Goal-directed Therapy
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Early goal-directed therapy (GDT) was introduced by Emanuel P. Rivers in ''
The New England Journal of Medicine ''The New England Journal of Medicine'' (''NEJM'') is a weekly medical journal published by the Massachusetts Medical Society. It is among the most prestigious peer-reviewed medical journals as well as the oldest continuously published one. His ...
'' in 2001 and is a technique used in
critical care medicine Intensive care medicine, also called critical care medicine, is a medical specialty that deals with seriously or critically ill patients who have, are at risk of, or are recovering from conditions that may be life-threatening. It includes pro ...
involving intensive monitoring and aggressive management of
perioperative The perioperative period is the time period of a patient's surgical procedure. It commonly includes ward admission, anesthesia, surgery, and recovery. Perioperative may refer to the three phases of surgery: preoperative, intraoperative, and posto ...
hemodynamics in patients with a high risk of
morbidity A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not immediately due to any external injury. Diseases are often known to be medical conditions that a ...
and mortality. In cardiac surgery, goal-directed therapy has proved effective when commenced after surgery. The combination of GDT and
Point-of-Care Testing Point-of-care testing (POCT or bedside testing) is defined as medical diagnostic testing at or near the point of care—that is, at the time and place of patient care. This contrasts with the historical pattern in which testing was wholly or most ...
has demonstrated a marked decrease in mortality for patients undergoing congenital heart surgery. Furthermore, a reduction in morbidity and mortality has been associated with GDT techniques when used in conjunction with an
electronic medical record An electronic health record (EHR) is the systematized collection of patient and population electronically stored health information in a digital format. These records can be shared across different health care settings. Records are shared throu ...
. Early goal-directed therapy is a more specific form of therapy used for the treatment of severe
sepsis Sepsis, formerly known as septicemia (septicaemia in British English) or blood poisoning, is a life-threatening condition that arises when the body's response to infection causes injury to its own tissues and organs. This initial stage is follo ...
and septic shock. This approach involves adjustments of
cardiac The heart is a muscular organ in most animals. This organ pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to t ...
preload, afterload, and contractility to balance oxygen delivery with an increased oxygen demand before surgery. Three trials published in 2014/2015 have shown that early goal directed therapy should be abandoned.


Evidence

EGDT, as compared to usual modern care, does not appear to improve outcomes but results in greater expense.


Elements

In the event of
hypotension Hypotension is low blood pressure. Blood pressure is the force of blood pushing against the walls of the arteries as the heart pumps out blood. Blood pressure is indicated by two numbers, the systolic blood pressure (the top number) and the dias ...
and/or lactate greater than 4 mmol/L, initial management includes a minimum fluid challenge of 30 ml/kg of crystalloid solution. Crystalloid solutions are recommended over colloid solutions given the cost and lack in difference of mortality benefit. Albumin may be considered if large amounts of crystalloid solution is needed. Indications of a positive response to fluid resuscitation may include: * a transient increase in
central venous pressure Central venous pressure (CVP) is the blood pressure in the venae cavae, near the right atrium of the heart. CVP reflects the amount of blood returning to the heart and the ability of the heart to pump the blood back into the arterial system. CVP ...
(CVP) * a decrease in heart rate If hypotension persists despite fluid resuscitation (septic shock) and/or lactate > 4 mmol/L (36 mg/dl), goals in the first 6 hours of resuscitation include: *Achieve CVP of 8-12 mmHg. Mechanical ventilation, increased abdominal pressure, and preexisting impaired ventricular compliance may require higher CVP targets of 12-15 mmHg *Achieve superior vena cava oxygen saturation (ScvO2) of > 70% OR mixed venous oxygen saturation (SvO2) of > 65%. If initial fluid resuscitation fails to achieve adequate oxygen saturation additional options include
dobutamine Dobutamine is a medication used in the treatment of cardiogenic shock (as a result of inadequate tissue perfusion) and severe heart failure. It may also be used in certain types of cardiac stress tests. It is given by IV only, as an injection in ...
infusion (maximum 20 µg/kg/min) or transfusion of packed
red blood cell Red blood cells (RBCs), also referred to as red cells, red blood corpuscles (in humans or other animals not having nucleus in red blood cells), haematids, erythroid cells or erythrocytes (from Greek ''erythros'' for "red" and ''kytos'' for "holl ...
s to a
hematocrit The hematocrit () (Ht or HCT), also known by several other names, is the volume percentage (vol%) of red blood cells (RBCs) in blood, measured as part of a blood test. The measurement depends on the number and size of red blood cells. It is norm ...
≥ 30%. If a ScvO2 is unavailable, lactate normalization may be used as a surrogate marker. A reduction in lactate by ≥ 10% is noninferior to achieving a ScvO2 of ≥ 70% *Achieve
mean arterial pressure In medicine, the mean arterial pressure (MAP) is an average blood pressure in an individual during a single cardiac cycle. MAP is altered by cardiac output and systemic vascular resistance. Testing Mean arterial pressure can be measured dire ...
(MAP) ≥ 65mmHg The presence of
atherosclerosis Atherosclerosis is a pattern of the disease arteriosclerosis in which the wall of the artery develops abnormalities, called lesions. These lesions may lead to narrowing due to the buildup of atheroma, atheromatous plaque. At onset there are usu ...
or pre-existing uncontrolled hypertension may necessitate a higher MAP target. *Achieve
urine Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excretion, excreted from the body through the urethra. Cel ...
output ≥ 0.5 mL/kg/h


References

{{Intensive care medicine Intensive care medicine