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PAES should be suspected in young healthy male patients with clinical symptoms consistent with compression of the vascular structures and without significant cardiovascular risk factors such as smoking.<ref name=":6" /> Multiple imaging modalities are used to confirm the diagnosis of PAES.<ref name=":7">{{Cite journal |last=Sinha |first=Sidhartha |last2=Houghton |first2=Jon |last3=Holt |first3=Peter J. |last4=Thompson |first4=Matt M. |last5=Loftus |first5=Ian M. |last6=Hinchliffe |first6=Robert J. |date=2012-01-01 |title=Popliteal entrapment syndrome |url=https://www.sciencedirect.com/science/article/pii/S0741521411020805 |journal=Journal of Vascular Surgery |language=en |volume=55 |issue=1 |pages=252–262.e30 |doi=10.1016/j.jvs.2011.08.050 |issn=0741-5214}}</ref> Based on a systemic review by Sinha et al, digital substruction angiography (DSA) is the most common imaging used for PAES diagnosis, followed by ankle-brachial index measurements (18 percent), computed tomographic angiography (CTA) (12 percent), magnetic resonance angiography (MRA) (12 percent), duplex ultrasonography (DU) (10 percent), exercise ankle-brachial index (4 percent), and other modalities (4 percent).<ref name=":7" /> According to a recent study by Willimas et al, a combination of DU and MRA is far superior in diagnosing PAES.<ref>{{Cite journal |last=Williams |first=Charles |last2=Kennedy |first2=Dominic |last3=Bastian-Jordan |first3=Matthew |last4=Hislop |first4=Matthew |last5=Cramp |first5=Brendan |last6=Dhupelia |first6=Sanjay |date=2015-9 |title=A new diagnostic approach to popliteal artery entrapment syndrome |url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4592677/ |journal=Journal of Medical Radiation Sciences |volume=62 |issue=3 |pages=226–229 |doi=10.1002/jmrs.121 |issn=2051-3895 |pmc=4592677 |pmid=26451245}}</ref>
PAES should be suspected in young healthy male patients with clinical symptoms consistent with compression of the vascular structures and without significant cardiovascular risk factors such as smoking.<ref name=":6" /> Multiple imaging modalities are used to confirm the diagnosis of PAES.<ref name=":7">{{Cite journal |last=Sinha |first=Sidhartha |last2=Houghton |first2=Jon |last3=Holt |first3=Peter J. |last4=Thompson |first4=Matt M. |last5=Loftus |first5=Ian M. |last6=Hinchliffe |first6=Robert J. |date=2012-01-01 |title=Popliteal entrapment syndrome |url=https://www.sciencedirect.com/science/article/pii/S0741521411020805 |journal=Journal of Vascular Surgery |language=en |volume=55 |issue=1 |pages=252–262.e30 |doi=10.1016/j.jvs.2011.08.050 |issn=0741-5214}}</ref> Based on a systemic review by Sinha et al, digital substruction angiography (DSA) is the most common imaging used for PAES diagnosis, followed by ankle-brachial index measurements (18 percent), computed tomographic angiography (CTA) (12 percent), magnetic resonance angiography (MRA) (12 percent), duplex ultrasonography (DU) (10 percent), exercise ankle-brachial index (4 percent), and other modalities (4 percent).<ref name=":7" /> According to a recent study by Willimas et al, a combination of DU and MRA is far superior in diagnosing PAES.<ref>{{Cite journal |last=Williams |first=Charles |last2=Kennedy |first2=Dominic |last3=Bastian-Jordan |first3=Matthew |last4=Hislop |first4=Matthew |last5=Cramp |first5=Brendan |last6=Dhupelia |first6=Sanjay |date=2015-9 |title=A new diagnostic approach to popliteal artery entrapment syndrome |url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4592677/ |journal=Journal of Medical Radiation Sciences |volume=62 |issue=3 |pages=226–229 |doi=10.1002/jmrs.121 |issn=2051-3895 |pmc=4592677 |pmid=26451245}}</ref>


