This information is not meant to be a substitute for veterinary care.   Always follow the instructions provided by your veterinarian. 
In the photographs below, unless otherwise noted, the dog is facing to   your right.  Variations on these instructions exist. Always follow the instructions   provided by your veterinarian.
Supplies used in giving subcutaneous fluids will vary by manufacturer and   may differ from those pictured here.
Fluid given under the skin, subcutaneously (SQ), is absorbed into the   blood stream and can be used to correct or prevent dehydration. The most   frequent disease for which fluids are given is chronic kidney failure. Dogs   with chronic kidney failure pass large amounts of urine and may not feel   well enough to drink enough to prevent dehydration. The dog owner may give   subcutaneous fluids a few times a week to supplement the water the dog is   drinking in order to prevent dehydration and help flush waste products   through the kidneys.   
Your veterinarian will prescribe a certain type of fluids and a volume   and frequency for administration to your dog. The most common fluid type   given to dogs with chronic kidney failure is Lactated Ringers Solution   (LRS).   
There are 3 general techniques used to give SQ fluids:  
- with a syringe and needle     
 
- with a syringe, needle and flexible tubing called an extension set          
 
- from a vinyl bag using a solution drip set    
 
Most dogs  tolerate being given subcutaneous fluids. You can give about   10-20 ml per kg of body weight (5 -10 ml per pound)  in one spot (e.g. 50 ml   for a 10 pound dog) before you move to another location.  It usually takes 6   to 8 hours for all the fluids to be absorbed. Check to see if the previously   administered fluids have been absorbed before giving more fluids. Even   though the fluids are given on the back, gravity will cause the fluids to   accumulate on the belly, so check for residual fluids on the belly before   you give more. Check with your veterinarian if the fluids are not being   fully absorbed.
Usually the skin is 
not cleansed before inserting the needle. If   the dog has a normal immune system, the few bacteria that are pushed under   the skin with the needle will be killed by the dog's immune system.
You can use alcohol on a cotton ball to make the hair lay flat so it is   easier to see where the hair ends and the skin starts. Alcohol takes about   30 minutes before bacteria are killed, so just swiping the hair with alcohol   is not an effective way to kill bacteria.
If your dog may have an abnormal immune system, for example is on anti   cancer drugs, then several patches of hair may be shaved and the injection   sites scrubbed with an antiseptic solution such as Novalsan or   Betadine       before placing the needle to prevent pushing bacteria under the skin.
   
                  |      The thickness of a needle is      measured by gauge (g), the smaller the number, the thicker the      needle. An 18 gauge needle is thicker than a 20 gauge needle.      Needles may also be different lengths, one-inch and one and      one-half-inch are most commonly used.            |     
 The plastic hub is the wide part of the needle that attaches to the syringe.   The hub of the needle is color coded by size, although these colors may vary   by manufacturer. 18g needles have a pink hub, 20g needles have a yellow hub.   20g needles are most commonly used to give SQ fluids although larger needles   (18g) may be used in large dogs and may be used to draw fluid from the   container of fluids. Smaller needles (22g) may be recommended for small   dogs.
   
                 |      Needles are packaged in a rigid      plastic cover and wrapped in paper or plastic to keep them      sterile. Keep the needles in the original package until use. Do      not dispose of needles or syringes in the trash. Keep used      needles and syringes in a puncture-proof container and return      them to your veterinarian for disposal.Don't use the same      needle that was placed under the skin to draw more fluids from      the container of fluids or bacteria will be introduced into the      container of sterile fluids. 
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 If you use an 18g (pink) needle to draw from the solution container and a   20g (yellow) needle to give the fluids, it will be easier to keep track of   which needle to use. Keep the white plastic cap to place over the sharp   needle when it is not in use.    
   
