Is Paracetamol an Effective Treatment for Chronic Moderate Pain in the Newborn After Operative Vaginal Delivery?

Condition(s) targeted: Pain

Intervention: Paracetamol (Acetaminophen) (Drug)

Phase: Phase 4

Status: Recruiting

Sponsored by: Basel Women’s University Hospital

Official(s) and/or principal investigator(s):
Irene Hösli, Prof. Dr. med., Principal Investigator, Affiliation: Basel, womens university hospital

Overall contact:
Eva Maria E Tinner, Dr. med., Email: eva-maria.tinner@marcellosendos.ch

There are many reasons for using a vacuum apparatus or forceps to assist in delivering a baby. The traction and pressure on the baby`s head due to the vacuum apparatus or forceps may cause pain and discomfort for some time after the delivery. To date, the pain experienced by the newborn and the potential beneficial effects of pain medications after vacuum or forceps deliveries have not been systematically studied. It is possible that administration of paracetamol suppositories to the newborn may be helpful in these situations, since this medication is known to ameliorate pain in older children and adults.

Official title: Is Paracetamol an Effective Treatment for Chronic Moderate Pain in the Newborn After Operative Vaginal Delivery?

Study design: Treatment, Randomized, Double-Blind, Placebo Control, Parallel Assignment, Efficacy Study

Primary outcome: Measurement of pain reaction using the EDIN scale on the first day of life and evaluation of the stress-reaction after the Guthrie test with duration of crying, saliva cortisol and "Bernese Pain Scale for Neonates"

Secondary outcome: Validation of the Bernese Pain Scale for Neonates and the EDIN scale. Comparison between different types of vacuum extractors in view of neonatal pain. Comparison of different modes of delivery in view of neonatal pain and stress-reaction.

Detailed description: How will this study be conducted?

The study will be conducted in the Women`s University Hospital of Basel, the Women`s University Hospital of Zurich and the Women`s University Hospital of Bern. Newborn infants born with the aid of a vacuum or forceps will be included, with the explicit permission of their parents. The children will receive a rectal suppository, which will be prepared by the pharmacy at the Women`s University Hospital of Basel, at two and eight hours of postnatal age. These children will receive either paracetamol or a placebo, which will be randomly assigned. The doctors, the midwives, nurses and other people involved in the care of the child will not know which medication had been given. Only the pharmacy has access to this information, which can be obtained only in emergency situations. The child will be regularly monitored for signs of pain or discomfort.

In Switzerland, all newborn babies are tested at three days of age for thyroid and other rare but treatable diseases by taking a blood sample from the heel. Newborns that participate in this study will be observed after this blood draw to see how long they show signs of pain or discomfort. In addition, sputum tests before and after the blood draw will be taken in order to measure the level of cortisone (a measurement of stress).

What measures will be performed?

- Two suppositories, either with or without paracetamol, will be administered (only to

children in the study group, that is, those that were born with the aid of a vacuum or forceps).

- On the first day of life, at 2, 4, 8, 12 and 24 hours after delivery, a midwife or

nurse will examine the newborn (EDIN scale) and determine if he or she has pain, and if so, will indicate how strong the pain appears to be.

- On the fourth day of life, at the same time that the standard blood screening tests for

metabolic diseases are performed, a saliva test to identify the stress hormone cortisol will be taken before and after the blood tests and the pain reaction will be measured. The length of time that the child cries after the blood test has been performed will be observed and filmed, in order to more accurately determine the duration of the crying. This film will be destroyed after the study has been completed.

- As with all other newborns, we will give the child a small amount of sugar solution

before taking the blood sample to reduce the pain. The efficacy of this measure has been well documented.

No child will have additional blood tests outside of the routinely performed screening tests through participation in this study.

In order to determine whether babies born by caesarean section or without any assistance through instruments such as vacuum or forceps experience less pain and have a less dramatic stress reaction, we will enroll also children, who were born without the aid of one of these instruments, for observation in this study. They will not receive any medication.

Minimum age: N/A. Maximum age: 1 Hour. Gender(s): Both.

Criteria:

Inclusion Criteria:

- Newborns after vacuum or forceps extraction for paracetamol or placebo

- Newborns after vaginal delivery or cesarean section as observational group

- Gestational age at or above 35 weeks

- Birthweight above 2000g

- Signed informed consent of parents

Exclusion Criteria:

- Multiples

- Fetal malformation

- Systemic opiates within 24 hours before birth

- Ambulatory birth (mother and child leave the hospital a few hours after birth)

Eva Maria E Tinner, Dr. med., Email: eva-maria.tinner@marcellosendos.ch

Neonatology and Obstetrics, University Hospital Inselspital Berne, Berne 3010, Switzerland; Recruiting
Daniel Surbek, Prof. Dr. med., Email: daniel.surbek@insel.ch
Mathias Nelle, Prof. Dr. med., Email: Mathias.Nelle@insel.ch

Neonatology and Obstetrics, University Hospital Zurich, Zurich 8091, Switzerland; Recruiting
Hans U Bucher, Prof. Dr. med., Email: buh@usz.ch

Basel, womens university hospital, Basel, BS 4031, Switzerland; Completed

Related publications:

Debillon T, Zupan V, Ravault N, Magny JF, Dehan M. Development and initial validation of the EDIN scale, a new tool for assessing prolonged pain in preterm infants. Arch Dis Child Fetal Neonatal Ed. 2001 Jul;85(1):F36-41.

Cignacco E, Mueller R, Hamers JP, Gessler P. Pain assessment in the neonate using the Bernese Pain Scale for Neonates. Early Hum Dev. 2004 Jul;78(2):125-31.

Starting date: June 2007
Last updated: April 14, 2009