Assessing distal circulation is a valuable evaluation modality in patient care. This refers to the skin, blood, and nerves that connect to the rest of the body’s organs and systems.
This includes assessing veins, arteries, and nerves that travel to these areas, such as arteries that transport blood to the skin. In addition, evaluating these areas for signs of bleeding and disease is important.
In terms of pulse assessment, there are two main ways to look at a person’s pulse. The first is called numerical assessment and the second is called qualitative assessment. This article will discuss both of these.
The first type of assessment is described as numerical. This refers to looking at a patient’s Pulse Unit (PV) against a scale to see if it increases or decreases over time.
Central pulse
When assessing a patient’s distal circulation, which means the areas adjacent to the legs and feet, you should also consider the central pulse.
The central pulse is a subtle vein that runs along the surface of the legs and feet. The central pulse helps tell you when an area is warm or hot.
When evaluating an extremity, you can look for a whitish white spot at the top of the foot or an increase in size of the ankle cap. These clues are similar to a heat stroke diagnosis such as hyperthermia, acute tubular death syndrome (Thompson syndrome), or drug-induced thermal shift (Drug-Induced Vasovagal Syncope).
You can also look for a whitish white spot at the bottom of the foot or an increase in diameter of footplate.
Femoral pulse
The femoral pulse is a stream of blood flowing through the upper leg and back. This pulse can be valuable in assessing distal circulation.
It can be evaluated in both healthy and diseased extremities. As opposed to the radial and cosmetically useful vein pulses, the femoral pulse is slightly more prominent.
When evaluating a patient with lower extremity pain, the femoral pulse is usually palpated on the inside of the leg just above the ankle. A small amount of blood can be found resting within this pocket of blood. This is called a __red spot__.
This indicates that there is some healthiness to the area being affected. If there is also swelling present, then additional pressure may be applied onto this pocket to ensure that enough blood gets into the afflicted area.
Popliteal pulse
The popliteal pulse is a low-pulsation pulse found in the feet. This pulse can be observed when the patient is standing with his or her weight supported by the two front feet and the one rear foot is placed on a surface. The patient’s body appears to be balanced by the movement of the two front feet and the one rear foot.
The popliteal pulse is considered an asset to patients because it helps gauge how much blood they are losing through their feet. A lower popliteal pulse indicates more blood loss, which may be occurring throughGeneralized Vascular Disease (GVD) or decreased perfusion due to reduced blood flow.
Assessing a patient’s popliteal pulse can be difficult, which is why it is important to have access to a tool such as an assessable device.
Dorsalis pedis pulse
The dorsalis pedis (or less commonly, dorsalis posterior) is an artery located in the lower extremity. It constitutes the second longest blood vessel in the human body behind the aorta.
The dorsalis pedis artery is named after its location on the feet – it flows on the bottom of feet and toes, where it joins the aortal branch of the femoral artery.
The term dorsi-palpable refers to what makes a patient able to feel their ankle or foot – it is specifically the dorsalis pedis artery that is perceived as a warm, soft pressure on top of that area.
When assessing distal circulation in a patient’s lower extremity, which pulse should you palpate? The answer may vary based on why you are evaluating this patient.
Pulmonary artery pressure
When assessing a patient’s distal circulation, you should be able to palpate the pulmonary artery pressure. This is the pressure in the arteries in and around the heart that carries blood to the rest of the body.
The pulmonary artery pressure is important to note, as it differs from other blood pressures in the body. For instance, when evaluating an elderly patient with low blood sugar, you can evaluate the pulmonary artery pressure to determine if there is sufficient supply of blood to keep glucose levels up.
You can also use this as a baseline check for any surgery or treatments, as it can change with time. For instance, if someone has a heart valve replacement, then their new valve may not have enough pressure against it to hold up under repeated pounding.
Capillary refill time
When assessing a patient’s distal circulation, such as the thigh or lower extremity, you should palpate the pulse. The pulse is an indicator of the amount of blood that is circulating through the body.
A normal sounding pulse can be counted as one zero or 10 in a graded scale. A slightly elevated or depressed pulse can be counted as one minus one or zero in a graded scale.
In patients with low blood pressure, a slight depression in the pulse can easily be overlooked. However, if the patient has IV access and needs to be checked herself, then a quick and accurate assessment of the pulse is imperative.
There are many ways to calculate how often a patient has had a blood draw. One way is to take their capillary refill time and count from zero to five minutes. So, if their capillary refill time was three minutes, that would be three blood draws over five-months-on.
Skin color and temperature
When assessing skin color or temperature in patients, there are a couple of things to consider. Skin color is dependent on blood flow and tissue distribution. Tissue distribution, or where a procedure is performed, determines whether a procedure such as an ambulatory guided ambulation (AGA) or wheelchair transfer is required.
Ambulatory procedures such as aguided ambulation or wheelchair transfer require greater distance traveled during the assessment process. For this reason, areas of warmth or firmness such as a massage table or recliner pillow that have been deposited in a patient’s lap or back may be examined for heat production.
Finally, in cases where surgery is required, check for any cool spots to determine if surgery must be postponed due to cooling effects.
Presence of edema
When assessing a patient’s distal circulation, you should be careful to note the presence of edema. Edema can be an indicator of a problem, such as poor blood flow or retention of fluid in tissues.
Edema occurs when fluid is pools in the area around a major blood vessel. When this happens, it can look like a bursting fat balloon, which appears pale and floating. This looks extremely cool!
Some fats tend to float better than others. If you take a piece of fat and place it on your stomach, for example, the part that touches will probably float better than the part that does not.
Similarly, if you place the piece on your leg, the one that touches mustners have to be more secure in order for it to stay afloat.
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