How to do Intraperitoneal (IP) injection?
Methods:
Intraperitoneal injection has been widely used for mouse anesthesia or drug administration. A mouse is manually restrained with the right hind limb immobilized and the head and body tilted downward. The right lower abdominal wall is disinfected with 70% ethanol. A 25 – gauge or smaller needle is quickly inserted into the peritoneal cavity in the caudal right abdominal quadrant through the skin and the abdominal wall, thereby avoiding injection into the cecum or the stomach on the left side. The needle tip is then lifted slightly and the material is delivered.
Handling and Restraint
Although there are significant species differences when handling and restraining an animal, there are several important concepts that apply equally to all species. These include:
Handle animals gently but firmly.- Approach an animal slowly but purposefully.
Wear disposable gloves whenever possible. Always wash your hands prior to and after handling as odors of other species or blood is frequently distressing, and your hands can act as a means of spreading infectious agents from one group of animals to another. Wear a clean laboratory coat for the same reasons as discussed above. Use an appropriate method.
Animals to be used in experimental protocols which involve extensive manipulation should be handled frequently before the onset of the study to allow the animal to acclimate to your scent making them more docile while restrained. Within species, particular stocks or strains of animal may have distinctive behavioral responses.
MICE
Adult mice are picked up by the tail by compressing the base of the tail between the thumb and forefinger and gently placing the animal onto a solid surface. Rest the animal on the dorsal aspect of your forearm and transport it short distances. Alternatively, the animal can be placed in a small container with a cover containing holes that admit in air. Adult mice can also be picked up by grasping the loose skin over the shoulders and gently lifting the animal from its cage or, alternatively, a pair of forceps (toothless) can be used to grasp the mouse by either the tail or the skin over the shoulders.
For restraint the mouse is picked up by the tail as described above and is placed over the wire bar lid of the cage and lowered until the mouse grasps the wire with its forefeet. The excess skin over the animal's back is grasped between your thumb and forefinger, the hand is rotated so that the mouse is lying on its back within the palm of the hand. The animal's head is closest to your thumb while the tail is grasped with your smallest finger. The result is a mouse that is immobilized for examination or manipulation.
Devices are available to restrain mice for a variety of procedures. Commercially available plexiglass restraining cylinders provide access to the animal's tail for intravenous injection or blood collection. Home-made devices can be made out of plastic syringe casings.
Conical plastic sleeves, referred to as Decapicones®, can also be used. The plastic is approximately the same thickness as that of plastic waste bags. The flexible transparent clear-plastic sleeve is conical, is open at its base, and has a small breathing hole at the apex. The mouse is slid into the cone through the base with its nose resting adjacent to the breathing hole. The excess plastic is gathered and a rubber band is placed around the animal's tail and the plastic of the cone. The cone permits access to the tail and also, if the animal is positioned properly, will permit parenteral injections through the thin-walled plastic. Alternatively, the wire bar lid from a shoebox cage which contains a food trough can be used to restrain a mouse to provide access to its tail. The wire bar lid is set on a solid surface so that it rests on the angular food trough. The mouse is directed between the food trough and the end of the wire bar lid which is resting on the top's surface. The mouse's tail is directed between the wire bars and gently pulled so that the animal's rear end is held firmly against the lid. This method provides access to the tail, while limiting the mouse's ability to turn around and bite.


LinkBack URL
About LinkBacks






Carpe dime . seize the day
پاسخ با نقل قول

علاقه مندی ها (Bookmarks)