Femoral Artery Pulse

The femoral artery pulse, commonly called the femoral pulse, is the palpable arterial pulsation of the femoral artery in the upper anterior thigh. It is usually examined immediately inferior to the inguinal ligament, near the midinguinal point, where the artery is relatively superficial.^[1][2]

The femoral artery is the principal arterial vessel supplying the lower limb. It begins as the continuation of the external iliac artery after that vessel passes deep to the inguinal ligament and enters the femoral triangle.

Because of its large caliber and accessible position, the femoral artery produces a strong pulse that can usually be palpated readily. Examination of the femoral pulse is useful for assessing proximal arterial flow to the lower limb and comparing circulation between the two sides.

Location

The femoral pulse is palpated in the upper anterior thigh, immediately inferior to the inguinal ligament.

The most important surface landmark is the midinguinal point, located halfway between the anterior superior iliac spine and the pubic symphysis.

The femoral artery passes deep to the inguinal ligament near this point and enters the femoral triangle, where it is relatively superficial and accessible to palpation.

General Anatomy

Feature	Anatomy
Pulse	Femoral pulse
Artery palpated	Femoral artery
Location	Upper anterior thigh
Primary landmark	Midinguinal point
Proximal continuation	External iliac artery
Distal continuation	Popliteal artery after passage through the adductor hiatus
Major region	Femoral triangle
Clinical use	Assessment of lower-limb arterial circulation

Femoral Artery

The femoral artery is the continuation of the external iliac artery distal to the inguinal ligament.

It enters the thigh within the femoral triangle and descends through the anterior and medial thigh. At the apex of the femoral triangle, it continues into the adductor canal.

After passing through the adductor hiatus in adductor magnus, the vessel enters the posterior knee region and becomes the popliteal artery.

Origin

The external iliac artery becomes the femoral artery as it passes deep to the inguinal ligament.

This transition occurs approximately at the midinguinal point and marks the entrance of the principal arterial supply of the lower limb into the thigh.

The artery initially occupies a superficial position within the femoral triangle before descending more deeply through the thigh.

Midinguinal Point

The midinguinal point is located halfway between the anterior superior iliac spine and the pubic symphysis.

The femoral artery passes deep to the inguinal ligament near this point, making it the principal surface landmark for locating the femoral pulse.

The midinguinal point is clinically important in vascular examination, arterial access, and anatomical localization of the femoral vessels.

Midinguinal Point and Midpoint of the Inguinal Ligament

The midinguinal point should not be confused with the midpoint of the inguinal ligament.

Landmark	Definition
Midinguinal point	Halfway between the ASIS and pubic symphysis
Midpoint of inguinal ligament	Halfway between the ASIS and pubic tubercle

The femoral artery is related to the midinguinal point, whereas the midpoint of the inguinal ligament is a different surface landmark.

Inguinal Ligament

The inguinal ligament extends from the anterior superior iliac spine to the pubic tubercle.

The femoral artery passes deep to this ligament as it enters the thigh. The pulse is sought immediately inferior to the ligament rather than directly over or superior to it.

The inguinal ligament therefore provides an important transverse surface reference for locating the proximal femoral artery.

Femoral Triangle

The proximal femoral artery lies within the femoral triangle, a triangular anatomical region of the upper anterior thigh.

The boundaries of the femoral triangle are:

• Superiorly: inguinal ligament
• Laterally: medial border of sartorius
• Medially: medial border of adductor longus

The artery enters near the superior boundary and travels toward the apex of the triangle.

Relationship to the Femoral Nerve and Vein

Immediately inferior to the inguinal ligament, the principal neurovascular structures have a predictable lateral-to-medial arrangement.

• Femoral nerve
• Femoral artery
• Femoral vein
• Femoral canal and lymphatics

The femoral nerve therefore lies lateral to the artery, while the femoral vein lies medial to it near the inguinal ligament.

Femoral Sheath

The proximal femoral artery is enclosed within the femoral sheath, a fascial sleeve extending inferiorly from the abdominal and pelvic fascia.

The sheath contains the femoral artery, femoral vein, and femoral canal in separate compartments.

The femoral nerve lies outside the femoral sheath, lateral to the artery.

Relationship to the Femoral Head

The proximal femoral artery lies anterior to the region of the femoral head.

This deep bony relationship is clinically important because the artery can be compressed against underlying structures in the groin when temporary control of arterial blood flow is required.