Provocative maneuver can be used to improve presentation of PAES on imagings.<ref name=":8">{{Cite journal |last=Hislop |first=Matthew |last2=Kennedy |first2=Dominic |last3=Cramp |first3=Brendan |last4=Dhupelia |first4=Sanjay |date=2014 |title=Functional Popliteal Artery Entrapment Syndrome: Poorly Understood and Frequently Missed? A Review of Clinical Features, Appropriate Investigations, and Treatment Options |url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4590902/ |journal=Journal of Sports Medicine |volume=2014 |pages=105953 |doi=10.1155/2014/105953 |issn=2356-7651 |pmc=4590902 |pmid=26464888}}</ref> The patient is initially positioned supine with the legs straight, and then instructed to forceful plantarflexion. A plantarflexion force of 0 to 70 percent maximum has been shown to maximize the sensitivity and specificity for PAES diagnosis.<ref name=":8" /> The DU can be a quick, inexpensive, and noninvasive initial screening for PAES. Flow velocities in the popliteal artery will increase, as the popliteal artery is compressed, which is reflected on the DU. If DU is negative but there is still strong suspicion for PAES, MRA or CTA with provocative maneuvers are needed as follow-up imaging. MRA would demonstrate a focal occlusion or narrowing of the mid-popliteal artery, post-stenotic dilatation or aneurysm of the distal popliteal artery. If MRA or CTA is non-conclusive, DSA may be used as a further option with a high sensitivity (>97%) for PAES diagnosis.<ref name=":7" />
Provocative maneuver can be used to improve presentation of PAES on imagings.<ref name=":8">{{Cite journal |last=Hislop |first=Matthew |last2=Kennedy |first2=Dominic |last3=Cramp |first3=Brendan |last4=Dhupelia |first4=Sanjay |date=2014 |title=Functional Popliteal Artery Entrapment Syndrome: Poorly Understood and Frequently Missed? A Review of Clinical Features, Appropriate Investigations, and Treatment Options |url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4590902/ |journal=Journal of Sports Medicine |volume=2014 |pages=105953 |doi=10.1155/2014/105953 |issn=2356-7651 |pmc=4590902 |pmid=26464888}}</ref> The patient is initially positioned supine with the legs straight, and then instructed to forceful plantarflexion. A plantarflexion force of 0 to 70 percent maximum has been shown to maximize the sensitivity and specificity for PAES diagnosis.<ref name=":8" /> The DU can be a quick, inexpensive, and noninvasive initial screening for PAES. Flow velocities in the popliteal artery will increase, as the popliteal artery is compressed, which is reflected on the DU. If DU is negative but there is still strong suspicion for PAES, MRA or CTA with provocative maneuvers are needed as follow-up imaging. MRA would demonstrate a focal occlusion or narrowing of the mid-popliteal artery, post-stenotic dilatation or aneurysm of the distal popliteal artery. If MRA or CTA is non-conclusive, DSA may be used as a further option with a high sensitivity (> 97%) for PAES diagnosis.<ref name=":7" />


Additionally, functional PAES in which the gastrocnemius hypertrophy causes arterial compression during exercise can be best evaluated with dynamic CT.<ref name=":7" /> Dynamic CT involves taking images initially in a non-motion position following additional images after a series of provocative maneuvers.<ref name=":7" />
Additionally, functional PAES in which the gastrocnemius hypertrophy causes arterial compression during exercise can be best evaluated with dynamic CT.<ref name=":7" /> Dynamic CT involves taking images initially in a non-motion position following additional images after a series of provocative maneuvers.<ref name=":7" />

