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Femoral artery
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<h2 id="structure">Structure</h2> <p>The femoral artery represents the continuation of the <a href="/facts/External_iliac_artery/v6sL911k">external iliac artery</a> beyond the <a href="/facts/Inguinal_ligament/h7gIrgy7">inguinal ligament</a> underneath which the vessel passes<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> to enter the thigh.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> The vessel passes under the inguinal ligament just medial of the midpoint of this ligament,<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> midway between the <a href="/facts/Anterior_superior_iliac_spine/r5V6Kl8b">anterior superior iliac spine</a> and the <a href="/facts/Pubic_symphysis/voKAVNqB">symphysis pubis</a> (mid-inguinal point). </p><p>In common usage, in clinical practice including <a href="/facts/Angiology/8wMTGuYm">angiology</a> and <a href="/facts/Vascular_surgery/rShyKmad">vascular surgery</a>, the femoral artery includes the common femoral artery, and the superficial femoral artery however, the <a href="/facts/Terminologia_Anatomica/m4qt6jop">Terminologia Anatomica</a> (TA) only lists the femoral artery. (The TA is the international standard for <a href="/facts/Human_anatomy/WP1QbDTn">human anatomical</a> terminology developed by the <a href="/facts/Federative_International_Programme_on_Anatomical_Terminology/p4IM0WDw">Federative International Programme on Anatomical Terminology</a>).<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> </p> <ul><li>The common femoral artery (CFA) is located between the inferior margin of the <a href="/facts/Inguinal_ligament/h7gIrgy7">inguinal ligament</a>, and the branching point of the <a href="/facts/Deep_femoral_artery/Ls3FSK2t">deep femoral artery</a>. Its first three or four centimetres are enclosed, with the <a href="/facts/Femoral_vein/yw1uI1Kl">femoral vein</a>, in the <a href="/facts/Femoral_sheath/LgaJPjnA">femoral sheath</a>. In 65% of people, the common femoral artery lies anterior to the femoral vein in the upper thigh.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> The CFA is, after the <a href="/facts/Popliteal_artery/YTePmDul">popliteal artery</a>, the most common peripheral site of general dilatation or aneurysmal formation, at a frequency of 1/10 of the aorta.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> Highly calcific arterial stenosis in the CFA is very difficult to treat by endovascular intervention.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> Stent positioning in CFA may be limited by compressive or torsional forces, leading to stent fracture and/or restenosis.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> On the other hand, lithoplasty balloon angioplasty may represent a safe tool to treat CFA stenosis.<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a></li> <li>The superficial femoral artery<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a> is a designation for the segment between the branching point of the deep femoral artery and the <a href="/facts/Adductor_hiatus/l1tC6HHx">adductor hiatus</a>, passing through the <a href="/facts/Subsartorial_canal/x2Rfa3fK">subsartorial canal</a>. However, this term is not listed in <i><a href="/facts/Terminologia_Anatomica/m4qt6jop">Terminologia Anatomica</a></i>, and usage of the term <i>superficial femoral</i> is discouraged by many <a href="/facts/Physician/qJ3woFvG">physicians</a> because it leads to confusion among general medical practitioners, at least for the <a href="/facts/Femoral_vein/yw1uI1Kl">femoral vein</a> that courses next to the femoral artery.<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a> In particular, the adjacent femoral vein is clinically a <a href="/facts/Deep_vein/VwHHIsNF">deep vein</a>, where <a href="/facts/Deep_vein_thrombosis/vX7cGv8J">deep vein thrombosis</a> indicates <a href="/facts/Anticoagulant/cARpjm0G">anticoagulant</a> or <a href="/facts/Thrombolytic_therapy/6hUSmL3G">thrombolytic therapy</a>, but the adjective <i>"superficial"</i> leads many physicians to falsely believe it is a <a href="/facts/Superficial_vein/8mP0a4dH">superficial vein</a>, which has resulted in patients with femoral thrombosis being denied proper treatment.