What is a heparin lock?

Written by victoria ries
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What is a heparin lock?
(V. Ries Copyright 2008)

Heparin Locks, or Hep Locks, are small tubes attached to a catheter, inserted into the arm and held in place with tape in order to administer drugs and fluids without injecting patients multiple times unnecessarily. Emergency situations require an accessible vein fast; the Hep Lock provides that accessibility. Medicine may be injected easily, making life simple for nursing staff and less painful for patients.

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Function of a Hep Lock

Heparin Locks (HL) do not contain heparin (anticoagulant) unless used for a heparin flush; however, are used frequently by nurses to keep open a vein for easy access in order to administer drugs, saline, antibiotics or blood without causing unnecessary stress on the patient, while saving time. One of many advantages of using this method is that medication may be given without disturbing the patient while asleep.

Benefits of a Hep Lock

The heplock benefits women in labour in that quick access to a vein allows doctors to administer medication should the woman request an epidural (saddle-block) anaesthesia. Other emergencies may be quickly attended to such as caesarean section (c-section), or if suffering haemorrhage postpartum.

Time Frame for Using a Hep Lock

The Hep Lock may be inserted, taped and in use, in as little as three minutes, depending on the patient's type of vein. Some veins "roll" and are difficult to pierce and may take longer. Initial discomfort on insertion of the Hep Lock ultimately saves time, money and other labour-intensive procedures in the long run.

Considerations for Using a Hep Lock

Heparin is an anticoagulant used to prevent blood clots forming in the arteries, lungs or veins. Between uses of the Hep Lock, a nurse will inject heparin into the Hep Lock to be used as a flush to keep the vein from clotting, which would prevent medications from entering the bloodstream.

Significance of the Hep Lock

The drug, heparin, used as a flush between uses in the Hep Lock, is made from pig intestines. Nevertheless, many people in China suffered adverse effects from faux heparin, made instead from animal cartilage gathered in unsanitary conditions, which tested like heparin but had dire reactions and fatalities. Shortness of breath, fainting spells, rapid heartbeat, chest pain, unresponsiveness and low blood pressure stemming from contaminated heparin were experienced.

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