Popliteal Artery Research Articles

Hemoperitoneum Due to Dissection and Rupture of the Superior Mesenteric Artery in a Patient With COL3A1 Mutation.

Introduction: Vascular Ehlers-Danlos syndrome (vEDS) is an autosomal dominant disorder that results from mutations in the collagen type III gene. It is a risk factor for medium-sized artery aneurysms, dissections, and ruptures. We report a case of hemoperitoneum due to medial dissection and rupture of the superior mesenteric artery related to vEDS. Methods: A full body CT scan and full three cavity autopsy was performed in a 47-year-old man with a history of an intermittent abdominal cramping for one week rand complex past medical history that included a sigmoid bowel perforation at age 20, and previous popliteal artery pseudoaneurysm rupture. Histology and genetic testing were performed. Results: The postmortem computed tomography and autopsy showed a significant hemoperitoneum due to a ruptured dissection of the superior mesenteric artery and branches, and multiple splanchnic artery dissections with renal and small bowel infarctions. Genetic testing revealed a heterozygous COL3A1 gene variant associated with Ehlers-Danlos syndrome. Death was attributed to hemoperitoneum due to medial dissection and rupture of the superior mesenteric artery due to arteriopathy. Discussion: The relatively young age and medical history correlate with the autopsy findings and genetic testing towards the conclusion of an arteriopathy consistent with vEDS.

Relationship between the angle of popliteal artery trifurcation branches and atherosclerosis burden in chronic peripheral arterial disease

Aim: The aim of this study was to investigate the relationship between the angles of the popliteal artery trifurcation branches and atherosclerosis burden in patients with peripheral arterial disease (PAD). Material-Methods: Digital subtraction angiography (DSA) images of patients who underwent angioplasty for lower extremity PAD between April 2021 and 2023 were retrospectively analysed. The study excluded non-type 1a popliteal artery branching variations, critical stenosis or occlusion cases, and those with motion artifacts or previous femoropopliteal bypass operations. Angles of the anterior tibial artery (ATA), posterior tibial artery (PTA), and fibular artery (FA) were measured. Atherosclerosis burden was scored from 0 to 18 based on luminal narrowing and occlusion in each artery. Spearman correlation analysis was used to examine the relationship between trifurcation angles and atherosclerosis burden. Results: A total of 68 patients were included, with a mean age of 65 years. Angioplasty was performed on the right side in 56% of patients and on the left side in 44%. The ATA angle showed a weak positive correlation with atherosclerosis burden (rs = 0.144, p = 0.29). In contrast, PTA and FA angles exhibited moderate (rs = 0.398, p = 0.001) and strong (rs = 0.599, p < 0.001) positive correlations, respectively. Conclusion: This study highlights the significant association between the angulation of popliteal artery trifurcations and atherosclerosis burden, suggesting that vessel geometry should be considered in the management of PAD.

IPACK Block and Adductor Canal Catheter vs Adductor Canal Catheter for Total Knee Arthroplasty: A Randomized Controlled Trial

Background: Regional anesthetic techniques including the adductor canal catheter (ACC) have aided management of post-operative pain for total knee arthroplasty (TKA). The interspace between the popliteal artery and posterior capsule of the knee (iPACK), has been introduced to address posterior knee pain that is not well covered by the ACC. Studies have looked at the addition of the iPACK block to subjects who received an ACC with and without periarticular local infiltration with varying results. We hypothesized that adding the iPACK block to subjects who also received an ACC and periarticular injection (PAI) would significantly decrease opioid consumption compared to the ACC alone in TKA. Methods: Sixty subjects were randomized to receive an ACC alone (control group) or ACC plus single shot iPACK block (iPACK group) for TKA. All subjects were operated on by the same surgeon and received the same PAI. For the primary outcome of postoperative pain, we used opioid consumption as measured by morphine milligram equivalent (MME). Secondary outcomes included pain scores determined by the visual analog scale (VAS), distance ambulated, time to physical therapy (PT) and length of hospital stay. Results: We did not observe a significant difference between groups for opioid consumption, pain scores, distance ambulated (p > 0.05 across all time points), length of hospital stay (p = 0.64), or time to PT (p = 0.32). Conclusion: When combined with an ACC and PAI, the iPACK block did not significantly decrease opioid consumption, pain scores, time to first PT session or increase distance ambulated.

