Complications related to the Cook-Swartz implantable Doppler probe use in head and neck microvascular reconstruction: a systematic review.

PURPOSE: Vascular perfusion research has been dedicated to identify inexpensive, effective, and easy to use methods to assess free flap perfusion for both buried and non-buried flaps. METHODS: Systematic review of complications in patients underwent Head and Neck microsurgical reconstruction and vascular implantable Doppler monitoring. RESULTS: Sixteen articles were included for qualitative analysis. 2535 (92.2%) patients received IDP monitorization. Venous thrombosis was the most common vascular complication effecting 28 (1.1%). Regarding complications potentially related to the use of the IDP, just one study described the presence of granuloma formation along the suture line in 2 (0.07%) patients. CONCLUSIONS: Our findings indicated that Cook-Swartz IDP will represents a safe and effective device for FF monitoring in HN reconstructive micro-surgery. A detailed prospective registration of the results and complications related to the use of IDP remains mandatory to precisely estimate results, cost, and complications.

Arterial stiffness as an ultrasound biomarker of radiation-induced carotid artery disease.

Background: Radiation-induced carotid artery disease (RICAD) is an important issue in head and neck cancer (HNC) survivors after radiotherapy (RT). The risk of cerebrovascular disease in these patients is doubled. The aim of this study was to assess the effect of RT on carotid artery stiffness in HNC patients. Patients and methods: Conventional arterial stiffness parameters were measured in a total of 50 HNC survivors treated with RT for at least 5 years and compared to 50 unirradiated HNC patients. Elastic modulus (Ep) and Beta stiffness index (ß) were measured in proximal, mid and distal common carotid artery (CCA). Results: The mean age of the subjects was 68±9 years (range: 44-84) in the irradiated group and 67±10 years (range: 45-85) in the control group. The RT group was treated with a mean radiation exposure of 60.3±6.7 Gy (range: 44-72) in the neck. Carotid stiffness parameters showed significant group differences: Ep in the RT group was 2.329±1.222 vs 1.742±828 in the non-RT group (p=0.006) and ß index in the RT group was 23±11 vs 15±8 in the non-RT group (p<0.001). Radiation-induced carotid stiffness was quantified and cervical exposure to RT increased Ep in 575 kPa (p=0.014) and ß in 7 units (p<0.003). Conclusions: Ep and ß index could be suitable ultrasound biomarkers of radiation-induced atherosclerosis in HNC survivors. Further prospective studies are needed to feature RICD in this setting.

Radiation-induced carotid artery lesions.

PURPOSE: To review the current aspects of knowledge related to the risk of cerebrovascular events in patients receiving head and neck radiotherapy. METHODS: A literature search was performed in PubMed. Papers meeting selection criteria were reviewed. RESULTS: We provide an update on the problem by identifying key studies that have contributed to our current understanding of the epidemiology, radiologic features, pathogenesis, and treatment of the disease. The incidence of carotid artery stenosis ranged from 18 to 38% in patients who underwent radiotherapy for head and neck cancer versus from 0 to 9.2% among the nonirradiated patients. Neck irradiation increases the intima-media thickness of the carotid artery wall. These changes are the earliest visible alteration in the carotid wall and are also detected with color Doppler ultrasonography. Endovascular treatment with a carotid angioplasty and stenting is the first-line treatment for most symptomatic patients. CONCLUSIONS: Radiation-induced atherosclerosis is a different and accelerated form of atherosclerosis, which implies a more aggressive disease with a different biologic behavior. The disease is characterized by a high rate of carotid artery stenosis compared to those observed in nonirradiated control group patients. To prevent the risk of stroke, surveillance and imaging with ultrasonography should enable detection of severe stenosis. Endovascular treatment with a carotid angioplasty and stenting has been proposed as an attractive and minimally invasive alternative for some radiation-induced stenoses.

Malignant carotid body tumors: What we know, what we do, and what we need to achieve. A systematic review of the literature.