==Management==

* Asymptomatic patients: the management is typically expectant. PAES may be found accidentally on the imagings, but the patient may be symptom-free, thus, no intervention is required.<ref>{{Citation |last=Davis |first=Donald D. |title=Popliteal Artery Entrapment Syndrome |date=2022 |url=http://www.ncbi.nlm.nih.gov/books/NBK441965/ |work=StatPearls |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=28722994 |access-date=2022-12-04 |last2=Shaw |first2=Palma M.}}</ref>
* Symptomatic patients: opening surgical decompression is the mainstay of treatment for PAES.<ref>{{Cite journal |last=Dovell |first=G |last2=Hinchliffe |first2=RJ |date=2018-1 |title=Surgery for popliteal artery entrapment syndrome: use of an intraoperative tibial nerve stimulator and duplex ultrasound |url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5838662/ |journal=Annals of The Royal College of Surgeons of England |volume=100 |issue=1 |pages=78–79 |issn=0035-8843 |pmc=5838662 |pmid=29022807}}</ref> The release of entrapment is achieved by performing division of the medial head of the gastrocnemius or musculotendinous band. There are either posterior or medical approaches for the surgery. Previous study shows a medical approach is beneficial for type I and II while a posterior approach is better for type III and IV.<ref>{{Cite journal |last=Gourgiotis |first=Stavros |last2=Aggelakas |first2=John |last3=Salemis |first3=Nikolaos |last4=Elias |first4=Charalabos |last5=Georgiou |first5=Charalabos |date=2008-2 |title=Diagnosis and surgical approach of popliteal artery entrapment syndrome: a retrospective study |url=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2464757/ |journal=Vascular Health and Risk Management |volume=4 |issue=1 |pages=83–88 |issn=1176-6344 |pmc=2464757 |pmid=18629362}}</ref> Additionally, the use of Botulinum Toxin A has been used as an alternative noninvasive treatment for functional PAES.<ref name=":9">{{Cite web |title=ClinicalKey |url=https://www.clinicalkey.com/#!/content/playContent/1-s2.0-S0890509619302432?returnurl=https://linkinghub.elsevier.com/retrieve/pii/S0890509619302432?showall=true&referrer=https://pubmed.ncbi.nlm.nih.gov/ |access-date=2022-12-04 |website=www.clinicalkey.com}}</ref> A diagnosis of functional PAES is made if symptoms are improved after Botulinum injection. However, If symptoms are persisted, the patient can undergo an additional Botulinum injection or proceed with surgical decompression.<ref name=":9" />

The outcome following the surgery is usually favorable. Successful resolution of PAES occurs in 77 percent of cases.<ref name=":7" /> Surgical complications include deep vein thrombosis, hematoma, wound infection, or seroma.<ref name=":7" />


==References==
==References==

Revision as of 19:53, 4 December 2022

Popliteal artery entrapment syndrome
Normal course of the popliteal artery at the back of the knee

The popliteal artery entrapment syndrome (PAES) is an uncommon pathology that occurs when the popliteal artery is compressed by the surrounding popliteal fossa myofascial structures. This results in claudication and chronic leg ischemia. This condition mainly occurs in young athletes compared with those elderly affected with peripheral artery disease and associated with atherosclerosis. Patients with PAES mainly present with intermittent feet and calf pain associated with exercises and relieved with rest. PAES can be diagnosed with a combination of medical history, physical examination, and advanced imaging such as duplex ultrasound, computer tomography, or magnetic resonance angiography. Management can range from non-intervention to opening surgical decompression with a generally good prognosis. Complications of PAES can include stenotic artery degeneration, complete popliteal artery occlusion, distal arterial thromboembolism, or even formation of an aneurysm.