Salvage of a comminuted proximal tibial polymicrobial infected non-union with antibiotic loaded bio-composite and intramedullary nailing: a case report

Background. Management of open proximal metaphyseal fractures poses a significant challenge and is fraught with complications. These injuries are severe, often accompanied by extensive soft tissue and vascular damage, leading to high risks of infection and long-term disability. Case presentation. A 72-year-old male was severely injured in a road traffic accident. Plain X-rays and CT angiogram identified a comminuted proximal tibial fracture with transection of the popliteal artery and vein. Initial emergency treatment included fasciotomies, external fixation, and vascular primary repair. On the 12th day of admission, the patient underwent open reduction and internal fixation (ORIF) with dual plate fixation using a two incision technique. A plastic surgeon performed skin grafting, harvested from the patient’s thigh, to allow closure of his fasciotomy wounds immediately following ORIF. Four weeks post-operatively, the patient developed a wound breakdown over the lateral fasciotomy site, exposing the metal plates with a small defect developing on the medial fasciotomy wound in tandem. The patient’s course was further complicated by persistent polymicrobial infections. Over 6 months of antibiotic regimes, operative intervention was ultimately required. All of the infected metal implants were removed, the non-union sites were aggressively debrided. The tibial canal was reamed to prepare for a tibial nailing. An antibiotic loaded bio-composite was then inserted through the non-union sites into the canal followed by an intramedullary nail. A blocking screw was used to address the procurvatum deformity in the sagittal plane. The patient currently shows signs of recovery, mobilizing over short distances, weight-bearing with assistive aids and with healing wounds and early signs of callus formation on recent CT scans and plain X-rays. Conclusions. The management of complex tibial fractures with vascular involvement demands an aggressive multidisciplinary approach and continuous adaptability in treatment plans to address the evolving challenges of such severe injuries. This case exemplifies the utility of injectable antibiotic-loaded bio-composites in a limb-salvage setting and their ability to provide high doses of local antibiotics to an infection site which, in conjunction with appropriate stable fixation and systemic antibiotics, can aid in eradicating and treating fracture-related infections.

A Retrospective Comparative Study of Mid-Term Outcomes of Atherectomy, Drug-Coating Balloon Angioplasty, and Plain Old Balloon Angioplasty for Isolated Atherosclerotic Popliteal Artery Lesions.

We retrospectively reviewed the clinical data of 217 consecutive Chinese patients with isolated atherosclerotic popliteal artery lesions treated with atherectomy technique, DCB, and plain old balloon angioplasty from August 2017 to August 2022. There was no difference in the 48-month patency rate between the atherectomy, DCB, and POBA groups (65%, 56%, and 51%, respectively; p = 0.3), as well as in adjusted Cox regression. Similarly, no difference was observed in the 48-month clinically driven target lesion revascularization-free (CDTLR-free) rate among the groups (77%, 74%, and 65%; p=0.34), confirmed by adjusted Cox regression. In the 48 months, a significant difference was observed in amputation-free rates between the atherectomy, DCB, and POBA groups (97%, 91%, and 83%, respectively; p<0.05). Adjusted Cox regression indicated POBA had worse outcomes than DCB and atherectomy. In the stenosis and occlusion subgroup, the 48-month primary patency rates were 65%, 70%, and 54% (p>0.9) and 65%versus 49%versus 49% (p=0.3), showing no differences among the three groups. In the short lesion subgroup (<10cm), the 48-month primary patency rates were 65%, 66%, and 61% for atherectomy, DCB, and POBA, respectively (p=0.7). In the long lesion subgroup (≥10cm), the 48-month patency rates were higher in the atherectomy and DCB groups compared to POBA (64%, 44%, and 34%), with no significant difference among the groups (p=0.13). DCB and atherectomy demonstrate improved short- and mid-term clinical outcomes compared to POBA in Chinese patients with popliteal artery disease.

