What is polymeric microsphere?
Microspheres are polymeric micron range particles with sizes from 1 to 1000 µm (Table 10.1). These microspheres are used for drug delivery, wherein the drug can be encapsulated or entrapped form. Based on the polymeric composition of microspheres, they can be classified into two types: natural and synthetic.
What is microsphere in drug delivery?
Controlled drug delivery system (Microspheres) releases the drug in controlled rate and overcome the problems of conventional drug delivery system and enhances the therapeutic efficacy of a given drug 1.
Which polymer is used for controlled drug delivery?
Among the synthetic and biodegradable polymers, aliphatic polyesters such as poly (glycolic acid), poly (lactic acid), poly (caprolactone) and polydioxanone, are most commonly used and applied to drug delivery systems.
What are the advantages of albumin microspheres in drug delivery?
The following advantages make them a promising means for the delivery of NSAIDs. ✓ Albumin Microspheres provide constant and prolonged therapeutic effect. ✓ Reduces the dosing frequency and thereby improve the patient compliance. ✓ They could be injected into the body due to the spherical shape and smaller size.
What is magnetic microsphere?
Magnetic microspheres are supramolecular particles that are small enough to circulate through capillaries without producing embolic occlusion (<4μm)but are sufficiently susceptible (ferromagnetic) to be captured in micro-vessels and dragged into the adjacent tissues by magnetic field of 0.5-0.8 tesla [1,2].
What are ceramic microspheres?
Ceramic Microspheres are high-strength, inert fine particles with intrinsic hardness. 3M microspheres offer a number of advantages in paints and coating applications and are engineered to reduce costs, increase solids, enhance properties, and improve processability.
What are albumin based microspheres?
Albumin microspheres are colloidal particles which are known to sustain the release of entrapped therapeutic agent(s). The rate at which these particles metabolise in vivo can be manoeuvred by varying their synthetic conditions.
What dissolves albumin?
albumin, a type of protein that is soluble in water and in water half saturated with a salt such as ammonium sulfate.
How do microspheres grow?
Upon heating, the internal pressure created causes these microspheres to expand many times greater than their original sizes. They have ultra-low expanded densities ranging from 0.005 to 0.024 g/cc. They will expand to form low-density spheres, creating unique, and often improved, end-product properties.