<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a><a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a><a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a> Therefore, the segment is alternatively termed the subsartorial artery.<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a> The segment enters the <a href="/facts/Adductor_hiatus/l1tC6HHx">adductor hiatus</a> and becomes the <a href="/facts/Popliteal_artery/YTePmDul">popliteal artery</a> which goes through the <a href="/facts/Popliteal_fossa/mcl1blqQ">popliteal fossa</a>.<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a></li></ul> <h3>Relations</h3> <p>The <i>relations</i> of the femoral artery are as follows: </p> <ul><li><i>Anteriorly:</i> In the upper part of its course, it is superficial and is covered by skin and fascia. In the lower part of its course, it passes behind the <a href="/facts/Sartorius_muscle/u8BL6NCe">sartorius muscle</a>.</li> <li><i>Posteriorly:</i> The artery lies on the <a href="/facts/Psoas_minor_muscle/ABxvY4lw">psoas</a>, which separates it from the <a href="/facts/Hip/UvnUYIfS">hip joint</a>, the <a href="/facts/Pectineus/sAGCSJAR">pectineus</a>, and the <a href="/facts/Adductor_longus/KdaME9Lo">adductor longus</a>. The femoral vein intervenes between the artery and the adductor longus.</li> <li><i>Medially:</i> It is related to the femoral vein in the upper part of its course.</li> <li><i>Laterally:</i> The <a href="/facts/Femoral_nerve/ojdewxlV">femoral nerve</a> and its branches.</li></ul> <h3>Branches</h3> <p>Common femoral artery </p><ul><li>The <a href="/facts/Superficial_circumflex_iliac_artery/ek7BL0L5">superficial circumflex iliac artery</a><a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a> is a small branch that runs up to the region of the <a href="/facts/Anterior_superior_iliac_spine/r5V6Kl8b">anterior superior iliac spine</a>.</li> <li>The <a href="/facts/Superficial_epigastric_artery/9oIyEPmQ">superficial epigastric artery</a><a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a> is a small branch that crosses the inguinal ligament and runs to the region of the <a href="/facts/Navel/ICl77Nwb">umbilicus</a>.</li> <li>The <a href="/facts/Superficial_external_pudendal_artery/4lx4FVc1">superficial external pudendal artery</a><a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a> is a small branch that runs medially to supply the skin of the scrotum or labium majus as.</li> <li>The <a href="/facts/Deep_external_pudendal_artery/6AxeAwX8">deep external pudendal artery</a> runs medially and supplies the skin of the scrotum or labium majus.</li> <li>The <a href="/facts/Deep_femoral_artery/Ls3FSK2t">deep femoral artery</a> is a large and important branch that arises from the lateral side of the femoral artery about 1.5 in. (4 cm) below the inguinal ligament. It passes medially behind the femoral vessels and enters the <a href="/facts/Medial_compartment_of_thigh/jwFKl7HA">medial fascial compartment of the thigh</a>. It ends by becoming the fourth <a href="/facts/Perforating_arteries/MGcf7qcp">perforating artery</a>. At its origin, it gives off the <a href="/facts/Medial_circumflex_femoral_artery/GKmm9RXQ">medial</a> and <a href="/facts/Lateral_circumflex_femoral_artery/5ood1lEo">lateral circumflex femoral</a> arteries, and during its course it gives off three perforating arteries.<a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a></li></ul> <p>Superficial femoral artery </p> <ul><li>The <a href="/facts/Descending_genicular_artery/crJ0m9oC">descending genicular artery</a> is a small branch that arises from the femoral artery near its termination within the adductor canal. It assists in supplying the knee joint.</li></ul> <h2 id="clinical-significance">Clinical significance</h2> <h3>Clinical examination</h3> <p>The site for optimally palpating the <i>femoral pulse</i> is in the inner thigh, at the <a href="/facts/Mid-inguinal_point/IpJ1fq2f">mid-inguinal point</a>, halfway between the pubic symphysis and anterior superior iliac spine. Presence of a <i>femoral pulse</i> indicates a systolic <a href="/facts/Blood_pressure/VtqqSM2J">blood pressure</a> of more than 50 mmHg.<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a> </p> <h3>Vascular access</h3> <p>Femoral artery is the frequent site of access in <a href="/facts/Angiography/4onftT3X">angiography</a>. As the pulsation of the common femoral artery can often be <a href="/facts/Palpation/6tnvdcJY">palpated</a> through the skin; and the site of maximum pulsation is used as a point of puncture for <a href="/facts/Catheter/ehnH1eF5">catheter</a> access.