The Untold Story: Early and Mid-Term Results of Subintimal Angioplasty in Superficial Femoral Artery Versus Popliteal Artery Chronic Total Occlusion.

This study aims to compare the immediate and mid-term outcomes of subintimal angioplasty (SIA) of chronic total occlusions (CTOs) of superficial femoral artery (SFA) versus popliteal artery (PA) and to identify possible predictors of loss of limb-based patency (LBP). This is a retrospective analysis of chronic lower-limb ischemia (CLI) patients (Rutherford classes 3-6) presenting with CTO of SFA or PA treated by SIA and selective stenting in the period 2018 to 2021. Immediate outcomes were compared between the SFA and PA groups, including technical success, perioperative complications, and 30-day major amputation and mortality rates. Mid-term outcomes for technically successful procedures included limb-based patency (LBP), wound healing rate, amputation-free survival (AFS), and major adverse limb events (MALEs). A total of 450 CLI patients underwent SIA of CTO at the SFA (n=260, 57.8%) and the PA (n=190, 42.2%). The indication for revascularization was chronic limb-threatening ischemia in 80.8% of SFA group and 84.2% of PA group. Technical success rate was higher in the PA group compared to the SFA group (96.3% vs 91.2%; p=0.03). The 30-day amputation rates were comparable between the SFA and PA groups (7.7% vs 6.8%, p=0.7, respectively). No perioperative mortality or systemic major complications occurred in the present study. Kaplan-Meier estimate of the 1-year rates were significantly better for SFA group regarding LBP (82% for SFA group vs 43% for PA group, p=0.006), AFS (88% vs 64%, p=0.02), and wound healing (79% vs 58%, p=0.027), respectively. The number of runoff vessels was the only factor associated with loss of LBP (hazard ratio [HR], 0.055; 95% confidence interval [CI]: 0.001-3.020, p=0.039). Subintimal angioplasty is an effective and safe endovascular treatment option of CTO at SFA and PA with satisfactory immediate outcomes. The mid-term outcomes, however, are better for SFA lesions in terms of improved LBP, AFS, and wound healing rates. Subintimal angioplasty is a valuable tool in the armamentarium of endovascular surgeons, as re-entry devices aren't always widely accessible. This study aims to assess the technical outcomes of peripheral vascular interventions for infrainguinal chronic total occlusions and identify possible predictors for successful subintimal angioplasty .Subintimal angioplasty is an effective treatment option for infrainguinal CTO with difference in result of immediate outcomes in popliteal lesions and SFA lesions.

Ultrasound-guided drainage of a popliteal ganglion cyst extending to the adventitia of the popliteal artery: a case report of cystic adventitial disease of synovial origin.

We report a case of a 67-year-old woman suffering from intermittent claudication secondary to severe popliteal stenosis due to compression by a popliteal ganglion cyst extending into the adventitia of the popliteal artery. After declining vein bypass grafting, this patient was successfully treated using ultrasound-guided aspiration of the cyst, which restored normal flow to the popliteal artery. Whilst aspiration of Baker's cysts causing claudication has been attempted before, this represents the first reported case of successful recanalization of the popliteal artery by ganglion cyst aspiration and further supports an important possible aetiology and treatment for cystic adventitial disease.

Assessment of primary patency for femoropopliteal graft entrapment within the sartorius muscle

PurposeBlind tunneling of subfascial femoropopliteal bypass grafts may result in inadvertent graft passage through the sartorius. The purpose of this study was to determine whether intramuscular passage of femoropopliteal bypass grafts affects primary patency.MethodsPatients undergoing femoropopliteal bypass at a Veterans Administration hospital and associated university medical center over a recent 13-year period who also had postoperative cross-sectional imaging adequate to determine graft location were examined. Five-year primary patency of grafts circumferentially enveloped by the muscle was compared with that of both extramuscular subfascial grafts and subcutaneous grafts.Results370 femoropopliteal grafts were identified, among which 258 (70%) were subfascial. Vein grafts comprised 51% of the subfascial grafts, and 53% were inserted above the knee. Available postoperative imaging in 110 subfascial grafts demonstrated 74 (67%) to lie completely within the muscle at some point. Among imaged subfascial grafts, primary patency at five years for intramuscular grafts was not significantly worse than extramuscular grafts (P = 0.31). This remained true whether grafts were vein (P = 0.39) or prosthetic (P = 0.31) and whether grafts inserted to the above-knee (P = 0.43) or below-knee (P = 0.21) popliteal artery. Multivariable Cox regression revealed a significant relationship between use of vein grafts (P = 0.013), active smoking (P = 0.01), and hypertension (P = 0.041) and primary patency, but not intramuscular graft location (P = 0.31).ConclusionThis study failed to demonstrate significantly inferior primary patency among subfascial femoropopliteal grafts tunneled intramuscularly. Larger studies may be required to adequately detect any differences in patency by muscular entrapment, especially among subgroups.

