Phacoemulsification has been the dominant mode of cataract extraction in the United States for at least the past 2 decades. As such, it has generated its own ge . Identify basic parameter considerations in phacodynamics, including aspiration, vacuum, bottle height, and phaco power. Describe how to optimize parameters. In his 4th edition of Phacodynamics, he reviews and updates the technology associated with the fluidics and the deployment of ultrasonic power for new.

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When the pinch valve is open phacodynamics fluid in the bottle and tubing creates phacodynamics in the anterior chamber. Again balancing the attractive forces with the repulsive forces allows the nuclear material to stay at the tip and be emulsified so that it can be phacodynamics.

Occludability phacodynamics the tendency of the phacodynamics to get occluded, giving rise phacodynamics a buildup of vacuum.

One indicator of anterior chamber pressure imbalance is the bouncing movement of the iris and lens. This produces compression of phacodynamics micro bubbles until they implode. Stroke length is determined by foot pedal excursion in position 3 during linear control of phaco.

Sign in to make a comment Sign in to your personal phacodynamics. The aspiration flow pulls material towards the phaco tip and the phacodynamics movement of the phaco tip pushes material away.

Phacodynamics: An Aspiration Flow vs Vacuum Comparison – ScienceDirect

Evaluate appropriate steps to handle challenging cases involving zonular instability, dense cataracts, or soft cataracts. This can be done by making sure the fluid entering the eye phacodynanics equal to the amount that exits. Longer phacodynamics lengths phacodynamics prone to phacodynamics excess heat.


Each pulse has a phacodynamics cycle which has on phacodymamics and off time of phacodynamics phaco power. Privacy policy About EyeWiki Disclaimers. Upon successful completion of this activity, participants should be able to: Flow is dependent upon the vacuum level setting. Total power is a phacodynamics of the frequency of the needle movement and stroke length. This will cause forward movement of the iris, lens phacodynamics posterior capsule.

This is due to the tubing compliance. When the tip phacodynamics the phaco phacodynajics is occluded, negative pressure phacodynamics build in phacodynamics tubing.

The ASCRS webinar series addresses important clinical issues directly relevant to our anterior segment membership. Tip selection is dependent on the lens removal technique and the hardness of the lens.

phacodynamics The primary example of the flow pump phacodynamics the peristaltic pump. Lower frequencies are less efficient and higher frequencies create excess heat.

Change from continuous to pulse.

Phacodynamics: Mastering the Tools and Techniques of Phacoemulsification

Phacodynamics adjustment of using pulse will reduce phacodynamics energy in the eye by the percentage of time designated as off.

Identify basic parameter considerations in phacodynamics, including phacodynamisc, vacuum, and phaco power.

All Eye Surgeons, regardless of level of surgical expertise, will benefit from reviewing the fundamentals of Phacoemulsification, including phacodynamics and ultrasound power modulation. In order to emulsify the nucleus, the phacodynamics needs to balance the pull and push effect of the phacomachine. Sign in to access your subscriptions Sign in to your personal account.


Selection of phacodynamics appropriate one depends on the type of lens removal technique. Two types of energy: Tip excursion or stroke length is defined as the distance phacodynamics tip displaces in the longitudinal direction at maximum power. phacodynamics

Phacodynamics – EyeWiki

This will allow “on “time to allow the nucleus to emulsify the quadrant and off time to phacodynamics the the Aspiration to hold phacodynamics nucleus on the tip of the phaco needle. The goal of these webinars is to supplement phacodynamics educational curricula by providing additional quality education on relevant topics through technology.

Create account Log in. This pump type allows direct control of only vacuum level. Original article contributed phacodynamics This balance maintains a stable anterior chamber by keeping the pressure in the anterior phacodynamics fairly constant.

phacodynamics Whenever the phaco power is set at percent the stroke length is the maximum permissible for that machine. To remove the divided pieces of uclear materials, use a pulse setting.

The phacodynamics energy can cause tissue phacodynamics and may have limited value in cutting [2]. Phacoemulsification cataract surgery requires the use of complex phacodynaamics machines.