History

The syndrome was first described in 1879 by Anderson Stuart, a medical student, in a 64-year-old male.[1] Hamming and Vink in 1959 first described the management of the popliteal artery syndrome in a 12-year-old patient. The patient was treated with myotomy of the medial head of the gastrocnemius muscle and concomitant endarterectomy of the popliteal artery. They later reported four more cases and claimed that the incidence of this pathology in patients younger than 30 years old with claudication was 40%. Servello was the first to draw attention to diminished distal pulses observed with forced plantar- or dorsiflexion in patients with this syndrome.[2] Bouhoutsos and Daskalakis in 1981 reported 45 cases of this syndrome in a population of 20,000 Greek soldiers.[3] Over the last few decades, the increasing frequency with which popliteal artery entrapment is reported, strongly suggests greater awareness of the syndrome.[4]

Epidemiology

In the general population, popliteal artery entrapment syndrome (PAES) has an estimated prevalence of 0.16%.[5] It is most commonly found in young, physically active males.[6] In fact, sixty percent of all cases of this syndrome occur in athletically active males under the age of 30.[7] The predilection of this syndrome presents in a male to female ratio of 15:1.[5] This discrepancy in prevalence may be partially attributed to the findings that males are generally found to be more physically active than females or because a large portion of the data accumulated for PAES is from military hospitals that treat mostly male populations.[7] The prevalence of PAES varies through different populations; it increases in those who participate in running, soccer, football, basketball, or rugby.[8] During embryonic development, the medial head of gastrocnemius migrates medially and superiorly. This migration can cause structural abnormalities, such as irregular positioning of the popliteal artery, and can account for the rare instances of entrapment caused by the popliteus muscle.[7] Less than 3% of all people are born with this anatomical defect that progresses into PAES, and of those who are born with the anatomical defect, the majority never develop symptoms.[8] Bilateral presentation of PAES is found in approximately 30% of cases.[9]

Pathophysiology and Classification

PAES can be classified as either congenital or functional.[10] Analysis of human embryological development has shown that the popliteal artery and the medial head of the gastrocnemius muscle arise at approximately the same time. Because of that, abnormal development of the position of the muscles in relation to the nearby vessels can result in potential vascular compromise.[10] The varying types of PAES can be classified based on aberrant migration and resultant attachments of the medial head of the gastrocnemius muscle. Type VI PAES (functional PAES) describes a subtype that is due to repeated microtrauma resulting in the destruction of the internal elastic lamina and damage to the smooth muscles resulting in fibrosis and scar formation.

Types of Popliteal Artery Entrapment Syndrome
Type I The popliteal artery courses more medially around a normally positioned medial head of the gastrocnemius muscle.[10]
Type II The medial head of the gastrocnemius muscle attaches more laterally to the femur.[10]
Type III Aberrant additional tendon of the gastrocnemius muscle encircles a normally positioned popliteal artery.[10]
Type IV The popliteal artery is compressed by the popliteus muscle or a fibrous brand.[10]
Type V The compression of both the popliteal artery and vein by any of the above causes.[10]
Type VI The normally positioned popliteal artery is entrapped by the gastrocnemius muscle hypertrophy.[10]

Additionally, a more practical classification system is introduced by Heidelberg et al.[11] This system classifies PAES into three main types:

  • Type 1: The problem lies in the abnormal position of the popliteal artery.[11]
  • Type 2: The problem lies in the abnormal insertion of the medial head of the gastrocnemius muscle.[11]
  • Type 3: Both types 1 and 2 are presented.[11]

Medical History and Physical Examination

Patients with PAES are typically healthy young males without previous history of cardiovascular risk factors such as smoking, hypertension, hypercholesterolemia, or diabetes.[12] Typically, patients present with intermittent claudication that is worsened with exercise and relieved with rest.[10] Associated symptoms include numbness, discoloration, pallor, and coolness in the affected lower extremity.[12] Physical examination of suspected PAES may be hypertrophy of the calf muscles, as well as diminished, unequal, or absent pulses in the lower extremity upon plantarflexion or dorsiflexion.[13]