Effect of adductor canal block combined with infiltration between the popliteal artery and posterior capsular of the knee on chronic pain after total knee arthroplasty: a prospective, randomized, double-blind, placebo-controlled trial

IntroductionTotal knee arthroplasty (TKA) is accompanied by severe postoperative pain, which is reported to be an important cause of chronic pain. Ultrasound-guided adductor canal block (ACB) combined with infiltration between the popliteal artery and posterior capsular of the knee (IPACK) has been proven to have a better effect on relieving acute pain after TKA. However, whether it has a significant effect on the incidence of chronic pain after TKA has not been reported. This trial was designed to investigate the effect of ultrasound-guided ACB combined with IPACK on the incidence and intensity of chronic pain after TKA.MethodsIn this prospective, randomized, double-blind, placebo-controlled study, 100 subjects scheduled for TKA were randomly (1:1) divided into two groups: the ropivacaine group and the placebo group. Patients in each group received ultrasound-guided ACB + IPACK procedures with 0.25% ropivacaine or equal volume normal saline. All patients received multimodal analgesia. Pain intensity was assessed using the Numerical Rating Scale (NRS). The primary outcome was the incidence of chronic pain at 3 months after TKA by telephone follow-up. In addition, pain intensity in early resting and mobilized states, chronic pain intensity, the time to first rescue analgesia; opioid consumption; CRP and IL-6 after the operation; length of postoperative hospital stay; and cost of hospitalization and postoperative complications; as well as the function of the knee in the early stage after the operation, were recorded.ResultsNinety-one participants were included in the final analysis. At 3 months, the incidence of chronic pain was 30.4% in the ropivacaine group, significantly lower than 51.1% in the placebo group. Compared with the placebo group, the ACB + IPACK with ropivacaine group had significantly lower pain scores at 4 hours, 8 hours, 16 hours, and 24 hours after the operation; increased the knee range of motion at 8 hours and 24 hours after the operation; and a significantly decreased incidence of chronic pain at 3 months after the operation. During the follow-up period, there were no nerve block-related complications in either group.ConclusionIn the context of multimodal analgesia protocols, ACB combined with IPACK before surgery decreases the incidence and intensity of chronic pain 3 months after TKA compared with placebo injection. In addition, it reduces the NRS scores, whether at rest or during mobilization, and improves knee function within 24 hours after TKA.Trial registrationThis trial was registered in the China Clinical Trial Center (registration number ChiCTR2200065300) on November 1, 2022.

Contemporary Outcomes of Infrainguinal Vein Bypass Surgery for Chronic Limb-Threatening Ischaemia: A Two-Centre Cross-Sectional Study.

