Needle Penetration
Needle Penetration - Related Videos
10:12
Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers
0 Views •
Cited by 5 •
2022
This protocol describes the synthesis of cyclic cell-penetrating peptides with aromatic cross-links and the evaluation of their permeability across biological barriers.
09:51
Intraosseous Needle Placement
0 Views •
2023
Source: Julianna Jung, MD, FACEP, Associate Professor of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA For unstable patients requiring urgent administration of medications, fluids, or blood products, establishing vascular access quickly is essential. However, there are many factors that can complicate placement of a peripheral intravenous cannula (PIV), and it is extremely common for PIV attempts to fail. PIV placement may be technically challenging in small...
08:39
Shifting Zebrafish Lethal Skeletal Mutant Penetrance by Progeny Testing
0 Views •
Cited by 8 •
2017
The goal of this protocol is to alter the penetrance of lethal skeletal mutant phenotypes in zebrafish by selective breeding. Lethal mutants cannot be grown to adulthood and bred themselves, therefore this protocol describes a method for tracking and selecting penetrance through multiple generations by progeny testing.
03:30
Inducing Penetrating Traumatic Brain Injury in Adult Drosophila Flies
0 Views •
2025
This video demonstrates the induction of penetrating traumatic brain injury in the drosophila brain. Newly emerged flies are selected, anesthetized, and positioned under a fluorescence-equipped stereo microscope. The GFP-expressing mushroom body is identified, and a Minutien pin is inserted to cause injury. The flies are allowed to recover for further studies.
08:25
Needle Thoracostomy
0 Views •
2015
Source: Rachel Liu, BAO, MBBCh, Emergency Medicine, Yale School of Medicine, New Haven, Connecticut, USA A tension pneumothorax is a life-threatening situation in which excess air is introduced into the pleural space surrounding the lung, either through trauma to the chest cavity or as a spontaneous leak of air from the lung itself. Air trapped within the pleural space causes separation of the lung from the chest wall, disrupting normal breathing mechanisms. Pneumothorax may be small without...
FAQs
At the tip, the bevel concentrates insertion force into a small area, deforming and separating tissue so the needle can advance. The shaft then contributes friction as it moves through tissue. Because these forces occur at different parts of the device, both tip geometry and shaft-tissue interaction affect the force required, the stability of access, and potential discomfort.
Needle penetration changes when bevel geometry, insertion angle, speed, or tissue stiffness changes. A different bevel can alter how the tip engages tissue, while angle and speed modify the way force is applied during advancement. Stiffer tissue can resist deformation more strongly. Together, these variables influence penetration force, placement accuracy, and patient discomfort.
Penetration force provides information about the resistance encountered during advancement, whereas accuracy concerns whether the needle reaches the intended target. Discomfort is another outcome affected by the interaction between device and tissue. Considering these measures together helps evaluate insertion techniques and supports development of devices intended to improve safety and patient experience.
A clinician can select a suitable needle and adjust the insertion technique by considering bevel geometry, insertion angle, speed, and the stiffness of the tissue involved. Controlling these factors during advancement helps manage the force applied to tissue and supports accurate access. This reasoning is relevant when choosing approaches for injections, blood collection, or biopsies.
Needle penetration supports injections, blood collection, biopsies, and other minimally invasive procedures that require access through skin or tissue. The immediate goal differs across these uses, such as delivering a substance or obtaining a sample, but each depends on controlled advancement toward the intended site. The same mechanics therefore inform diverse clinical applications.
In medicine, needle penetration research connects clinical technique with tissue mechanics, the study of how tissues respond to applied forces. Findings can guide safer drug-delivery and sampling-device design, improve procedural guidance, and support robotic needle placement. These applications extend beyond manual insertion by using force and tissue interaction to inform device development and targeting.