Tungsten Needle
Tungsten Needle - 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.
06:00
Wet Beveling of Microinjection Needles Utilizing Constant Air Pressure for Feedback on Needle Opening
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2024
This protocol describes the assembly of a pneumatic system for the delivery of pressurized air to a needle during the process of needle beveling. The protocol further describes the beveling process for creating sharp microinjection needles and how to gauge the relative opening size of the needle.
07:19
Fu's Subcutaneous Needling for Knee Osteoarthritis Pain
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Cited by 8 •
2023
We present a protocol for using Fu's subcutaneous needling for knee osteoarthritis pain, which combines swaying movement and reperfusion approach techniques. This protocol has great potential for future applications in myofascial pain treatment and could enhance Fu's subcutaneous needling (FSN) manipulation skills.
FAQs
Hardness helps the needle retain a sharply shaped tip, while rigidity supports controlled contact with cells or tissues. Together, these properties can reduce unwanted bending during penetration or handling. The resulting mechanical stability is especially relevant when researchers need precise access to a small target, such as during cell manipulation, embryo work, or tissue microdissection.
Electrical function depends on how the needle is designed and connected to instrumentation. A bare tip can support electrical stimulation or bioelectric recording, whereas insulation changes which portion interacts electrically with the specimen. Selecting between these configurations helps match the probe to the intended task, whether delivering a signal, detecting activity, or performing primarily mechanical manipulation.
Tip shaping determines how the probe interacts mechanically with a biological target. A sharp tip can provide controlled access through cell membranes or tissues, while the needle's rigidity helps maintain the intended path. This combination supports fine-scale operations in which excessive movement or imprecise contact could reduce control during manipulation, recording, or microdissection.
Mechanical use relies mainly on the needle's shaped, rigid tip for penetration, handling, or dissection. Electrical use additionally depends on conductivity, insulation, and connection to suitable instrumentation so the probe can stimulate or record. The same tungsten-based platform can therefore support different experiments, but its design must match whether physical access, electrical interaction, or both are required.
A suitable needle is selected and shaped for the target task, then positioned so its tip can provide controlled access or handling. In microinjection, the probe is used to enter the relevant biological material; in other work, it may guide manipulation or microdissection. Careful control of positioning and connection to instrumentation supports reproducible experimental handling.
An insulated design is useful when electrical interaction should be limited to the intended tip or when the probe must combine localized electrical access with controlled mechanical positioning. By contrast, a bare tip can deliver stimulation or record bioelectric signals through the exposed conductive region. The choice depends on the experiment's required balance between electrical selectivity and physical access.
In neural research, these probes can support electrical stimulation or recording of bioelectric signals, depending on their insulation and instrumentation. More broadly, they are used for embryo and cell microinjection, tissue handling, and microdissection. Their value comes from combining fine shaping, mechanical stability, and electrical conductivity in experiments that require controlled interaction with small biological targets.