord and various gestational age. The aim of this study was to measure the blood volume in the umbilical cord of preterm infants at a certain length and to identify the correlation among blood volume, length, and circumference of umbilical cord, gestational age (GA), birth weight and placenta. Seventy-five pregnant women aged 18 years old and above with 24-36⁺⁶ weeks of gestation were included in this cross-sectional study. After delivery, a 15 to 45 cm of umbilical cord was cut and parameters of umbilical cord were recorded. The mean GA at birth was 241.84 ± 20.06 days. The mean length, diameter, and circumference were 23.31 ± 7.66, 1.10 ± 0.18, and 3.56 ± 0.75 cm, respectively. The mean residual blood volume was 11.58 ± 4.99 mL or 0.50 ± 0.18 mL/cm. Total residual blood volume had a significant positive strong correlation with umbilical cord length (r = 0.720, p < .001). To reduce complications from blood overload, the appropriate blood volume for preterm infant should be calculated from birth weight and umbilical cord length.Impact statementWhat is already known on this subject? The World Health Organisation recommends delayed cord clamping for newborn infants which neonatal resuscitation was not indicated but the majority of preterm infants needed resuscitation. Umbilical cord milking is an alternative procedure providing blood to infants. A small volume transfusion (10-20 m/kg) is commonly used for replacement in preterm neonates. Although there is a concern about the blood volume transferred into infants, blood volume and proper length of umbilical cord have not been thoroughly investigated.What do the results of this study add? In this study, the mean residual blood volume was 0.5 mL/cm and total residual blood volume had a significant positive strong correlation with umbilical cord length. In subgroup of very low birth weight group, the mean residual blood volume was 0.41 mL/cm; however, there was no statistically significant difference from other birth weight groups.What are the implications of these findings for clinical practice and/or further research? The appropriate length of umbilical cord for milking can be calculated from the estimated foetal weight and the mean residual blood volume per length (0.5 mL/cm); nevertheless, the calculation should be used with caution. The further study should investigate in extremely preterm or very low birth weight infants.

Delayed clamping vs milking of umbilical cord in preterm infants: a randomized controlled trial

BACKGROUND

It has been established that delayed umbilical cord clamping in preterm infants results in improvement in neonatal anemia, need for transfusion, incidence of necrotizing enterocolitis, and intraventricular hemorrhage by increasing neonatal circulating blood volume. However, the effects of umbilical cord milking as an alternative to delayed clamping in preterm infants are unclear.

OBJECTIVE

The primary objective of this study was to compare the effect of delayed clamping vs milking of the umbilical cord on the initial hematocrit concentration in preterm births (23-34 weeks gestation). In addition, we sought to compare the effects of delayed clamping vs milking on the incidences of intraventricular hemorrhage, necrotizing enterocolitis, and need for transfusion (secondary objectives).

STUDY DESIGN

The study was an unblinded randomized controlled trial of singleton preterm infants who were born 23 weeks 0 days to 34 weeks 6 days gestation and were assigned to 1 of 2 controlled study groups: delayed cord clamping for 60 seconds or milking of the cord towards the infant 4 times before clamping. Randomization occurred via block randomization with an allocation ratio of 1 to 1. The patients' third stage of delivery was standardized for route of delivery and randomization arm. All comparisons were preformed with an intent-to-treat analysis approach. The study was powered at 80% with a probability value of .05 for the primary outcome measure of a hematocrit difference of 3% between the 2 groups.

RESULTS

Of the 204 randomized patients, 104 were assigned to the delayed subgroup, and 100 were assigned to the milking subgroup. There were no significant differences in baseline maternal characteristics noted between groups. Though there was not any statistically significant difference in neonatal outcomes between the cord clamping and milking groups, the occurrences of transfusion (15.5% vs 9.1%; P=.24), necrotizing enterocolitis (5.8% vs 3.0%; P=.49), and intraventricular hemorrhage (15.5% vs 10.1%; P=.35) were all lower in the milking group. The milking group had higher initial hematocrit concentration compared with the delayed clamping group, although this was not significant (51.8 [6.2%] vs 49.9 [7.7%]; P=.07]. Peak bilirubin levels and need for phototherapy were similar between groups.

