Needle Preparation Technique
Needle Preparation Technique - Related Videos
09:26
Preparation and Using Phantom Lesions to Practice Fine Needle Aspiration Biopsies
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Cited by 6 •
2009
Practicing of fine needle aspiration biopsies (FNAB) by trainees is relatively challenging, due to the lack of an easily available, appropriate lesion. Preparation of an AV phantom lesion for practicing the FNAB procedure and mastering proficiency is relatively easy.
11:27
Preparation and Respirometric Assessment of Mitochondria Isolated from Skeletal Muscle Tissue Obtained by Percutaneous Needle Biopsy
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Cited by 25 •
2015
Methods for biopsy of Vastus lateralis, preparation of purified mitochondria, and respirometric profiling are described. The use of small muscle volume makes this technique suitable for clinical research applications.
09:51
Intraosseous Needle Placement
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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...
04:01
The Modified Single-working Portal Technique Using Lasso-loop Stitch with Needle for Arthroscopic Subscapularis Repair
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2025
We propose a modified arthroscopic technique of suturing the subscapular using a needle-through-line Lasso-loop through a unilateral anterior portal.
05:32
Povidone Iodine Rectal Preparation at Time of Prostate Needle Biopsy is a Simple and Reproducible Means to Reduce Risk of Procedural Infection
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Cited by 5 •
2015
Here, we present a protocol for use at the time of transrectal ultrasound guided prostate needle biopsy (TRUS PNB) that is a simple and cost-effective means to reduce infections following the procedure.
FAQs
The needle tip must match the intended manipulation because its condition influences delivery control and the risk of sample damage. Researchers select or shape a suitable needle, then adjust the tip for the specific biological material and target. Careful matching supports more precise handling of individual cells, embryos, or tissues and improves the reliability of downstream observations.
Cleaning removes contaminants that could interfere with the biological sample or compromise the experiment. This step is especially important when introducing genetic material, drugs, tracers, or cells, because unwanted material may affect the sample independently of the intended treatment. A consistently cleaned needle helps researchers distinguish the experimental effect from artifacts caused by preparation.
Loading places the desired solution or specimen into the prepared needle, while positioning aligns the tip with the intended biological target. Both steps require controlled handling because inaccurate loading or placement can reduce delivery precision and increase damage to the sample. Consistent execution helps preserve the intended experimental conditions during manipulation of cells, embryos, or tissues.
A typical preparation sequence begins with selecting or shaping a suitable needle, followed by cleaning it to remove contaminants. The needle is then filled with the desired solution or specimen, and its tip and position are adjusted for the planned manipulation. Maintaining this sequence creates consistent handling conditions before microinjection or microsurgery begins.
Prepared needles are useful when an experiment requires material to reach an individual cell, embryo, or tissue with precise handling. Applications supported by this approach include introducing genetic material, drugs, tracers, or cells. These manipulations allow developmental, cellular, and molecular studies to examine responses to a defined addition while limiting unnecessary disruption of the sample.
Consistency reduces variation caused by differences in needle condition, cleanliness, loading, or positioning. When preparation is performed in a controlled manner, researchers can compare manipulations more reliably and evaluate whether observed outcomes reflect the introduced material or specimen rather than avoidable handling differences. This supports experimental accuracy, reproducibility, and clearer interpretation of developmental, cellular, and molecular findings.