The relationship also has importance during femoral arterial access because puncture level influences the ability to obtain effective compression after a procedure.

Palpation

The femoral pulse is usually palpated with the patient lying supine and the hip relaxed.

The examiner identifies the approximate midinguinal point and places the fingertips immediately inferior to the inguinal ligament.

Moderate pressure is directed posteriorly until the arterial pulsation is felt.

Palpation Technique

1. Position the patient supine with the lower limb relaxed.
2. Identify the anterior superior iliac spine and pubic region.
3. Estimate the midinguinal point.
4. Place the pads of the fingers immediately inferior to the inguinal ligament.
5. Apply gentle to moderate posterior pressure.
6. Identify the strongest arterial pulsation.
7. Compare the pulse with the opposite side when appropriate.

Pulse Characteristics

The femoral pulse can be assessed for several characteristics, including:

• Presence or absence
• Rate
• Rhythm
• Amplitude
• Symmetry between sides
• Timing relative to other pulses

Findings should be interpreted in the context of the overall cardiovascular and peripheral vascular examination.

Branches of the Femoral Artery

The femoral artery gives rise to several branches in the proximal thigh.

These include:

• Superficial epigastric artery
• Superficial circumflex iliac artery
• Superficial external pudendal artery
• Deep external pudendal artery
• Profunda femoris artery

The profunda femoris artery is the major deep branch and provides much of the arterial supply to the thigh.

Profunda Femoris Artery

The profunda femoris artery, also called the deep artery of the thigh, usually arises from the femoral artery within the femoral triangle.

It passes posteriorly and deeply in the thigh and gives rise to the medial and lateral circumflex femoral arteries and perforating branches.

The femoral artery itself continues distally toward the adductor canal.

Course Through the Thigh

From the femoral triangle, the femoral artery descends toward the apex of the triangle and enters the adductor canal.

Within the canal, it travels through the middle portion of the thigh with the femoral vein and related neural structures.

The artery eventually passes through the adductor hiatus and enters the popliteal fossa.

Relationship to Other Lower Limb Pulses

The femoral pulse is the most proximal of the major routinely examined arterial pulse points in the lower limb.

Pulse	Typical Location
Femoral	Inferior to inguinal ligament near midinguinal point
Popliteal	Deep within popliteal fossa
Posterior tibial	Posterior and inferior to medial malleolus
Dorsalis pedis	Dorsum of foot, usually lateral to extensor hallucis longus tendon

Sequential examination of these pulse points can help determine the approximate level at which arterial flow becomes reduced.

Femoral-Popliteal Relationship

The femoral and popliteal arteries are continuous components of the same major arterial pathway.

The femoral artery becomes the popliteal artery after passing through the adductor hiatus.

A palpable femoral pulse with reduced or absent distal pulses may therefore indicate impaired arterial flow somewhere distal to the proximal femoral artery.

Femoral-Dorsalis Pedis Relationship

Blood reaching the dorsalis pedis artery ultimately originates through the femoral arterial pathway.

The femoral artery continues as the popliteal artery, which divides into the anterior and posterior tibial arteries. The anterior tibial artery then continues onto the dorsum of the foot as the dorsalis pedis artery.

Comparing proximal and distal pulses provides useful anatomical information about arterial circulation through the limb.

Femoral-Posterior Tibial Relationship

The posterior tibial artery arises from the distal arterial pathway below the knee and supplies the posterior leg and plantar foot.

Comparison of the femoral and posterior tibial pulses can therefore help assess arterial flow from the proximal thigh to the distal limb.

A normal proximal pulse does not necessarily indicate normal circulation in more distal arteries.

Clinical Significance

Peripheral Vascular Examination

The femoral pulse is an important component of the peripheral vascular examination.

It is assessed together with the popliteal, posterior tibial, and dorsalis pedis pulses to evaluate arterial circulation throughout the lower limb.

Comparison between the two femoral pulses can reveal asymmetry in proximal arterial flow.

Peripheral Arterial Disease

Peripheral arterial disease can reduce the strength of pulses distal to arterial stenosis or occlusion.

The distribution of palpable and diminished pulses can help anatomically localize the level of arterial disease.

For example, a strong femoral pulse with reduced distal pulses suggests that significant obstruction may lie distal to the site where the femoral pulse is being examined.