CONCLUSION

This study demonstrates that milking the umbilical cord may be an acceptable alternative to delayed cord clamping because there were similar effects on neonatal hematocrit concentrations and the need for neonatal transfusions and no increased risk for complications or neonatal morbidity. The present data support the concept that milking of the umbilical cord may offer an efficient and timely method of providing increased blood volume to the infant.

Milking of the Umbilical Cord in Term and Late Preterm Infants

Introduction

Umbilical cord milking is a procedure in which clamped or unclamped umbilical cord is grasped, and blood is pushed (“stripped”) two to four times towards the newborn, in a rapid time frame, usually within 20 seconds. The target of umbilical cord milking is to provide infants with their whole potential blood volume—of which they are deprived when early cord clamping is carried out—completing placental transfusion in a shorter time than delayed cord clamping. The aim of this narrative review is to analyse the literature regarding umbilical cord milking in term and late-preterm infants and to assess all possible benefits and limits of this procedure in clinical practice, especially in comparison to immediate and delayed cord clamping.

Methods

We analysed literature data concerning maternal, as well as neonatal, outcomes for term and late-preterm (gestational age ≥ 34 weeks) newborns who received umbilical cord milking.

Results

Most studies show comparable benefits for both umbilical cord milking and delayed cord clamping, especially in terms of haematological parameters when compared to immediate cord clamping. Umbilical cord milking may be a feasible procedure also for newborns requiring resuscitation.

Conclusions

Literature data concerning positive effects of umbilical cord milking are encouraging and suggest that umbilical cord milking may be a quick and effective method to provide placental transfusions to depressed infants. However, the lack of standardised procedures and the variation in evaluated outcomes as well as the limited number of patients enrolled in trials, along with the retrospective nature of some of them, prevent recommending umbilical cord milking as a routine procedure.

Cut umbilical cord milking: an ineffective method of placental transfusion in preterm infants?

Objective: To determine if umbilical cord milking performed on a cut umbilical cord segment increased the hemoglobin/hematocrit, with a reduction in the incidence of intraventricular hemorrhage, need for blood transfusions, and pressor requirement in infants with <35-weeks gestation.Study design: This was a single center, observational study in the NICU. One-hundred-six neonates received cut umbilical cord milking and two hundred ninety seven served as historical controls.Result: There were no statistically significant differences between the two groups in hemoglobin/hematocrit, peak bilirubin values, the incidence of intraventricular hemorrhage, need for blood transfusions, and the use of pressors.Conclusion: This is the first study using the cut umbilical cord milking technique that includes neonates with <35-weeks gestation. The procedure is safe but did not result in an increase in hemoglobin/hematocrit, nor did it reduce the incidence of intraventricular hemorrhage, need for blood transfusions, and pressor use.

Effects of Delayed Cord Clamping on 4-Month Ferritin Levels, Brain Myelin Content, and Neurodevelopment: A Randomized Controlled Trial

OBJECTIVE

To evaluate whether placental transfusion influences brain myelination at 4 months of age.

STUDY DESIGN

A partially blinded, randomized controlled trial was conducted at a level III maternity hospital in the US. Seventy-three healthy term pregnant women and their singleton fetuses were randomized to either delayed umbilical cord clamping (DCC, >5 minutes) or immediate clamping (ICC, <20 seconds). At 4 months of age, blood was drawn for ferritin levels. Neurodevelopmental testing (Mullen Scales of Early Learning) was administered, and brain myelin content was measured with magnetic resonance imaging. Correlations between myelin content and ferritin levels and group-wise DCC vs ICC brain myelin content were completed.

RESULTS

In the DCC and ICC groups, clamping time was 172 ± 188 seconds vs 28 ± 76 seconds (P < .002), respectively; the 48-hour hematocrit was 57.6% vs 53.1% (P < .01). At 4 months, infants with DCC had significantly greater ferritin levels (96.4 vs 65.3 ng/dL, P = .03). There was a positive relationship between ferritin and myelin content. Infants randomized to the DCC group had greater myelin content in the internal capsule and other early maturing brain regions associated with motor, visual, and sensory processing/function. No differences were seen between groups in the Mullen testing.