Diagnosis

Differential diagnosis

  • Chronic exertional compartment syndrome: Chronic pain and swelling of the affected muscle secondary to increase intramuscular pressure during exercise.[14]
  • Unresolved muscle strain: An injury or damage to the muscle or its attaching tendons.[15]
  • Medial tibia stress syndrome: Pain occurs over the shin bone (the tibia) with running or other sport-related activity.[16]
  • Fibular and tibial stress fracture: Non-displaced microscopic fracture of the fibular and tibia occurs in many athletes, especially runners, and also in non-athletes who suddenly increase their activity level.[17]
  • Fascial defects: The protrusion of the muscle through the surrounding fascia leads to pain and swelling of the area.[18]
  • Sciatic nerve entrapment syndrome: The sciatic nerve becomes entrapped by muscles or other structures.[19]
  • Vascular claudication (secondary to atherosclerosis): The obstruction of arterial flow leads to muscular ischemia and causes pain in the buttock and calf. More common in the elderly with cardiovascular risk factors.[20]
  • Lumbar disc herniation: A bulging disc or a herniated disc in the lower back which causes radiating pain from the buttock into the leg and sometimes into the foot.[21]

Evaluation

PAES should be suspected in young healthy male patients with clinical symptoms consistent with compression of the vascular structures and without significant cardiovascular risk factors such as smoking.[12] Multiple imaging modalities are used to confirm the diagnosis of PAES.[22] Based on a systemic review by Sinha et al, digital substruction angiography (DSA) is the most common imaging used for PAES diagnosis, followed by ankle-brachial index measurements (18 percent), computed tomographic angiography (CTA) (12 percent), magnetic resonance angiography (MRA) (12 percent), duplex ultrasonography (DU) (10 percent), exercise ankle-brachial index (4 percent), and other modalities (4 percent).[22] According to a recent study by Willimas et al, a combination of DU and MRA is far superior in diagnosing PAES.[23]

Provocative maneuver can be used to improve presentation of PAES on imagings.[24] The patient is initially positioned supine with the legs straight, and then instructed to forceful plantarflexion. A plantarflexion force of 0 to 70 percent maximum has been shown to maximize the sensitivity and specificity for PAES diagnosis.[24] The DU can be a quick, inexpensive, and noninvasive initial screening for PAES. Flow velocities in the popliteal artery will increase, as the popliteal artery is compressed, which is reflected on the DU. If DU is negative but there is still strong suspicion for PAES, MRA or CTA with provocative maneuvers are needed as follow-up imaging. MRA would demonstrate a focal occlusion or narrowing of the mid-popliteal artery, post-stenotic dilatation or aneurysm of the distal popliteal artery. If MRA or CTA is non-conclusive, DSA may be used as a further option with a high sensitivity (> 97%) for PAES diagnosis.[22]

Additionally, functional PAES in which the gastrocnemius hypertrophy causes arterial compression during exercise can be best evaluated with dynamic CT.[22] Dynamic CT involves taking images initially in a non-motion position following additional images after a series of provocative maneuvers.[22]

Management

  • Asymptomatic patients: the management is typically expectant. PAES may be found accidentally on the imagings, but the patient may be symptom-free, thus, no intervention is required.[25]
  • Symptomatic patients: opening surgical decompression is the mainstay of treatment for PAES.[26] The release of entrapment is achieved by performing division of the medial head of the gastrocnemius or musculotendinous band. There are either posterior or medical approaches for the surgery. Previous study shows a medical approach is beneficial for type I and II while a posterior approach is better for type III and IV.[27] Additionally, the use of Botulinum Toxin A has been used as an alternative noninvasive treatment for functional PAES.[28] A diagnosis of functional PAES is made if symptoms are improved after Botulinum injection. However, If symptoms are persisted, the patient can undergo an additional Botulinum injection or proceed with surgical decompression.[28]

The outcome following the surgery is usually favorable. Successful resolution of PAES occurs in 77 percent of cases.[22] Surgical complications include deep vein thrombosis, hematoma, wound infection, or seroma.[22]

