Indications

Indications 

  • Ocular trauma
  • Acute eye pain 
  • Intraocular foreign body 
  • Vision loss 
  • Infection
  • Change of vision
  • Difficult and/or inconclusive fundoscopic exam
  • Leukocoria 

Contraindications 

  • Suspected globe rupture 

 

Equipment 

  • US machine 
  • High frequency linear probe 
  • Tegaderm transparent adhesive 
  • Sterile Gel

Preset

  • Ocular/ophthalmic preset

* The eye is more vulnerable to the bioeffects of ultrasound than most other body tissues. For this reason, it is essential to maintain a very  low mechanical index (MI) and thermal index (TI) during ocular scanning to minimize the theoretical risk of tissue damage [3]. If your PoCUS system does not provide a dedicated ocular/ophthalmic preset, the MI should be set at 0.23 or lower and the TI of 1.0 or lower [17-19]. Doppler modes (color and pulsed wave) increase acoustic output (energy), and such, their use is not recommended in pediatric ocular PoCUS.  

The MI/TI can be found on the imaging screen on most PoCUS machines. (Figure 1)  

 

Figure 1. Acceptable MI and TI as seen on ophthalmic preset of a Sonosite PoCUS unit.