Background/Objectives: Chronic limb-threatening ischaemia (CLTI) is a significant life and limb-threatening condition. Two recent seminal trials, BEST-CLI and BASIL-2, have provided seemingly conflicting results concerning the optimal treatment modality for patients with CLTI. We sought to investigate the outcomes of patient undergoing infrainguinal bypass at two centres in Aotearoa New Zealand. Methods: A cross-sectional retrospective review of all patients who underwent infrainguinal bypass grafting for CLTI at Auckland City Hospital and Waikato Hospital between January 2020 and December 2021 was performed. The primary outcome was a composite of death, above-ankle amputation, and major limb reintervention. The secondary outcome was minor limb reintervention. Kaplan-Meier survival analysis was performed to determine time to the primary and secondary endpoints. Demographic factors were examined using the log-rank test to examine the effect on the outcome. Results: One hundred and nineteen patients who underwent infrainguinal bypass for CLTI in the study period were identified. Of these, 93 patients had a bypass with ipsilateral or contralateral GSV. The median follow-up time was 1.85 years. The most common indication for surgery was tissue loss (69%, n = 63), with the most common distal bypass target being the below-knee popliteal artery (45%, n = 41). The primary composite outcome occurred in 42.8% of the cohort (n = 39). Death was the most common component of the primary outcome (26%, n = 24). Male sex (HR 0.48, 95% CI 0.26-0.88, p = 0.018) and statin use (HR 0.49, 95% CI 0.24-0.98, p = 0.044) were independent predictors of protection from the composite outcome on multivariate analysis. Dialysis dependence (HR 3.32, 95% CI 1.23-8.99, p = 0.018) was an independent predictor for patients meeting the composite outcome. Conclusions: This study's results are consistent with the published outcomes of BEST-CLI. The patient cohorts examined, anatomical disease patterns, and conduit use may explain some of the differences observed between this study, BEST-CLI and BASIL-2. Further work is required to define the specific patient populations who will benefit most from an open surgical or endovascular first approach to the management of CLTI.

ESR Essentials: arterial vascular access and closure devices-practice recommendations by the Cardiovascular and Interventional Radiological Society of Europe.

Vascular access is the initial, very important, step of endovascular procedures. Various access sites include the common femoral artery, brachial artery, radial artery, popliteal artery, and distal tibial vessels (pedal arteries). Successful arterial access requires advanced knowledge of anatomy, as well as proper training and experience. Today, vascular access should be obtained using real-time, ultrasound guidance to reduce access time, patient discomfort, and puncture-related complications including dissection, arteriovenous communication, and bleeding. Nevertheless, high-level evidence to support this recommendation in peripheral procedures is limited and level A data are mainly derived from randomized cardiac trials investigating only radial and femoral access. Vascular closure devices (VCDs) for femoral access can be broadly categorized as active closure devices, compression assist devices, and external/topical hemostasis devices. There is high-level evidence demonstrating that their use is related to less time for ambulation and increased patient satisfaction. However, available data failed to clearly demonstrate a benefit in complications compared to standard manual compression in peripheral endovascular arterial procedures, and thrombotic and infectious complications reported following VCD use remain an issue. Heterogeneity noted in the literature, caused by the vast variety of devices, access sites, sheath sizes, clinical scenarios, and procedures, poses difficulties in data analysis and future study design. As a result, an individualized VCD use is currently suggested for ≥ 5 Fr femoral artery access not only to reduce time to hemostasis and ambulation and to improve patient comfort, but also to reduce bleeding complications in cases of femoral access with increased bleeding risk, deranged coagulation, and large-bore access, though a high level of evidence to support this later recommendation is limited. KEY POINTS: US guidance is strongly recommended for femoral access and is mandatory to obtain more challenging access. The use of VCDs for femoral hemostasis is generally safe, effective, and currently supported by level I evidence. Proper training and correct VCD choice, based on the patient's individual characteristics, are imperative to optimize outcomes.

Treatment extent of femoropopliteal disease and clinical outcomes following endovascular therapy.