Malignant carotid body tumors (MCBT) are rare and diagnosed after detection of nodal or distant metastases. This systematic review (SR) focuses on MCBT initially approached by surgery. Preferred Reporting Items for SR and Meta-Analysis (MA) guided the articles search from 2000 to 2023 on PubMed, Scopus, and Web of Science. Among 3548 papers, 132 (337 patients) were considered for SR; of these, 20 (158 patients) for MA. Malignancy rate was 7.3%, succinate dehydrogenase (SDH) mutation 17%, age at diagnosis between 4th and 6th decades, with a higher prevalence of females. MCBTs were mostly Shamblin III, with nodal and distant metastasis in 79.7% and 44.7%, respectively. Malignancy should be suspected if CBT >4 cm, Shamblin III, painful or otherwise symptomatic, at the extremes of age, bilateral, with multifocal disease, and SDHx mutations. Levels II-III clearance should be performed to exclude nodal metastases and adjuvant treatments considered on a case-by-case basis.

Novel Imaging-Based Biomarkers for Identifying Carotid Plaque Vulnerability.

Carotid artery disease has traditionally been assessed based on the degree of luminal narrowing. However, this approach, which solely relies on carotid stenosis, is currently being questioned with regard to modern risk stratification approaches. Recent guidelines have introduced the concept of the "vulnerable plaque," emphasizing specific features such as thin fibrous caps, large lipid cores, intraplaque hemorrhage, plaque rupture, macrophage infiltration, and neovascularization. In this context, imaging-based biomarkers have emerged as valuable tools for identifying higher-risk patients. Non-invasive imaging modalities and intravascular techniques, including ultrasound, computed tomography, magnetic resonance imaging, intravascular ultrasound, optical coherence tomography, and near-infrared spectroscopy, have played pivotal roles in characterizing and detecting unstable carotid plaques. The aim of this review is to provide an overview of the evolving understanding of carotid artery disease and highlight the significance of imaging techniques in assessing plaque vulnerability and informing clinical decision-making.

Evaluation of Intima-Media Thickness and Arterial Stiffness as Early Ultrasound Biomarkers of Carotid Artery Atherosclerosis.

Carotid atherosclerosis is a major and potentially preventable cause of ischemic stroke. It begins early in life and progresses silently over the years. Identification of individuals with subclinical atherosclerosis is needed to initiate early aggressive vascular prevention. Although carotid plaque appears to be a powerful predictor of cardiovascular risk, carotid intima-media thickness (CIMT) and arterial stiffness can be detected at the initial phases and, therefore, they are considered important new biomarkers of carotid atherosclerosis. There is a well-documented association between CIMT and cerebrovascular events. CIMT provides a reliable marker in young people, in whom plaque formation or calcification is not established. However, the usefulness of CIMT measurement in the improvement of risk cardiovascular models is still controversial. Carotid stiffness is also significantly associated with ischemic stroke. Carotid stiffness adds value to the existing risk prediction based on Framingham risk factors, particularly individuals at intermediate cardiovascular risk. Carotid ultrasound is used to assess carotid atherosclerosis. During the last decade, automated techniques for sophisticated analysis of vascular mechanics have evolved, such as speckle tracking, and new methods based on deep learning have been proposed with promising outcomes. Additional research is needed to investigate the imaging-based cardiovascular risk prediction of CIMT and stiffness.

Benign Peripheral Non-cranial Nerve Sheath Tumors of the Neck.

Benign peripheral non-cranial nerve sheath tumors are rare lesions, including both schwannomas and neurofibromas. These tumors arise from Schwann cells, and may originate from any peripheral, cranial, or autonomic nerve. Most of them are localized and sporadic but multifocal systemic forms can occur. Cervical sympathetic chain, brachial plexus, cervical plexus and spinal roots and nerves are the major nerve systems commonly affected. Dumbbell-shaped intra- and extradural tumors occur most commonly in the cervical spine, as well as purely extradural and paravertebral tumors. The management of these tumors has improved greatly owing to the developments in imaging techniques and surgical innovations such as endoscopically assisted approaches and robotic surgery. Microsurgical intracapsular excision of the tumor helped by the use of intraoperative fluorescent dyes and intraoperative neurophysiological monitoring minimize postoperative neural deficit, since most schwannomas are encapsulated. Most tumors can be removed with a low rate of complications and recurrence. Radiotherapy should be considered for growing lesions that are not amenable to surgery. In asymptomatic patients, observation and serial scans is an option for elderly infirm patients.

Occlusion of the internal jugular vein in differentiated thyroid carcinoma: Causes and diagnosis.

