Landmark Guided Technique
Landmark Guided Technique - Related Videos
08:42
Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
0 Views •
Cited by 21 •
2018
This protocol provides a comprehensive dissection and analysis guide for the use of deep ocular landmarks, s-opsin immunohistochemistry, Retistruct, and custom code to accurately and reliably orient the isolated mouse retina in anatomical space.
05:08
A Stereotactically Guided Ablation Technique for Auditory Cortex Removal in Rats
0 Views •
2025
This video demonstrates a stereotactically-guided surgical procedure for ablating the auditory cortex in a rat. The steps include identifying anatomical landmarks in an anesthetized rat secured in a stereotactic frame, creating a window on the skull above the auditory cortex, aspirating the cortical layers, and providing post-operative care to assess the impact of the ablation on sound processing.
04:47
Systematic Bronchoscopy: the Four Landmarks Approach
0 Views •
Cited by 4 •
2023
Here, we present a protocol to navigate the bronchial maze in a structured manner, splitting the bronchoscopy into a stepwise approach-the four landmarks approach.
05:22
Systematic Endobronchial Ultrasound - The Six Landmarks Approach
0 Views •
Cited by 1 •
2023
Endobronchial ultrasound-guided sampling using transbronchial needle aspiration plays a key role in staging and diagnosing lung cancer. We propose a systematic stepwise approach dividing the procedure into six landmarks that should be taught to new operators.
05:04
Ultrasound-Guided Implantation: A Technique to Implant Pancreatic Ductal Adenocarcinoma Cells into an Adult Mouse
0 Views •
2023
This video describes the protocol for ultrasound-guided orthotopic implantation of murine-derived pancreatic ductal adenocarcinoma cells directly into the pancreas of the mouse. This causes less inflammation at the implantation site compared to surgical procedures.
FAQs
Surface anatomy provides the starting reference for estimating a deeper target. Clinicians combine visible or palpable features with knowledge of how tissues relate to one another, rather than relying on a single external point. This reasoning helps them choose an entry location and trajectory, while recognizing that the estimate depends on the individual’s anatomy.
Standardized measurement points make the approach more reproducible by giving the clinician a consistent way to estimate target location and plan device advancement. The planned path links the surface reference to the underlying structure, helping organize the procedure before insertion. These landmarks also provide a framework for checking progress and interpreting whether the observed course remains appropriate.
Anatomical variation can alter the relationship between a surface landmark and the intended target, so a familiar reference does not guarantee an identical path in every patient. Clinicians must integrate the landmark estimate with ongoing observation of procedural landmarks and patient response. If precision or safety may improve with imaging, that consideration becomes part of the clinical assessment.
A systematic workflow begins with identifying the relevant visible or palpable landmarks and applying standardized measurement points to estimate the target. The clinician then plans the device path, advances the needle, catheter, or instrument, and monitors procedural landmarks and patient response. This sequence turns surface anatomy into an organized decision process rather than an unstructured attempt to locate the target.
Its practical value is greatest when imaging equipment is unavailable, because clinicians can still use surface anatomy and tissue relationships to guide procedures. However, the method also requires judgment about expected precision and safety. Image guidance may be considered when visual confirmation could improve localization, precision, or safety, making technique selection part of procedural planning.
Within clinical practice, the approach supports injections, regional anesthesia, and vascular access. Its value extends beyond placing a device: it encourages systematic use of anatomy, standardized reference points, and patient monitoring. These features can help clinicians organize the procedure and recognize when anatomical variation or the need for greater precision makes another guidance strategy more appropriate.