References

  1. ^ Gokkus, Kemal; Sagtas, Ergin; Bakalim, Tamer; Taskaya, Ertugrul; Aydin, Ahmet Turan (2014-07-14). "Popliteal entrapment syndrome. A systematic review of the literature and case presentation". Muscles, Ligaments and Tendons Journal. 4 (2): 141–148. doi:10.32098/mltj.02.2014.09. ISSN 2240-4554. PMC 4187583. PMID 25332925.
  2. ^ Servello, Manfredi (1962-11-01). "Clinical Syndrome of Anomalous Position of the Popliteal Artery". Circulation. 26 (5): 885–890. doi:10.1161/01.CIR.26.5.885. PMID 13988163. S2CID 261140.
  3. ^ Bouhoutsos, J; Daskalakis, E (July 1981). "Muscular abnormalities affecting the popliteal vessels". British Journal of Surgery. 68 (7): 501–506. doi:10.1002/bjs.1800680720. PMID 7248723. S2CID 44852078.
  4. ^ Stager, Andrew; Clement, Douglas (1999-07-01). "Popliteal Artery Entrapment Syndrome". Sports Medicine. 28 (1): 61–70. doi:10.2165/00007256-199928010-00006. ISSN 1179-2035. PMID 10461713. S2CID 26958095.
  5. ^ a b "Popliteal Artery Occlusive Disease: Background, Problem, Epidemiology". 2016-04-10. {{cite journal}}: Cite journal requires |journal= (help)
  6. ^ Sharma, Aditya (2014). "Conditions Presenting with Symptoms of Peripheral Arterial Disease". Seminars in Interventional Radiology. 31 (4): 281–291. doi:10.1055/s-0034-1393963. PMC 4232436. PMID 25435652.
  7. ^ a b c Stager, Andrew; Clement, Douglas (2012-09-23). "Popliteal Artery Entrapment Syndrome". Sports Medicine. 28 (1): 61–70. doi:10.2165/00007256-199928010-00006. ISSN 0112-1642. PMID 10461713. S2CID 26958095.
  8. ^ a b "Popliteal Artery Entrapment Syndrome (PAES) | Cleveland Clinic". Cleveland Clinic. Retrieved 2016-12-19.
  9. ^ Drigny, Joffrey; Reboursière, Emmanuel; Desvergée, Antoine; Ruet, Alexis; Hulet, Christophe (June 2019). "Concurrent Exertional Compartment Syndrome and Functional Popliteal Artery Entrapment Syndrome: A Case Report". PM&R. 11 (6): 669–672. doi:10.1002/pmrj.12081. ISSN 1934-1482. PMID 30689303. S2CID 195661793.
  10. ^ a b c d e f g h i Júnior, Francisco Cialdine Frota Carneiro; Carrijo, Eduardo Nazareno dos Anjos; Araújo, Samuel Tomaz; Nakano, Luis Carlos Uta; de Amorim, Jorge Eduardo; Cacione, Daniel Guimarães (2018-01-09). "Popliteal Artery Entrapment Syndrome: A Case Report and Review of the Literature". The American Journal of Case Reports. 19: 29–34. doi:10.12659/AJCR.905170. ISSN 1941-5923. PMC 5769514. PMID 29311538.
  11. ^ a b c d Papaioannou, S; Tsitouridis, K; Giataganas, G; Rodokalakis, G; Kyriakou, V; Papastergiou, Ch; Arvaniti, M; Tsitouridis, I (2009). "Evaluation of popliteal arteries with CT angiography in popliteal artery entrapment syndrome". Hippokratia. 13 (1): 32–37. ISSN 1108-4189. PMC 2633250. PMID 19240818.
  12. ^ a b c Davis, Donald D.; Shaw, Palma M. (2022), "Popliteal Artery Entrapment Syndrome", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 28722994, retrieved 2022-12-04
  13. ^ "ClinicalKey". www.clinicalkey.com. Retrieved 2022-12-04.
  14. ^ Bong MR, Polatsch DB, Jazrawi LM et al. Chronic exertional compartment syndrome: diagnosis and management.Bull Hosp Jt Dis. 2005;62(3-4):77-84.
