Dissecting Needles
Dissecting Needles - Related Videos
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...
08:25
Needle Thoracostomy
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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...
10:06
Personalized Needles for Microinjections in the Rodent Brain
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Cited by 3 •
2018
We describe here a protocol for microinjection in the rodent brain that uses quartz needles. These needles do not produce detectable tissue damage and ensure reliable delivery even in deep regions. Moreover, they can be adapted to research needs by personalized designs and can be re-used.
12:57
Dissection of Saccharomyces Cerevisiae Asci
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Cited by 8 •
2009
Micromanipulation of yeast cells is needed for meiotic genetic analysis or to select diploid zygotes. These micromanipulations are carried out using the microneedle of a dissection microscope. The microneedle is used to relocate cells and is controlled by a micromanipulator which are available with various degrees of automation.
10:18
Dissection of Organs from the Adult Zebrafish
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Cited by 167 •
2010
This protocol describes a procedure for identifying and dissecting organs from the adult zebrafish.
FAQs
The narrow tip concentrates force at a small contact area, so the user can separate or reposition a limited region rather than disturb the surrounding specimen. This precision is especially useful when teasing apart tissues or tracing an anatomical structure under magnification. Because the instrument occupies little space at the tip, it helps preserve visibility during observation.
Dissecting needles complement, rather than replace, other dissection tools. Their pointed tips support localized manipulation and positioning, while forceps, scalpels, and dissecting microscopes contribute different functions within the same setup. Selecting the needle for fine control and using the other tools alongside it can improve preparation without substantially obscuring the field of view.
Control of the applied force is central to successful use. Too little directed pressure may not separate or hold the material, whereas poorly controlled movement can interfere with the specimen’s organization or the observer’s view. A narrow tip is most valuable when handling remains deliberate and localized, allowing structures to be examined in relation to one another.
Depending on the objective, a needle can position material, tease apart tissues, trace structures, transfer small specimens, or hold material steady for examination. It may be used with forceps or a scalpel during preparation and then with a dissecting microscope for inspection. This coordinated use supports both specimen preparation and close anatomical observation.
In biology, these instruments support investigations at several organizational levels. During organismal anatomy work, they help expose and follow structures; in tissue studies, they assist with separation and positioning; in developmental work, they help manipulate developmental structures for examination. The resulting preparation can make relationships among structures easier to observe and interpret.
Beyond immediate specimen handling, repeated use develops practical laboratory skills. Students learn to apply controlled, localized movements while maintaining a clear view of the material, and researchers can prepare specimens for microscopic examination with minimal obstruction. These practices connect manual precision to biological interpretation, because better preparation helps reveal tissue organization and anatomical relationships.