CONCLUSION

At 4 months, infants born at term receiving DCC had greater ferritin levels and increased brain myelin in areas important for early life functional development. Endowment of iron-rich red blood cells obtained through DCC may offer a longitudinal advantage for early white matter development.

TRIAL REGISTRATION

ClinicalTrials.gov: NCT01620008.

Umbilical Cord Milking: A Review

This is a review of umbilical cord milking, a controversial technique where the umbilical cord is squeezed several times before it is clamped an cut. While not physiological or natural for newborns, the question lies as to whether it is useful in certain circumstances, namely the depressed newborn. Here we review the literature and discuss why it could be considered as an alternative for the current practice of delayed cord clamping.

Haemodynamic effects of umbilical cord milking in premature sheep during the neonatal transition

OBJECTIVE

Umbilical cord milking (UCM) at birth may benefit preterm infants, but the physiological effects of UCM are unknown. We compared the physiological effects of two UCM strategies with immediate umbilical cord clamping (UCC) and physiological-based cord clamping (PBCC) in preterm lambs.

METHODS

At 126 days' gestational age, fetal lambs were exteriorised, intubated and instrumented to measure umbilical, pulmonary and cerebral blood flows and arterial pressures. Lambs received either (1) UCM without placental refill (UCMwoPR); (2) UCM with placental refill (UCMwPR); (3) PBCC, whereby ventilation commenced prior to UCC; or (4) immediate UCC. UCM involved eight milks along a 10 cm length of cord, followed by UCC.

RESULTS

A net volume of blood was transferred into the lamb during UCMwPR (8.8 mL/kg, IQR 8-10, P=0.01) but not during UCMwoPR (0 mL/kg, IQR -2.8 to 1.7) or PBCC (1.1 mL/kg, IQR -1.3 to 4.3). UCM had no effect on pulmonary blood flow, but caused large fluctuations in mean carotid artery pressures (MBP) and blood flows (CABF). In UCMwoPR and UCMwPR lambs, MBP increased by 12%±1% and 8%±1% and CABF increased by 32%±2% and 15%±2%, respectively, with each milk. Cerebral oxygenation decreased the least in PBCC lambs (17%, IQR 13-26) compared with UCMwoPR (26%, IQR 23-25, P=0.03), UCMwPR (35%, IQR 27-44, P=0.02) and immediate UCC (34%, IQR 28-41, P=0.02) lambs.

CONCLUSIONS

UCMwoPR failed to provide placental transfusion, and UCM strategies caused considerable haemodynamic disturbance. UCM does not provide the same physiological benefits of PBCC. Further review of UCM is warranted before adoption into routine clinical practice.

A new wrinkle: Umbilical cord management (how, when, who)

In the past five years, umbilical cord management in both term and preterm infants has come full circle, going from the vast majority of infants receiving immediate cord clamping to virtually all governing organizations promoting placental transfusion, mainly in the form of delayed cord clamping (DCC). Placental transfusion refers to the transfer of more blood components to the infant during the first few minutes after birth. The different strategies for ensuring placental transfusion to the baby include delayed (deferred) cord clamping, milking of the attached cord before clamping, and milking of the cut cord. In this review, we address the current evidence to date for providing placental transfusion in different circumstances and the methods for implementation. We also highlight the gaps in knowledge and areas for future research.

Does intact umbilical cord milking increase infection rates in preterm infants with premature prolonged rupture of membranes?

Objective: To investigate whether intact umbilical cord milking (I-UCM) can aggravate infection or result in other undesirable complications in preterm infants with premature prolonged rupture of membranes (PPROM).Methods: Neonates vaginally delivered between 28 and 37 weeks' gestation and complicated by PPROM before birth were randomly divided into two groups according to the cord clamping procedure: I-UCM before clamping and immediate cord clamping (ICC). Various parameters of the study participants were compared between the two groups.Results: Of 102 preterm infants, 48 and 54 were randomly allocated to the I-UCM and ICC groups, respectively. There were no significant differences between the two groups regarding hematological parameters (platelet count, white blood count, neutrophil ratio, and C-reactive protein) or neonatal outcomes (probable or certain neonatal infection, respiratory distress syndrome, necrotizing enterocolitis, and intraventricular hemorrhage) (p > .05). However, preterm neonates in the I-UCM group had higher serum hemoglobin and hematocrit levels (p < .05) and received fewer blood transfusions (p < .05) than those in the ICC group.Conclusion: Milking the umbilical cord to a preterm neonate with PPROM will not aggravate neonatal infection or result in other undesirable complications. This simple procedure will improve hemoglobin values and hematocrit levels and may lessen the need for transfusion during the neonatal period.