Endovascular therapy (EVT) has become the preferred treatment modality for femoropopliteal disease. However, there is limited evidence regarding its procedural and clinical outcomes according to the affected area. The aim of this study is to investigate clinical outcomes and device effectiveness according to treatment extent in the superficial femoral artery (SFA), popliteal artery (PA), or both. In this study, we analysed EVT for SFA (2,404 limbs), PA (155 limbs), SFA/PA (383 limbs) using the population in the K-VIS ELLA (Korean Vascular Intervention Society Endovascular Therapy in Lower Limb Artery Diseases) registry. The primary endpoint was target lesion revascularisation (TLR) at 2 years. The SFA/PA group exhibited a higher prevalence of anatomical complexity, characterised by long lesions, moderate to severe calcification, and total occlusion. The procedures were successful in 97.2% of SFA, 92.9% of PA, and 95.6% of SFA/PA EVTs. The 2-year TLR rates were 21.1%, 18.6%, and 32.7% in the SFA, PA, and SFA/PA groups, respectively. SFA/PA EVT was associated with a significantly increased risk for TLR compared to the SFA group (adjusted hazard ratio [HR] 1.48 [1.09-2.00]; p=0.008) and a trend towards an increased risk compared to the PA group (adjusted HR 1.80 [1.00-3.27]; p=0.052). After overlap weighting, the use of a drug-coated balloon (DCB) was shown to be beneficial, with the lowest TLR rate after SFA and SFA/PA EVT. In this large real-world registry, SFA/PA EVT was associated with an increased risk for TLR at 2 years compared to the SFA or PA EVT groups, with favourable outcomes when using a DCB or drug-eluting stent in the SFA/PA EVT group.

Popliteal Artery Entrapment Syndrome: Updates for Evaluation, Diagnosis, and Treatment.

Popliteal artery entrapment syndrome remains difficult to diagnose. Meanwhile, our limited knowledge and understanding make treatment decisions complex. The list of differential diagnoses for exertional leg pain is broad. Oftentimes, patients exhibit confounding and coexisting diagnoses. However, accurate and rapid diagnosis of popliteal artery entrapment syndrome is essential to reduce potential lasting damage to the popliteal artery. A combination of clinical history, physical examination, ankle-brachial index, along with dynamic and static imaging such as duplex ultrasound, computed tomography angiogram, and magnetic resonance angiography, aids diagnosis. Surgical treatment may be definitive depending on the type of popliteal artery entrapment syndrome, but there have been recent advances in diagnostics with intravascular ultrasound and nonsurgical treatment with botulinum toxin type A. Further research is needed to standardize diagnostic criteria, uncover innovative diagnostic methods, and validate promising nonoperative treatment options.

Critical Lower-Limb Ischemia and Arterial Thrombosis Following Intraarticular Corticosteroid Injection of the Knee.

We present a case of acute lower-limb arterial thrombosis following intra-articular steroid injection into the knee of a previously fit and active 41-year-old man. Symptoms of acute limb ischemia developed within 24 hours of treatment. Objective assessment with ultrasound arterial duplex and CT angiogram of the lower limb confirmed acute thrombosis of the popliteal artery in the treated leg. Although there is documented evidence of the association between steroid therapy and venous thromboembolic phenomena, there are no cases of arterial thrombosis in the literature. The temporal series of events that we report strongly suggest an association between the corticosteroid injection and the acute thrombotic event, the mechanism of which remains unclear. The patient underwent successful revascularization. It is important to document and disseminate this seemingly rare complication of a commonly associated procedure to increase awareness, invoke caution, and invite others to share similar cases.

Inter- and Intra-observer Agreement of the Peripheral Arterial Calcium Scoring System in Patients Undergoing (Infra)Popliteal Endovascular Interventions

PurposePeripheral arterial calcification is an important predictor of outcomes after both conservative and endovascular treatment. Digital subtraction angiography (DSA)-based calcification scores are limited by low sensitivity and inter-observer agreement. The Peripheral Arterial Calcium Scoring System (PACSS) assesses the severity of target lesion calcification. The newly introduced modified PACSS (mPACSS) also evaluates target vessel calcification. This study aimed to assess the inter- and intra-observer reliability of PACSS and mPACSS on computed tomography angiography (CTA) in (infra)popliteal endovascular interventions.MethodsA random sample of 50 limbs from the prospective multicenter Dutch Chronic Lower Limb-Threatening Ischemia Registry (THRILLER) were included. Three experienced independent raters scored PACSS on CTA. Three months later, one blinded rater assessed the same 50 CTA scans, keeping track of assessment time. The reliability of the original 5-step PACSS, a simplified binary PACSS (0–2 vs 3–4) and the 7-step mPACSS were tested using Cohen’s and Fleiss’ kappa statistics.ResultsIn total, 50 limbs (mean age 70.1 ± 11.0, 29 men) with 41 popliteal and 40 infrapopliteal lesions were scored. Inter-observer agreement of PACSS and binary PACSS were moderate (κ = 0.60) and substantial (κ = 0.72), respectively, while intra-observer agreement was almost perfect in both scores (κ = 0.86). Inter- and intra-observer agreement of mPACSS were moderate (κ = 0.48) and substantial (κ = 0.77), respectively. Mean assessment time for an experienced rater was 3.43 ± 0.93 min per CTA scan.ConclusionBoth the semi-quantitative PACSS and mPACSS scores for (infra)popliteal arteries can be performed reliably on pre-operative CTA.Graphic