Occlusion of the internal jugular vein (IJV) can be observed in thyroid cancer either on preoperative imaging with ultrasound or cross-sectional imaging, particularly contrast-enhanced CT-scan, and can be detected during follow-up when using these same imaging modalities. For thyroid cancer, four different causes of occlusion of the IJV can be identified: venous thrombosis associated with a hypercoagulable state, tumor thrombus in the vein, compression or invasion of the IJV by thyroid disease or lymph node metastases, and fibrotic collapse of the IJV following lateral neck dissection. Clinicians managing patients with thyroid cancer need to be aware of and able to diagnose each of these conditions. The overall patient impact and appropriate management of each will be discussed.

Trends in the Management of Non-Vestibular Skull Base and Intracranial Schwannomas.

The aim of this review is to analyze the latest trends in the management of non-vestibular skull base and intracranial schwannomas in order to optimize tumor control and quality of life. Non-vestibular cranial nerve schwannomas are rare lesions, representing 5-10% of cranial nerve schwannomas. Management decisions should be individualized depending on tumor size, location and associated functional deficits. Generally, large sized schwannomas exerting significant mass effect with increased intracranial pressure are treated surgically. In some cases, even after optimal skull base resection, it is not possible to achieve a gross total resection because tumor location and extent and/or to reduce morbidity. Thus, subtotal resection followed by stereotactic radiosurgery or fractioned radiotherapy offers an alternative approach. In certain cases, stereotactic radiosurgery or radiotherapy alone achieves good tumor control rates and less morbidity to gross total resection. Finally, given the slow growth rate of most of these tumors, observation with periodic radiographic follow-up approach is also a reasonable alternative for small tumors with few, if any, symptoms.

Management of extracranial arteriovenous malformations of the head and neck.

The purpose of this study was to review the outcomes of the different therapies for extracranial head and neck arteriovenous malformations (AVMs). AVMs are high-flow congenital vascular anomalies. They are composed of a complex system of vessels directly connecting feeding arteries to draining veins forming a nidus. They may be potentially life-threatening due to progressive symptoms and infiltrative disease. Extracranial AVMs most commonly affect the head and neck area (47.4%) followed by the extremities (28.5%). AVMs are best characterized as being either focal or diffuse. Focal AVMs have good outcomes following adequate treatment. Diffuse lesions have multiple feeding vessel, which results in high rates of recurrence despite treatment. The management of AVMs includes conventional surgery and endovascular techniques. A combination of embolization and surgical resection has become the treatment of choice over the last years. The main goal of both forms of treatment being the complete blockage or resection of the nidus. Transcatheter embolization of vessels has evolved over the years and new embolic agents have emerged. The types of materials available for embolization are classified into mechanical devices, liquid agents and particulates. Efficacy, rate of recurrence and most common complications were evaluated. AVMs recurrence after embolization or resection is reported in up to 80% of cases. Incomplete resection and embolization can induce aggressive growth of the remaining nidus and the risk of progression is up to 50% within the first 5 years and recurrences can occur up to 10 years later. Although ethanol seems to be associated with the highest degree of cure and permanent occlusion, the overall complication rate reported was 48%. Other materials, such as cyanoacrylate, have obtained modest rates of complete remission, while the reported rates of complete regression of AVMs with Fibrin glue and Polyvinyl alcohol are above 50%. At present, there are no unified agreement on the ideal embolic agent. Therefore, a multidisciplinary approach is recommended to support decision making about the best therapeutic approach and to achieve optimal outcome. A long-term post-treatment follow-up is recommended to recognize early recurrence.

Carotid blowout syndrome: modern trends in management.

Carotid blowout syndrome (CBS) refers to rupture of the carotid artery and is an uncommon complication of head and neck cancer that can be rapidly fatal without prompt diagnosis and intervention. CBS develops when a damaged arterial wall cannot sustain its integrity against the patient's blood pressure, mainly in patients who have undergone surgical procedures and radiotherapy due to cancer of the head and neck, or have been reirradiated for a recurrent or second primary tumor in the neck. Among patients irradiated prior to surgery, CBS is usually a result of wound breakdown, pharyngocutaneous fistula and infection. This complication has often been fatal in the past, but at the present time, early diagnosis and modern technology applied to its management have decreased morbidity and mortality rates. In addition to analysis of the causes and consequences of CBS, the purpose of this paper is to critically review methods for early diagnosis of this complication and establish individualized treatment based on endovascular procedures for each patient.

Sacrifice and extracranial reconstruction of the common or internal carotid artery in advanced head and neck carcinoma: Review and meta-analysis.