  15. ^ Noonan, Thomas J.; Garrett, William E. Jr (July 1999). "Muscle Strain Injury: Diagnosis and Treatment". JAAOS - Journal of the American Academy of Orthopaedic Surgeons. 7 (4): 262–269. doi:10.5435/00124635-199907000-00006. ISSN 1067-151X. PMID 10434080.
  16. ^ McClure, Charles J.; Oh, Robert (2022), "Medial Tibial Stress Syndrome", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 30860714, retrieved 2022-12-04
  17. ^ "UpToDate". www.uptodate.com. Retrieved 2022-12-04.
  18. ^ Dyson, Kathryn; Palan, Jeya; Mangwani, Jitendra (2019). "Bilateral non-traumatic lower leg fascial defects causing peroneal muscle herniation and novel use of a GraftJacket to repair the fascial defect". Journal of Clinical Orthopaedics and Trauma. 10 (5): 879–883. doi:10.1016/j.jcot.2018.09.009. ISSN 0976-5662. PMC 6739491. PMID 31528061.
  19. ^ Hicks, Brandon L.; Lam, Jason C.; Varacallo, Matthew (2022), "Piriformis Syndrome", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 28846222, retrieved 2022-12-04
  20. ^ "UpToDate". www.uptodate.com. Retrieved 2022-12-04.
  21. ^ Al Qaraghli, Mustafa I.; De Jesus, Orlando (2022), "Lumbar Disc Herniation", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 32809713, retrieved 2022-12-04
  22. ^ a b c d e f g Sinha, Sidhartha; Houghton, Jon; Holt, Peter J.; Thompson, Matt M.; Loftus, Ian M.; Hinchliffe, Robert J. (2012-01-01). "Popliteal entrapment syndrome". Journal of Vascular Surgery. 55 (1): 252–262.e30. doi:10.1016/j.jvs.2011.08.050. ISSN 0741-5214.
  23. ^ Williams, Charles; Kennedy, Dominic; Bastian-Jordan, Matthew; Hislop, Matthew; Cramp, Brendan; Dhupelia, Sanjay (2015-9). "A new diagnostic approach to popliteal artery entrapment syndrome". Journal of Medical Radiation Sciences. 62 (3): 226–229. doi:10.1002/jmrs.121. ISSN 2051-3895. PMC 4592677. PMID 26451245. {{cite journal}}: Check date values in: |date= (help)
  24. ^ a b Hislop, Matthew; Kennedy, Dominic; Cramp, Brendan; Dhupelia, Sanjay (2014). "Functional Popliteal Artery Entrapment Syndrome: Poorly Understood and Frequently Missed? A Review of Clinical Features, Appropriate Investigations, and Treatment Options". Journal of Sports Medicine. 2014: 105953. doi:10.1155/2014/105953. ISSN 2356-7651. PMC 4590902. PMID 26464888.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  25. ^ Davis, Donald D.; Shaw, Palma M. (2022), "Popliteal Artery Entrapment Syndrome", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 28722994, retrieved 2022-12-04
  26. ^ Dovell, G; Hinchliffe, RJ (2018-1). "Surgery for popliteal artery entrapment syndrome: use of an intraoperative tibial nerve stimulator and duplex ultrasound". Annals of The Royal College of Surgeons of England. 100 (1): 78–79. ISSN 0035-8843. PMC 5838662. PMID 29022807. {{cite journal}}: Check date values in: |date= (help)
  27. ^ Gourgiotis, Stavros; Aggelakas, John; Salemis, Nikolaos; Elias, Charalabos; Georgiou, Charalabos (2008-2). "Diagnosis and surgical approach of popliteal artery entrapment syndrome: a retrospective study". Vascular Health and Risk Management. 4 (1): 83–88. ISSN 1176-6344. PMC 2464757. PMID 18629362. {{cite journal}}: Check date values in: |date= (help)
  28. ^ a b "ClinicalKey". www.clinicalkey.com. Retrieved 2022-12-04.
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