25-gauge Transvitreal Pars Plana
25-gauge Transvitreal Pars Plana - Related Videos
01:20
Pressure Gauges
0 Views •
2023
Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
12:24
PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins
0 Views •
Cited by 267 •
2010
RNA transcripts are subject to extensive posttranscriptional regulation that is mediated by a multitude of trans-acting RNA-binding proteins (RBPs). Here we present a generalizable method to identify precisely and on a transcriptome-wide scale the RNA binding sites of RBPs.
01:15
Design Example: Strain Gauge Bridge or Wheatstone Bridge
0 Views •
2024
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
07:03
In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence
0 Views •
2020
Presented here is a method to measure the birefringence of vacuum windows by maximizing the fluorescence counts emitted by Doppler cooled 25Mg+ ions in an ion trap. The birefringence of vacuum windows will change the polarization states of the laser, which can be compensated by changing the azimuthal angles of external wave plates.
09:26
How to Build a Vacuum Spring-transport Package for Spinning Rotor Gauges
0 Views •
Cited by 1 •
2016
Here we describe how to build a robust spring-transport mechanism for a spinning rotor gauge. This device securely immobilizes the rotor and keeps it under vacuum during transportation. We also describe packaging that minimizes the risk of damage during transport. Tests show our design works for typical shocks during transport.
FAQs
The pars plana provides an access region behind the iris, allowing the instrument to enter the vitreous without traversing the lens. This route is important when researchers need to reach posterior ocular structures or the vitreous while limiting direct interaction with the lens. Its anatomical placement therefore supports targeted delivery and vitreoretinal procedures.
The 25-gauge format uses a small-diameter instrument, which is consistent with the minimally invasive design of the technique. A smaller instrument can help limit tissue disruption while still providing access through the pars plana and vitreous. This balance is relevant to reproducible biological experiments and procedures that require controlled posterior-eye access.
Entry-site placement, penetration depth, sterility, and injection volume are central control variables. Accurate positioning helps direct access through the intended anatomical route, while depth and volume affect how consistently material or a procedure reaches the target region. Sterility is essential for limiting procedure-related complications. Controlling these factors improves reproducibility across experiments or interventions.
The approach creates a controlled path from the pars plana through the vitreous to the posterior eye. That path can support either material delivery or a targeted procedure, depending on the research or clinical objective. Because the route avoids direct lens passage, it is particularly relevant to studies focused on vitreous, retinal, or other posterior ocular targets.
A typical workflow begins by selecting and controlling the pars plana entry site, followed by advancing the 25-gauge instrument through the vitreous. The operator then delivers the intended material or performs the planned targeted procedure while controlling penetration depth and injection volume. Maintaining sterility throughout the workflow supports reliable results and helps limit procedure-related complications.
Researchers may use it for intravitreal delivery, retinal disease models, ocular imaging, or vitreoretinal interventions. The technique is useful when an experiment requires access to the vitreous or posterior eye without direct lens passage. Careful control of the access route and delivery conditions can make findings more reproducible and reduce tissue disruption associated with the procedure.