Aortoiliac Occlusive Disease

Obstruction involving the distal abdominal aorta or iliac arteries can reduce blood flow into the femoral arteries.

Consequently, the femoral pulses may be diminished or absent bilaterally or asymmetrically depending on the location and extent of disease.

Pulse examination is combined with symptoms, pressure measurements, Doppler assessment, and vascular imaging when proximal arterial disease is suspected.

Radiofemoral Delay

The timing of the femoral pulse can be compared with an upper-limb pulse, particularly the radial pulse.

A clinically appreciable delay between the radial and femoral pulses is known as radiofemoral delay.

This finding is classically associated with conditions that obstruct or alter blood flow between the proximal arterial circulation and the lower body, including coarctation of the aorta.

Femoral Arterial Access

The femoral artery is an important access site for diagnostic and interventional vascular procedures.

A catheter introduced into the femoral artery can be advanced through the arterial circulation for angiography and various endovascular interventions.

Modern access is frequently performed with ultrasound guidance to identify the artery and surrounding structures accurately.

Femoral Venous Access

The femoral pulse can also serve as an anatomical reference when locating the adjacent femoral vein.

Near the inguinal ligament, the vein usually lies medial to the artery. However, vessel overlap and anatomical variation can occur.

Ultrasound guidance provides direct visualization and is preferable when precise venous localization is required.

Arterial Compression

The femoral artery can be compressed in the proximal thigh because it lies relatively superficially over deeper structures.

Direct pressure over the artery can temporarily reduce arterial flow distally and may be used as part of hemorrhage control or after selected arterial procedures.

The large caliber of the artery means that significant injury in this region can produce rapid blood loss.

Femoral Artery Injury

Trauma to the groin or proximal thigh can injure the femoral artery.

Penetrating trauma, fractures, dislocations, vascular procedures, and other injuries may cause hemorrhage, thrombosis, pseudoaneurysm, or impaired distal perfusion.

Assessment includes examination of the femoral and distal pulses together with evaluation of limb perfusion.

Femoral Artery Aneurysm and Pseudoaneurysm

An abnormal pulsatile mass in the femoral region can arise from arterial pathology.

A pseudoaneurysm may develop following arterial puncture when blood escapes through a defect in the arterial wall but remains contained by surrounding tissues.

Duplex ultrasound can demonstrate the vascular connection and characterize blood flow within the lesion.

Shock and Hemodynamic Assessment

Central and proximal peripheral pulses, including the femoral pulse, may remain detectable when more distal pulses become difficult to palpate during states of markedly reduced peripheral perfusion.

Pulse palpation alone, however, does not provide a precise measurement of blood pressure or cardiac output.

Femoral pulse findings should therefore be interpreted alongside other clinical and hemodynamic observations.

Lower Limb Trauma

The femoral pulse provides a useful proximal reference during evaluation of significant lower-limb trauma.

Comparison with popliteal, posterior tibial, and dorsalis pedis pulses can help identify changes in arterial flow across different levels of the injured limb.

When vascular injury is suspected, Doppler assessment or vascular imaging may be required even if a pulse remains palpable.

Doppler Examination

A handheld Doppler ultrasound device can detect arterial flow when palpation is difficult or when more detailed vascular assessment is required.

Duplex ultrasonography can evaluate the femoral artery's anatomy, patency, blood-flow characteristics, stenosis, thrombosis, aneurysms, and pseudoaneurysms.

It also allows visualization of the adjacent femoral vein and surrounding soft tissues.

Imaging

Ultrasound is commonly used for direct assessment of the femoral artery because the vessel is relatively superficial in the groin.

CT angiography and MR angiography can demonstrate the femoral artery as part of the broader arterial system of the pelvis and lower limbs.

Catheter angiography can provide detailed vascular imaging while also allowing selected endovascular interventions.

Surface Anatomy

The femoral artery is one of the most important surface vascular landmarks of the lower limb. Its pulse can usually be identified immediately inferior to the inguinal ligament near the midinguinal point.

The anterior superior iliac spine and pubic symphysis provide the landmarks for estimating the midinguinal point. The examiner then palpates just inferior to this level within the upper part of the femoral triangle.

The artery's superficial position, large caliber, and predictable relationship to the femoral nerve and vein make the femoral pulse an important landmark for physical examination, vascular assessment, emergency evaluation, and clinical procedures involving the proximal thigh.