            
       |      Usually a large (60 ml) syringe is      used for fluid delivery. The syringe is often packaged in a      plastic case. If the syringe is to be used more than once, you      may want to keep the container. The plastic container is also      useful for placing used needles for disposal.          |     
         
                 |      The syringe has 2 parts, a barrel      and a plunger.             |     
         
                 |      The syringe is marked in      milliliters (ml) and ounces. The syringe is marked at 5 ml      increments (5 ml, 10 ml, 15 ml, etc.). Each line between the      numbers is 1 ml. The plunger has a domed end. The top edge of      the plunger is used to read the amount of fluid in the syringe.      This syringe contains 26 ml of fluid. 
There is a small air bubble in this syringe. It is not      necessary to remove tiny air bubbles such as this one when you      are giving fluids SQ.                   |     
         
                 |      Remove the needle from the      paper/plastic wrap but leave the plastic cover on the needle.      Place the hub of the needle firmly over the tip of the syringe.      Some needles and syringes have threads that screw together      (luer-lock).Remove the plastic needle cap just before use.                |     
         
                 |      Fluids are in plastic bags or      glass bottles. Bags of fluids come packaged in a plastic      wrapper. Remove the wrapper from the plastic bag just before      using. The fluid type that is most often given SQ is Lactated      Ringers Solution (LRS). Fluids do not contain a preservative,      so ideally they should only be used only once and then any      remainder should be discarded. Most veterinarians stock fluids      in 1,000 ml bags. This volume is larger than is usually given to      a dog at one time. You may be given instructions to draw fluids      from the same bag for a few days. See the      instructions below          for suggestions on how to prevent contamination of the bag of      fluids. 
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                 |      The neck of the bag of fluids has      2 ports; the injection port that is covered with a rubber      stopper and a port covered by plastic (blue) in which the spike      of a solution set is inserted (discussed below). |     
    
                            |      Follow your      veterinarian’s instructions for handling the fluids sterilely so      the container of fluids is not contaminated, and you may be able      to use the same container of fluids for a few days if      recommended by your veterinarian. Clean the rubber stopper of      the injection port with an antiseptic solution such as Novalsan      (chlorhexadine) or Betadine          (povidone iodine) before inserting the needle, if more than one      puncture will be made through the stopper. 
Alcohol takes about 30 minutes of contact before bacteria are      killed, so it is not a good solution to use. 
Always use a sterile needle to draw fluids from the sterile      container. Do not use the same needle to give the fluids to the      dog, and then place that needle back into the fluid container as      it will become contaminated with bacteria from the skin. 
If you use an 18g (pink) needle to draw from the solution      container and a 20g (yellow) needle to give the fluids, it will      be less confusing. 
Never use a bag of fluids if it appears cloudy. 
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                 |      Remove the plastic cap from the      needle and place the tip of the needle in the injection port. |     
    
                 |      The needle must be inserted into      the center of the rubber stopper. The injection port itself is      held so the needle is inserted straight          into the injection port. |     
                  
 |                  This needle is properly aligned. 
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                 |      This needle is placed off-center      and is puncturing the injection port. |     
    
                 
       |      Draw back on the syringe plunger      while holding the syringe barrel steady so the needle does not      pull out of the fluid bag. Fill the syringe to the volume      prescribed by your veterinarian. Do not fill a 60 ml syringe      past 50 ml as the plunger may accidentally be pulled out of the      barrel of the syringe, spilling the fluid. 
If you used an 18g needle to draw from the bag, replace the      plastic cap, remove from the syringe, and set aside this      needle.             
           |     
    
                 |      Replace the 18 g needle with a 20g      needle. When you have given the first syringeful of fluids,      change back to the 18g needle to draw another syringeful. Then      change back to the 20g needle to inject the dog. Keep the      plastic caps on the needles as you exchange them. Use one new      18g and one new 20g needle each time you give fluids to your      pet; alternating needles between syringefuls of fluids.  |     
    
                 |      Pinch up a fold of skin anywhere      along the neck or  back using your left hand if you are      right-handed.Use your right hand to place the needle that is      attached to a 60 ml syringe, into the skin fold along the long      axis of the fold. 
If you place the needle in the opposite direction, across the      skin fold, it is more likely that the needle will go through one      fold of skin and out the other fold of skin.               
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                 |           Before injecting the fluid, pull back on the plunger of the      syringe. If air bubbles appear in the syringe, the needle has      gone through both folds of skin and you are sucking room air      into the syringe. Remove the needle from the skin and try again. 
If you get blood, the tip of the needle is in a blood vessel.      Remove the needle and try again. 
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                   |      Once you have checked that the      needle is correctly placed, let go of the skin fold and push the      plunger to inject the fluids.            The plunger can be pushed using one hand by holding the      syringe between your fingers and pushing the plunger with the      thumb of the same hand.  The other hand can be used to steady      the syringe or comfort the pet. 
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                 |      If this is difficult, hold the      syringe in one hand and push the plunger with the other. The      fluids can be injected as fast as you can push the plunger. 
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                 |      If the needle is not directly      attached to the syringe, but is attached to a flexible piece of      tubing (an extension set) first, the dog can move around a bit      while the fluids are being injected.The extension set will be      packaged in a plastic/paper wrapper. Remove from wrapper, remove      the white plastic cap from one end and firmly place on the tip      of the syringe. Remove the cap on the other end and place into      the hub of the needle. 
The two ends are different, the female end fits over the tip      of the syringe. The male end fits into the hub of the needle.          |     
    