Popliteal Vein Entrapment as a Rare Form of Popliteal Entrapment Syndrome.

Popliteal entrapment syndrome (PES) describes a cluster of symptoms related to the compression of the neurovascular bundle in the popliteal fossa, most commonly involving the popliteal artery. In approximately 10-15% of the cases of popliteal entrapment syndrome, the popliteal vein is compressed. Symptoms of popliteal vein entrapment can mimic venous insufficiency or deep venous thrombosis, causing the diagnosis to be missed or delayed. Diagnosis of popliteal vein entrapment can be done with duplex imaging with flexion and extension maneuvers; however, venography is the gold standard for diagnosis. While popliteal vein entrapment is commonly associated with younger individuals, it may also be an underdiagnosed condition in older patients. We describe two cases of successful diagnosis and treatment of late-onset presentation of popliteal vein entrapment.

The presence of an aberrant anterior tibial artery does not depend on the patient's morphotype.

The aberrant anterior tibial artery (ATA) runs along the posterior surface of the tibial cortex making it, particularly, at risk during high tibial osteotomy (HTO). This study aimed to analyze the prevalence of the ATA according to global morphotype and its anatomical features in consideration of knee surgery. This retrospective study included 1589 knees on magnetic resonance imaging (MRI) studies with long-leg radiographs. The anatomical characteristics of the ATA, its distance in surgical areas at risk and its lumen were defined on MRI. Its presence according to the patient's morphotype (varus, valgus or neutral) was assessed using a χ2 test. The ATA was present in 33 of 1589 knees, resulting in a prevalence of 2.1%. The anteroposterior distance of the ATA to the tibial head was 6.6 ± 2.5 mm at the height of the tibial plateau, 2.7 ± 1.6 mm at the footprint of the posterior cruciate ligament and 1.0 ± 0.6 mm under the top of the fibula (p < 0.01). For these three levels, the ratio between the distance from the ATA to the lateral tibial border and the total tibial width decreases progressively (p < 0.001). The mean lumen area of the ATA was 4.2 ± 2.5 mm2, and the lumen of the popliteal artery was 9.2 ± 3.6 mm2, representing a ratio of 49.4 ± 27.0%. The prevalence of ATA was similar between varus and valgus patients (n.s). The presence of an ATA is rare, found in one out of 50 cases, but can be easily identified on MRI in patients before knee surgery, especially before HTO. The patient's morphotype did not influence its presence, the lumen diameter is highly variable and its clinical impact has yet to be determined. Cross-sectional study. Level 3.

Efficacy of adductor canal and popliteal plexus block combined with local anesthetic injection in the interspace between the popliteal artery and posterior capsule of the knee and local infiltrative analgesia for postoperative pain and functional outcome after total knee arthroplasty: A randomized controlled study

BackgroundAdductor canal block and periarticular infiltration analgesia (PIA) have been shown to relieve pain in total knee arthroplasty (TKA) effectively. However, their analgesic effectiveness has some limitations. Thus, we considered a novel blocking site that could achieve analgesia without affecting the muscle strength of the lower limbs. MethodsSeventy-two patients undergoing primary unilateral total knee arthroplasty were randomized into two groups. One group was treated with adductor canal and popliteal plexus (APB) combined with interspace between the popliteal artery and posterior capsule of the knee (iPACK) and local infiltration anesthesia (LIA) and the other was treated with PIA. The primary outcomes included postoperative pain, as assessed by the visual analog scale (VAS), and the consumption of oral tramadol. Secondary outcomes included functional recovery and daily ambulation distance. Tertiary outcomes included postoperative adverse effects. ResultsThe APB group had lower VAS scores after surgery at rest and during motion. Compared with the PIA group, the walking distance of the APB group on the second day was greater. The muscle strength of the APB group was lower than that of the PIA group at the early stage. Patients in the APB group also consumed less tramadol than those in the PIA group. There was no difference in the incidence of adverse events between the two groups. ConclusionsAPB combined with iPACK and LIA is a novel block for TKA, and it can reduce postoperative pain sooner after TKA without affecting postoperative functional recovery or increasing complications.