Umbilical cord milking for neonates who are depressed at birth: a randomized trial of feasibility

OBJECTIVE

To evaluate the feasibility and safety of umbilical cord milking (UCM) in neonates who are depressed at birth.

STUDY DESIGN

This is a quasi-randomized, non-blinded, controlled trial on infants (≥35 weeks) who were depressed at birth. UCM (cord milked three times) was performed during the even months and the neonates born during the odd months were in the control group. Primary outcome was feasibility and safety.

RESULTS

A total of 101 infants were enrolled (50 UCM group and 51 control group) between January 2015 and October 2016. UCM was performed in 95% of infants (59/62) who qualified to receive UCM. There were no significant differences in resuscitation delay, resuscitation efforts, and short-term outcomes between the two groups.

CONCLUSIONS

UCM is feasible for term and late preterm infants who are depressed at birth. A larger clinical trial is needed to evaluate long-term benefits of UCM in neonates with HIE.

Early Versus Delayed Umbilical Cord Clamping on Physiologic Anemia of the Term Newborn Infant

AIM

Our study aims to make a comparison between the effects of milking of umbilical cord versus delayed cord clamping on Hemoglobin level at 6 weeks from delivery among term neonates and which method is more beneficial for them.

DESIGN

It was a randomised control study. Participants were randomised into 2 groups; Group 1: 125 women were assigned to delay cord clamping; Group 2: 125 women were assigned to milking of the umbilical cord 5 times before cutting. Student t-test was used to compare between the two groups for quantitative data, for qualitative data chi-square test and the Correlation coefficient was done to test the association between variables.

SETTING

This study was at El-Galaa Teaching Hospital, labour suite. Cairo, Egypt.

PARTICIPANTS

A group of 250 pregnant women starting from ≥ 37 weeks' gestational age.

INTERVENTION

In this study, we searched if the mechanism of milking or delayed cord clamping could give some of the positive benefits for neonates or not.

RESULTS

In this study, we found that milking of the umbilical cord five times as in group 1 was associated with higher hemoglobin levels at 6 weeks after birth, at physiological anemia of the fetus and significant but clinically there was no difference between the two groups (10.4 ± 0.5 and 10.6 ± 0.5 respectively, P < 0.001). Also, there was a positive correlation between haemoglobin of the mother and the newborn during the first day and after 6 weeks with r = 0.349 and 0.283 respectively and a P value < 0.001. Furthermore, there was a positive correlation between the haemoglobin of the fetus after the first day and fetus at 6 weeks with r = 0.534 and a P value < 0.001. For most other outcomes (including APGAR score, positive pressure ventilation, poor neonatal outcomes such as respiratory distress syndrome there were no significant differences between the two groups. Our study may recommend the use of umbilical cord milking in term babies when delayed cord clamping is unavailable.

CONCLUSION

Umbilical cord blood milking after its clamping improves some important haematological parameters for newborns, especially in countries with high incidence of anaemia in newborns and children.

Strategies to Avoid Neonatal Blood Transfusions for Families of the Jehovah's Witness Faith

Beliefs and restrictions regarding acceptance of blood products by members of the Jehovah's Witness faith often provoke discussion among health care professionals regarding alternative interventions. Establishing and maintaining an open dialog with women and families of the Jehovah's Witness faith regarding their beliefs on the use of blood and blood products are vital in creating a therapeutic relationship between families and the health care team. Such rapport facilitates the discussion of strategies to avoid blood transfusions for newborns and provides women and families multiple opportunities to develop of a holistic birth plan congruent with their beliefs.