                 |      The needle attached to the      extension set is inserted into the injection port      as described above for a needle directly attached to a      syringe. Draw the prescribed amount of fluids into the syringe.      Replace the 18g needle with a 20g needle and recap the 18g      needle with the plastic needle cap.Push some of the fluid      through the tubing to evacuate air from the tube, a procedure      called priming.          |     
                      
 |              The syringe containing the fluids is laid on the table. 
Pinch up a fold of skin anywhere along the neck and back      using your left hand if you are right-handed.            
Use your right hand to place the needle into the skin fold      along the long axis of the fold. 
Pull back on the plunger of the syringe. If air bubbles      appear in the syringe, the needle has gone through both folds of      skin and you are sucking room air into the syringe. Remove the      needle from the skin and try again. 
If you get blood, the tip of the needle is in a blood vessel.      Remove the needle and try again. 
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 |                  Once you have checked that the needle is correctly placed,      let go of the skin fold and push the plunger to inject the      fluids. The plunger can be pushed using one hand by holding the      syringe between the index finger and middle finger and pushing      the plunger with the thumb of the same hand.  
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 |                  If this is difficult, hold the syringe in one hand and push      the plunger with the other. The yellow X marks the site the      needle is entering the skin. 
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                 |      When you are finished giving      fluids, if you are instructed to use the same syringe and      extension set for more fluids later, place a clean needle      covered by its plastic cover on the end of the extension set. |     
    
                 |      The third method to give SQ fluids      is to attach a solution drip set to a bag of fluids.Remove      the solution set from the plastic/paper wrapper. Both ends are      covered with plastic caps. After removing the cap, the male end      fits into the hub of the needle. The white spike is punctured      into the spike port of the bag of fluids after removing the      plastic tube that covers the spike.                   |     
                             
 |                  The spike port on the bag of fluids is covered by a blue      plastic cover. This cover is pulled off. The cover is tightly      covering the spike port and you have to pull firmly to remove      it. 
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 |                  The white spike on the solution set is      pushed into the spike port. Hold the spike port in your left      hand to guide the spike straight into the port. If you push the      spike in at an angle, it may puncture the bag of fluids. 
           |     
                             
 |                  Attach a needle to the other end of the solution set. 
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                 |      The plastic tubing has 2 clamps      that must be opened to allow fluid to flow. - The dark blue pinch clamp has a tapered slot, the tubing       is pushed to the widest part of the slot to open and pushed       to the narrowest part of the slot to stop fluid flow
 
- The light blue clamp is a roller clamp. Use your thumb       to roll the white disk up, toward the solution chamber to       open and in the opposite direction to close. 
 
 The fastest flow of fluids occurs with both clamps fully      open. 
Before placing the needle in the SQ, open the clamps and let      fluid flow until the air is evacuated from the tubing. 
You will see drops of fluid drop in the drip chamber when the      clamps are open. If the drip chamber fills with fluid so that      you cannot see the drops forming, turn the drip chamber upside      down and squeeze some of the fluids back into the bag.           |     
                        
 |                  The skin is tented and the needle inserted along the long      axis of the fold. You cannot suck back to check for air so watch      the site at which the fluids are entering the skin fold to make      sure the hair isn't getting wet suggesting the needle is      incorrectly placed. 
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 |                  The fluids can be dripped into the SQ space as fast as the      drip will go. The higher you hang the bag, the faster the fluids      will flow. 
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              |     You can also roll up the bag and     squeeze the fluids out of the bag for faster delivery.If you are     instructed to use the same fluids and solution set for more fluids     later, place a clean needle covered by its plastic cover on the end     of the solution set. 
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Complications of SQ fluid administration can include:
- development of an abscess which will be a hard, painful lump that is    warm to the touch
 
- edema if too much fluid is given
 
- if the dog is severely dehydrated, the fluids will not be absorbed