Long-term comparison of rotational and directional atherectomy outcomes in patients with femoropopliteal lesions.

Objective: This study aims to elucidate the differences in vessel patency rates, procedural complications, and the need for repeat interventions between these two techniques, thereby providing insights into the optimal atherectomy strategy for managing peripheral arterial disease in the femoropopliteal segment. Material and Methods: This retrospective study investigated the long-term effectiveness of two atherectomy techniques, rotational atherectomy (RA) and directional atherectomy (DA), in treating lower extremity peripheral artery disease (LE-PAD) affecting the superficial femoral artery (SFA) and popliteal arteries. A total of 134 patients with symptomatic LE-PAD and significant stenosis (70%-99%) were included and divided into two groups based on the atherectomy method used. Both groups underwent similar pre- and post-atherectomy procedures, including drug-coated balloon angioplasty. The primary outcome measure was clinical success, defined as procedural success and an improvement in Rutherford classification at 1year. Results: Baseline characteristics were similar between the two groups, with no significant differences in demographics or lesion characteristics, except for a higher proportion of right-sided lesions in the DA group. While both RA and DA effectively improved ankle-brachial index (ABI) and Rutherford classification at 12 months, RA demonstrated superior long-term benefits, with significantly higher ABI at 24 months and a greater proportion of asymptomatic patients. Although RA had a longer procedural duration and a higher incidence of dissection, it resulted in lower residual stenosis and fewer cases of treated segment thrombosis than DA. Both RA and DA are effective treatment options for femoropopliteal lesions, but RA may offer advantages in long-term symptom management and vessel patency. Conclusion: Both rotational and directional atherectomy effectively treat femoropopliteal lesions, with rotational atherectomy demonstrating superior long-term outcomes in terms of symptom management and vessel patency. Despite longer procedural times and a slightly higher risk of dissection, rotational atherectomy resulted in lower residual stenosis and fewer cases of treated segment thrombosis than directional atherectomy.

Temporal Pattern Analysis of Ultrasound Surveillance Data in Vascular Connective Tissue Disorders.

Ehlers-Danlos syndrome (EDS), Marfan syndrome (MFS), and Loeys-Dietz syndrome (LDS) are connective tissue disorders frequently associated with vascular aneurysm formation, dissections, and subsequent major complications. Regular imaging surveillance is recommended for these conditions. However, no guidelines currently exist regarding imaging modality or surveillance intervals. This retrospective single-center observational study analyzed clinical and imaging data of patients attending an outpatient clinic for vascular connective tissue disorders between August 2008 and January 2024. Imaging (1424 data points in total) and clinical data were extracted from electronic health records. Analysis primarily included a comparison of vessel diameter progression across imaging modalities, with an additional review of the clinical history of vascular events. In total, 19 patients with vascular connective tissue disorders (vCTDs) underwent consultations at our outpatient clinic. Nine (47.4%) patients experienced vascular events, while two (10.5%) passed away during the study period. Multimodal imaging surveillance revealed a tendency towards arterial diameter increase. Consistent ultrasound monitoring provided more reliable diameter progression data for the same arterial segment than a combination of imaging modalities. Temporal analysis indicated a tendency for the continuous growth of the abdominal aorta, the common and internal carotid artery, and the common femoral and popliteal artery. The study highlights the importance of standardized, modality-specific imaging protocols in monitoring patients with vCTDs. The variability in disease progression among these patients further complicates surveillance strategies, contemplating the need for individualized approaches. Further research and prospective multicenter studies are required to refine and improve monitoring protocols.