<a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a> From here, wires and catheters can be directed anywhere in the arterial system for intervention or diagnostics, including the heart, brain, kidneys, arms and legs. The direction of the needle in the femoral artery can be against blood flow (retro-grade), for intervention and diagnostic towards the heart and opposite leg, or with the flow (ante-grade or ipsi-lateral) for diagnostics and intervention on the same leg. Access in either the left or right femoral artery is possible and depends on the type of intervention or diagnostic. </p><p>To image the lower limb vascular anatomy, the common femoral artery (CFA) is chosen as the site of entry. However, CFA entry can only be assessed by retrograde puncture. Therefore, a catheter is advanced retrogradely through the contralateral common femoral artery into common iliac artery, crossing the midline into ipsilateral CFA. The SFA can then be assessed by antegrade puncture.<a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a> </p><p>The femoral artery can be used to draw arterial blood when the blood pressure is so low that the radial or brachial arteries cannot be located. </p> <h3>Peripheral arterial disease</h3> <p>The femoral artery is susceptible to <a href="/facts/Peripheral_arterial_disease/gIpXlQFu">peripheral arterial disease</a>.<a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a> When it is blocked through <a href="/facts/Atherosclerosis/WIS8QQ6v">atherosclerosis</a>, <a href="/facts/Percutaneous/nzRyKveF">percutaneous</a> intervention with access from the opposite femoral may be needed. <a href="/facts/Endarterectomy/gRBY58UV">Endarterectomy</a>, a surgical cut down and removal of the plaque of the femoral artery is also common. If the femoral artery has to be <a href="/facts/Ligature_(medicine)/p7CYDSWv">ligated</a> surgically to treat a <a href="/facts/Popliteal_artery/YTePmDul">popliteal</a> <a href="/facts/Aneurysm/Yz3G3LoJ">aneurysm</a>, blood can still reach the <a href="/facts/Popliteal_artery/YTePmDul">popliteal artery</a> distal to the ligation via the <a href="/facts/Genicular_anastomosis/jYKILaft">genicular anastomosis</a>. However, if flow in the femoral artery of a normal leg is suddenly disrupted, blood flow distally is rarely sufficient. The reason for this is the fact that the <a href="/facts/Genicular_anastomosis/jYKILaft">genicular anastomosis</a> is only present in a minority of individuals and is always undeveloped when disease in the femoral artery is absent.<a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Brachial_artery/vUMTNram">Brachial artery</a>, an arm based artery with a similar function</li></ul> <p class="note">This article uses <a href="/facts/Anatomical_terminology/n3IASQlr">anatomical terminology</a>.</p> <h2 id="additional-images">Additional images</h2> <h2 id="external-links">External links</h2> Wikimedia Commons has media related to Femoral artery. <ul><li><a href="http://ect.downstate.edu/courseware/haonline/labs/l12/050101.htm">Anatomy photo:12:05-0101</a> at the SUNY Downstate Medical Center</li> <li><a href="https://www.meduniwien.ac.at/plastination/pelvis/pelvis-e12-15-text.html">Cross section image: pelvis/pelvis-e12-15</a>—Plastination Laboratory at the Medical University of Vienna</li> <li><a href="https://web.archive.org/web/20061206065258/http://anatomy.med.umich.edu/surface/pulses/pulses.html">Image at umich.edu - pulse</a></li> <li><a href="http://kobiljak.msu.edu/CAI/ANT551/Unit04/Topic07/U4_L7_O1.html">Diagram at MSU</a> <a href="https://web.archive.org/web/20110717110327/http://kobiljak.msu.edu/CAI/ANT551/Unit04/Topic07/U4_L7_O1.html">Archived</a> July 17, 2011, at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a></li> <li><a href="https://peripheralarteryanswers.com/quantaflo-vs-abi/">QuantaFlo vs ABI in Peripheral Arterial Disease</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Schulte, Erik; Schumacher, Udo (2006). "Arterial Supply to the Thigh". In Ross, Lawrence M.; Lamperti, Edward D. (eds.). Thieme Atlas of Anatomy: General Anatomy and Musculoskeletal System. Thieme. p. 490. 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