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Saline Lock


Why is this procedure done?


A saline lock is an intravenous line or I.V. line that is capped off instead of connecting to I.V. fluids. It may also be called a heparin lock or hep lock. A saline lock is connected to the outside of the I.V. catheter. It is flushed with a special fluid called saline. You may need a saline lock: ‚  
  • To get drugs through an I.V.
  • In case you need I.V. fluids or I.V. drugs again.
  • For quick access in an emergency.

What will the results be?


With a saline lock, you will not need to be connected to I.V. fluids all of the time. You may be able to move your arm more freely. You will still have I.V. access for drugs and fluids if you need them. ‚  

What happens before the procedure?


Your doctor will take your history and do an exam. Talk to the doctor about: ‚  
  • All the drugs you are taking. Be sure to include all prescription and over-the-counter (OTC) drugs, and herbal supplements. Tell the doctor about any drug allergy. Bring a list of drugs you take with you.
  • If you are not able to have drugs that make you numb. These drugs are used when you have stitches or dental work (Lidocaine, Xylocaine, or Novocain).
  • Any bleeding problems. Be sure to tell your doctor if you are taking any drugs that may cause bleeding. Some of these are Coumadin, ibuprofen, Aleve (naproxen), or aspirin. Certain vitamins and herbs, such as garlic and fish oil, may also add to the risk for bleeding. You may need to stop these drugs as well. Talk to your doctor about them.

What happens during the procedure?


  • You will lay your arm on a table, bed, or pillow.
  • The area on the arm or hand will be cleaned with alcohol or other special cleanser to kill germs.
  • You may be given a drug in or on your arm or hand to make the area numb where the saline lock is going to be placed.
  • A tight band may be placed around your arm.
  • The staff may use an ultrasound machine if they have problems seeing your veins.
  • A saline lock is placed just like a regular I.V. When the procedure is done, the saline lock is flushed with salt water called saline. A cap is placed on the end of the I.V. This helps to keep the ends clean and helps keep germs out.
  • You will have a special bandage over your saline lock. This keeps it clean and keeps the I.V. from moving.
  • The staff will write the date on or near your bandage once the I.V. is put in.
  • The procedure will take 10 to 15 minutes.

What happens after the procedure?


Your saline lock may have fluid pushed through it a few times a day to make sure it is working well. You may also have drugs given through your saline lock. ‚  

What follow-up care is needed?


  • It is important to keep the dressing dry and clean.
  • Tell the staff if you have any burning or pain around your I.V.
  • You may need to have this I.V. changed after 72 hours. It may also need to be changed if it becomes painful and does not let fluids run through. This is to lower the chances of infection.

What problems could happen?


  • Redness, swelling, pain, or drainage from the insertion site. This might mean the site is infected.
  • Unable to flush I.V. catheter
  • Catheter may become dislodged

Consumer Information Use and Disclaimer


This information is not specific medical advice and does not replace information you receive from your health care provider. This is only a brief summary of general information. It does NOT include all information about conditions, illnesses, injuries, tests, procedures, treatments, therapies, discharge instructions or life-style choices that may apply to you. You must talk with your health care provider for complete information about your health and treatment options. This information should not be used to decide whether or not to accept your health care providers advice, instructions or recommendations. Only your health care provider has the knowledge and training to provide advice that is right for you. ‚  

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