Skip to main content
Journal cover image

A comparison of Icare PRO and Tono-Pen XL tonometers in anesthetized children.

Publication ,  Journal Article
McKee, EC; Ely, AL; Duncan, JE; Dosunmu, EO; Freedman, SF
Published in: J AAPOS
August 2015

BACKGROUND: Tonometry in the anesthetized child, vital for evaluating known or suspected glaucoma, remains limited to tonometers capable of supine recording. The Icare PRO measures intraocular pressure (IOP) in the sitting or supine patient. The purpose of this study was to compare Icare PRO and Tono-Pen tonometry during examination under anesthesia in eyes of supine children with normal eyes and glaucoma and/or corneal pathology. METHODS: In this prospective study of children undergoing examination under anesthesia, IOP was recorded in both eyes with Icare PRO and Tono-Pen immediately after mask anesthesia induction, with instrument order randomized. RESULTS: A total of 100 eyes of 50 children (median age, 58 months) were included. IOP range was 6-50 mm Hg by Icare PRO and 6-53 mm Hg by Tono-Pen. Mean IOP measured by Tono-Pen (18.9 ± 7.5) was higher than that measured by Icare PRO (16.7 ± 7.1 mm Hg) by 2.2 mm Hg (P < 0.001). The presence of corneal edema was associated with IOP measurements higher by Tono-Pen than by Icare PRO (mean difference, 8.4 mm Hg). When eyes with corneal edema were excluded from analysis, there was no correlation between central corneal thickness and the difference in IOP between the two instruments. CONCLUSIONS: IOP in eyes of supine children under anesthesia measured approximately 2 mm Hg higher by Tono-Pen than Icare PRO and this difference was greater in eyes with frank corneal edema. Icare PRO may become a valuable tool for tonometry in supine infants and children, but a confirmatory test should be considered in eyes with corneal edema.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

J AAPOS

DOI

EISSN

1528-3933

Publication Date

August 2015

Volume

19

Issue

4

Start / End Page

332 / 337

Location

United States

Related Subject Headings

  • Tonometry, Ocular
  • Supine Position
  • Reproducibility of Results
  • Prospective Studies
  • Physical Examination
  • Ophthalmology & Optometry
  • Ocular Hypertension
  • Male
  • Intraocular Pressure
  • Infant, Newborn
 

Citation

APA
Chicago
ICMJE
MLA
NLM
McKee, E. C., Ely, A. L., Duncan, J. E., Dosunmu, E. O., & Freedman, S. F. (2015). A comparison of Icare PRO and Tono-Pen XL tonometers in anesthetized children. J AAPOS, 19(4), 332–337. https://doi.org/10.1016/j.jaapos.2015.04.004
McKee, Elliot C., Amanda L. Ely, Jared E. Duncan, Eniolami O. Dosunmu, and Sharon F. Freedman. “A comparison of Icare PRO and Tono-Pen XL tonometers in anesthetized children.J AAPOS 19, no. 4 (August 2015): 332–37. https://doi.org/10.1016/j.jaapos.2015.04.004.
McKee EC, Ely AL, Duncan JE, Dosunmu EO, Freedman SF. A comparison of Icare PRO and Tono-Pen XL tonometers in anesthetized children. J AAPOS. 2015 Aug;19(4):332–7.
McKee, Elliot C., et al. “A comparison of Icare PRO and Tono-Pen XL tonometers in anesthetized children.J AAPOS, vol. 19, no. 4, Aug. 2015, pp. 332–37. Pubmed, doi:10.1016/j.jaapos.2015.04.004.
McKee EC, Ely AL, Duncan JE, Dosunmu EO, Freedman SF. A comparison of Icare PRO and Tono-Pen XL tonometers in anesthetized children. J AAPOS. 2015 Aug;19(4):332–337.
Journal cover image

Published In

J AAPOS

DOI

EISSN

1528-3933

Publication Date

August 2015

Volume

19

Issue

4

Start / End Page

332 / 337

Location

United States

Related Subject Headings

  • Tonometry, Ocular
  • Supine Position
  • Reproducibility of Results
  • Prospective Studies
  • Physical Examination
  • Ophthalmology & Optometry
  • Ocular Hypertension
  • Male
  • Intraocular Pressure
  • Infant, Newborn