Subcutaneous Saline Injection
Subcutaneous Saline Injection - Related Videos
03:15
A Hypertonic Saline Injection Technique for Inducing Glaucoma in Rats
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2025
This video demonstrates glaucoma induction in an anesthetized rat by injecting hypertonic saline into the episcleral vein. The saline enters the trabecular meshwork via Schlemm's canal, causing tissue scarring, which blocks aqueous humor outflow and raises intraocular pressure. The elevated pressure damages retinal ganglion cells, leading to glaucoma.
03:52
Subcutaneous Injection of Bacterial Antigen to Induce Systemic Inflammation in a Murine Model
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2025
This video demonstrates the induction of systemic inflammation in an anesthetized mouse. The injection of mycobacterial antigen-adjuvant depots triggers cytokine release and localized inflammation. Lymphatic vessels open, enabling immune cell entry into lymph nodes and activation of T cells, which release pro-inflammatory cytokines, leading to widespread inflammation.
05:50
Subcutaneous Neurotrophin 4 Infusion Using Osmotic Pumps or Direct Muscular Injection Enhances Aging Rat Laryngeal Muscles
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Cited by 7 •
2017
Here, we present a protocol to describe the use of neurotrophin 4 (NTF4) systemically and directly to remodel rat aging laryngeal muscles.
10:35
Generation of Subcutaneous and Intrahepatic Human Hepatocellular Carcinoma Xenografts in Immunodeficient Mice
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Cited by 15 •
2013
Human tumor xenografts in immunodeficient mice are valuable tools to study cancer biology. Specific protocols to generate subcutaneous and intrahepatic xenografts from human hepatocellular carcinoma cells or tumor fragments are described. Liver regeneration induced by partial hepatectomy in recipient mice is presented as a strategy to facilitate intrahepatic engraftment.
09:01
A Technique for Subcutaneous Abdominal Adipose Tissue Biopsy via a Non-diathermy Method
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Cited by 7 •
2017
We standardized an abdominal adipose tissue biopsy using a non-diathermy method performed under local anesthesia. Three cases of excessive post-operation bleeding out of 115 operations (2.61%) occurred.We conclude that an abdominal adipose tissue surgical biopsy using a non-diathermy method can be safely applied to healthy men.
FAQs
Its relatively isotonic composition allows the fluid to remain compatible with the surrounding interstitial environment as it disperses beneath the skin. From there, uptake into the circulation occurs progressively through the tissue rather than by direct deposition inside a blood vessel. This makes the route useful when gradual fluid availability matters.
Absorption depends on the saline formulation, the volume delivered, properties of the tissue receiving the injection, and the rate at which fluid moves away from the injection site. Changing any of these variables can alter local distribution and the timing of systemic availability, so they should be considered when comparing experimental outcomes.
Subcutaneous delivery places saline outside the vascular space, allowing surrounding tissue to mediate its movement into the circulation. Direct vascular administration bypasses that intermediate tissue phase. Consequently, subcutaneous experiments can examine gradual uptake and tissue-dependent absorption, whereas direct bloodstream delivery does not provide the same route-specific information.
The injection site provides the tissue environment through which saline must move before entering the circulation. Differences in tissue properties can therefore influence fluid distribution and uptake rate, even when the solution and nominal volume remain unchanged. Consistent site selection helps researchers interpret whether observed differences reflect the treatment or the delivery environment.
A basic procedure requires sterile sodium chloride solution and a needle capable of depositing the fluid in the subcutaneous space. The operator selects an appropriate volume and composition, places the needle beneath the skin without direct vascular delivery, and introduces the solution into the surrounding tissue for gradual uptake.
Saline can serve as a vehicle when another substance must be delivered through the same subcutaneous route, or as a control treatment for evaluating effects attributable to that substance rather than the injection process alone. Matching route and relevant fluid conditions supports clearer comparisons between treated and control groups.
Researchers can use the method to examine how a substance administered outside the bloodstream becomes available through surrounding tissue. By varying or recording solution composition, injection volume, tissue properties, and uptake rate, experiments can relate delivery conditions to absorption patterns and distinguish route-dependent effects from those produced by direct vascular administration.