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It can be caused by inadequate blood volume or
inadequate ability to carry oxygen.
Bibliography
Ormaechea E. (2016). Shock hipovolémico. Recuperado de : https://www.salud.mapfre.es/enfermedades/cardiovasculares/shock-hipovolemico/

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Severe blood loss (hemorrhagic shock). External bleeding (for example, due to trauma) or internal bleeding (such as gastric bleeding from a stomach ulcer).

Loss of water and electrolytes (sodium and potassium): severe vomiting and diarrhea.

Loss of plasma : burns.

Bibliography
Ormaechea E. (2016). Shock hipovolémico. Recuperado de : https://www.salud.mapfre.es/enfermedades/cardiovasculares/shock-hipovolemico/

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Hypovolemic shock - Introduction & Causes

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Fast breathing

Palpitations due to increased heart rate

Confusion and dizziness due to altered level of consciousness

Cold and pale skin

Dry mucous membranes

Generalized weakness and malaise from low blood pressure

Decreased diuresis

Bibliography
Ormaechea E. (2016). Shock hipovolémico. Recuperado de : https://www.salud.mapfre.es/enfermedades/cardiovasculares/shock-hipovolemico/

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The diagnosis is based on the medical history and the signs that the patient presents and that include:

High heart rate: tachycardia

High respiratory rate: tachypnea

Arterial hypotension

Oliguria: decreased volume of urine emitted

The physical examination allows to detect these alterations and the medical questioning to determine the possible causes of shock.

Other useful complementary examinations are:

Analytical ( hemogram and biochemistry) that allows to determine the loss of blood, plasma and electrolytes (sodium and potassium).

Imaging tests such as ultrasound, CT (computerized axial tomography) and MRI (magnetic resonance imaging). Especially useful in those cases in which there are internal bleeding or organ damage.

Bibliography
Ormaechea E. (2016). Shock hipovolémico. Recuperado de : https://www.salud.mapfre.es/enfermedades/cardiovasculares/shock-hipovolemico/

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Volume replacement through the administration of blood and / or fluids intravenously . Liquid crystalloid or colloid solutions can be administered.

Sometimes the fluid intake is not enough to maintain a sufficient blood pressure to allow blood to reach the tissues and it is also necessary to use other drugs intravenously. The most used are dopamine and norepinephrine.

Bibliography
Ormaechea E. (2016). Shock hipovolémico. Recuperado de : https://www.salud.mapfre.es/enfermedades/cardiovasculares/shock-hipovolemico/

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IV fluids course (16) : IV fluids resuscitation in hypovolemic shock

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keep the patient stable and obtain permissive hypotension, that is, a sitolic blood pressure of 80-90 mmHg.

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Cause waterlogging by administering fluids quickly and without controlling vital signs.

If I have internal bleeding when I send a lot of liquid, I will not be able to control it, because there will be destruction of the clots.

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In all those situations in which there may be a significant loss of blood volume: dehydration due to intense heat, diarrhea, vomiting, etc. it is important to ensure an adequate supply of fluids .
Bibliography
Ormaechea E. (2016). Shock hipovolémico. Recuperado de : https://www.salud.mapfre.es/enfermedades/cardiovasculares/shock-hipovolemico/

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An example (case) of a short description of Hypovolemic shock 

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An example (case) of a short description of Hypovolemic shock 