Umbilical cord milking at birth for term newborns with acidosis: neonatal outcomes

OBJECTIVE

To determine if umbilical cord milking is detrimental in compromised term/near-term infants.

STUDY DESIGN

A retrospective analysis of infants with abnormal cord gases (cord arterial or venous pH of ≤ 7.1 or base deficit > -12). We collected maternal risk factors, cord management, birth, and neonatal outcomes during hospitalization.

RESULT

We found 157 infants who met the criteria for abnormal cord gases. Thirty-six of those had umbilical cord milking at delivery. There was no significant difference in neonatal outcomes, but fewer infants in the cord milking group needed resuscitation (38 vs. 56%, p = 0.07) and ongoing respiratory support (19 vs. 31%, p = 0.16) compared to the immediate clamping group.

CONCLUSIONS

While not significant, infants who received cord milking at birth needed less resuscitation and ongoing respiratory support. This study suggests that umbilical cord milking appears to be a safe therapy when acidosis is present and when resuscitation is needed.

Italian Recommendations for Placental Transfusion Strategies

At delivery, if the cord is not clamped, blood continues to pass from the placenta to the newborn during the first minutes of life, allowing the transfer of 25-35 ml/kg of placental blood to the newborn, depending on gestational age, the timing of cord clamping, the position of the infant at birth, the onset of respiration, and administration of uterotonics to the mother. However, deriving benefits from delayed cord clamping (DCC) are not merely related to placental-to-fetal blood transfusion; establishing spontaneous ventilation before cutting the cord improves venous return to the right heart and pulmonary blood flow, protecting the newborn from the transient low cardiac output, and systemic arterial pressure fluctuations. Recent meta-analyses showed that delayed cord clamping reduces mortality and red blood cell transfusions in preterm newborns and increases iron stores in term newborns. Various authors suggested umbilical cord milking (UCM) as a safe alternative when delayed cord clamping is not feasible. Many scientific societies recommend waiting 30-60 s before clamping the cord for both term and preterm newborns not requiring resuscitation. To improve the uptake of placental transfusion strategies, in 2016 an Italian Task Force for the Management of Umbilical Cord Clamping drafted national recommendations for the management of cord clamping in term and preterm deliveries. The task force performed a detailed review of the literature using the GRADE methodological approach. The document analyzed all clinical scenarios that operators could deal with in the delivery room, including cord blood gas analysis during delayed cord clamping and time to cord clamping in the case of umbilical cord blood banking. The panel intended to promote a more physiological and individualized approach to cord clamping, specifically for the most preterm newborn. A feasible option to implement delayed cord clamping in very preterm deliveries is to move the neonatologist to the mother's bedside to assess the newborn's clinical condition at birth. This option could safely guarantee the first steps of stabilization before clamping the cord and allow DCC in the first 30 s of life, without delaying resuscitation. Contra-indications to placental transfusion strategies are clinical situations that may endanger mother 's health and those that may delay immediate newborn's resuscitation when required.

Golden hour of neonatal life: Need of the hour

"Golden Hour" of neonatal life is defined as the first hour of post-natal life in both preterm and term neonates. This concept in neonatology has been adopted from adult trauma where the initial first hour of trauma management is considered as golden hour. The "Golden hour" concept includes practicing all the evidence based intervention for term and preterm neonates, in the initial sixty minutes of postnatal life for better long-term outcome. Although the current evidence supports the concept of golden hour in preterm and still there is no evidence seeking the benefit of golden hour approach in term neonates, but neonatologist around the globe feel the importance of golden hour concept equally in both preterm and term neonates. Initial first hour of neonatal life includes neonatal resuscitation, post-resuscitation care, transportation of sick newborn to neonatal intensive care unit, respiratory and cardiovascular support and initial course in nursery. The studies that evaluated the concept of golden hour in preterm neonates showed marked reduction in hypothermia, hypoglycemia, intraventricular hemorrhage (IVH), bronchopulmonary dysplasia (BPD), and retinopathy of prematurity (ROP). In this review article, we will discuss various components of neonatal care that are included in "Golden hour" of preterm and term neonatal care.