Dose-response Relationship of Phototherapy for Hyperbilirubinaemia Using Diodes: is There a "Saturation Point"

NCT01470820 | Completed

• 1 other identifier: N-20090014
• Study Type: interventional
• Target: 151
• Locations: 1 country
• Sites: 1

Brief Summary

Background: Using light emitting diodes (LED's) during conventional phototherapy it is possible to reduce the distance from light source to infant, thereby increasing light irradiance. Objective: To examine the relation between light irradiance and the rate of decrease in total serum bilirubin concentration (TsB) and to see if the investigators can identify a "saturation point", i.e. an irradiation level above which there is no further decrease in TsB. Design: Prospective randomised study. Setting: Neonatal Intensive Care Unit, Pediatric Department, Aalborg Hospital, Aarhus University Hospital, Denmark. Material and method: 151 infants with gestational age ≥ 33 weeks and uncomplicated hyperbilirubinaemia are randomised to one of 4 different distances from phototherapy device to mattress (20, 29, 38 and 47 cm). TsB is measured before and after 24 hours of phototherapy and irradiance every 8th hour. Main outcome measure is 24 hours decrease of TsB expressed in percent (∆ TsB0-24 (%)).

Conditions

Neonatal Hyperbilirubinemia

Keywords

Neonates; Hyperbilirubinemia; Phototherapy; Light irradiance; Saturation point

Outcome Measures

Primary Outcomes (1)

• 24 hours decrease of TsB expressed in percent.

  TsB was measured before and after 24 hours of phototherapy and irradiance every 8th hour. Main outcome was 24 hours decrease of TsB expressed in percent (∆ TsB0-24(%).

  Baseline and 24 hours

Study Arms (4)

Distance 20 cm

ACTIVE COMPARATOR

The infants were randomized by sealed and opaque envelopes to one of four phototherapy regimens. Either with distance from the phototherapy device to the mattress of 20, 29, 38 or 47 cm measured by a wood stick for each infant, corresponding to the distances to the infants of averagely 12, 21, 30 and 39 cm, respectively.

Other: Phototherapy with blue light

Distance 29 cm

ACTIVE COMPARATOR

Other: Phototherapy with blue light

Distance 38 cm

ACTIVE COMPARATOR

Other: Phototherapy with blue light

Distance 47 cm

ACTIVE COMPARATOR

Other: Phototherapy with blue light

Interventions

Phototherapy with blue light OTHER

The infants were placed in a bassinet with the phototherapy device placed above them. All infants were exposed naked (apart from eye pads and diaper) to continuously phototherapy for 24 hours, interrupted only for feeding and nursing for 30 minutes every three hours. TsB was determined before phototherapy and after 24 hours of treatment. The phototherapy apparatus used was neoBLUE LED phototherapy device (Natus Medical Inc., San Carlos, CA, USA) emitting blue light with an emission peak at 460 nm and a bandwidth of 450-470 nm. The irradiance was measured by use of the neoBLUE LED phototherapy radiometer (Natus Medical Inc.) every 8th hour at the infants head, trunk and knees and the average was calculated. The radiometer measures spectral irradiance in the range 420-500 nm with maximum sensitivity in the spectrum 440-480 nm.

Distance 20 cm; Distance 29 cm; Distance 38 cm; Distance 47 cm

Eligibility Criteria

• Age: 33 Weeks+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• Gestational age ≥ 33 weeks
• Uncomplicated neonatal hyperbilirubinemia

You may not qualify if:

• \< 33 weeks
• infants in incubators

Sponsors & Collaborators

• University of Aarhus: lead
• Aarhus University Hospital: collaborator

Study Sites (1)

Pediatric Department, Aalborg Sygehus, Aarhus University Hospital

Aalborg, 9000, Denmark

Location

Related Publications (1)

• Vandborg PK, Hansen BM, Greisen G, Ebbesen F. Dose-response relationship of phototherapy for hyperbilirubinemia. Pediatrics. 2012 Aug;130(2):e352-7. doi: 10.1542/peds.2011-3235. Epub 2012 Jul 16.

  PMID: 22802603 DERIVED

MeSH Terms

Conditions

Hyperbilirubinemia, Neonatal; Hyperbilirubinemia

Interventions

Phototherapy; Blue Light

Condition Hierarchy (Ancestors)

Infant, Newborn, Diseases; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Pathologic Processes; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Therapeutics; Light; Electromagnetic Radiation; Electromagnetic Phenomena; Magnetic Phenomena; Physical Phenomena; Optical Phenomena; Radiation; Radiation, Nonionizing

Study Officials

• Pernille K Vandborg, MD

  Pediatric department, Aalborg Sygehus, Aarhus University Hospital

  PRINCIPAL INVESTIGATOR

• Finn Ebbesen, Professor

  Pediatric department, Aalborg Sygehus, Aarhus University Hospital

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: HEALTH SERVICES RESEARCH
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 4, 2011
• First Posted: November 11, 2011
• Study Start: July 1, 2009
• Primary Completion: December 1, 2010
• Study Completion: December 1, 2010
• Last Updated: November 11, 2011

Record last verified: 2011-11

Locations

DK (1)