BACKGROUND: Sacrifice and reconstruction of the carotid artery in cases of head and neck carcinoma with invasion of the common or internal carotid artery is debated. METHODS: We conducted a systematic search of electronic databases and provide a review and meta-analysis. RESULTS: Of the 72 articles identified, 24 met the inclusion criteria resulting in the inclusion of 357 patients. The overall perioperative 30-day mortality was 3.6% (13/357). Permanent cerebrovascular complications occurred in 3.6% (13/357). Carotid blowout episodes were encountered in 1.4% (5/357). The meta-regression analysis showed a significant difference in 1-year overall survival between reports published from 1981-1999 (37.0%) and 2001-2016 (65.4%; P = .02). CONCLUSION: This review provides evidence that sacrifice with extracranial reconstruction of common or internal carotid artery in selected patients with head and neck carcinoma may improve survival with acceptable complication rates. However, all of the published literature is retrospective involving selected series and, therefore, precludes determining the absolute effectiveness of the surgery.

Impacto de la COVID-19 sobre los indicadores hospitalarios: análisis de los grupos relacionados por el diagnóstico en un servicio de cirugía vascular / Impact of COVID-19 on key performance indicators: analysis of diagnosis related groups in a vascular surgery department

Objetivos: evaluar el impacto de la pandemia por la COVID-19 sobre una serie de indicadores funcionaleshospitalarios mediante el uso de grupos relacionados por el diagnóstico (GRD). Comparar los resultados del Servicio de Angiología, Cirugía Vascular y Endovascular (ACV) del Hospital Universitario de Cabueñes (HUCAB) con la base de datos del Ministerio de Sanidad.Material y métodos: altas hospitalarias del servicio de ACV del HUCAB durante los años 2019, 2020 y 2021. Se utilizó el sistema all patients refined (APR)-GRD para la codificación de altas. Los indicadores clave estudiados fueron: número de altas, mortalidad, estancia media (EM) y peso medio (PM) del GRD. Se estudiaron los resultados globales por año y en función de los GRD más prevalentes. Los resultados obtenidos se cotejaron con los datos anuales de la codifi cación del conjunto mínimo básico de datos (CMBD) del Ministerio de Sanidad. Se analizó también la EM ajustada por el funcionamiento del estándar (EMAF) y por la casuística (EMAC), el índice de EM ajustada (IEMA), el índice funcional (IF) y casuístico (IC) y el número de estancias evitables.Resultados:el número de altas en 2020 disminuyó un 10 % respecto a 2019. Las altas ligadas a ingresos desde Urgencias aumentaron en el GRD 181 más de un 50 % durante el año 2020 y más del 100 % en el año 2021 con respecto a 2019. Respecto a la mortalidad, no se constató un aumento signifi cativo de forma global. La EM disminuyó un 20 % en 2020 y un 18 % en 2021 respecto a 2019. El PM aumentó de forma progresiva hasta alcanzar una media de 7,7 % en 2021. La EMAF fue superior a la EM estándar y el número de estancias ahorradas fue superior al esperado.Conclusiones: la pandemia por la COVID-19 ha infl uido sobre los indicadores hospitalarios estudiados: han disminuido el número de altas y la EM y ha aumentando el PM de los GRD. El número de estancias evitables ahorradas ha sido mayor que el estándar.(AU)

Objectives: to evaluate the impact of the COVID-19 on the hospital key performance indicators using the diagnosis-related groups (DRG). To compare the results of the Angiology and Vascular Surgery Department of the University Hospital of Cabueñes (HUCAB) with the database of the Ministry of Health.Material and methods: hospital discharges from the Vascular Surgery Department of the HUCAB during theyears 2019, 2020 and 2021. All patients refined (APR)-DRG system was extracted for discharge coding. The hospital key indicators studied were: number of discharges, mortality, mean stay (EM) and mean weight (PM) of the DRG. The overall results per year and according to the most prevalent DRGs were studied. The results obtained were compared with the annual data from the coding of the Minimum Basic Data Set (CMBD) of the Ministry of Health. The configured EM by adjusting the performance of the standard (EMAF) and by the casuistry (EMAC), the index of the adjusted EM (IEMA), the functional index (FI), casuistic index (CI) and the number of avoidable hospital stays were also analyzed. Results: number of discharges: it was 10 % inferior in 2020 compared to 2019. Discharges of the GRD 181 linked to admissions from the Emergency increased more than 50 % during 2020 and more than 100 % in 2021 compared to 2019. Mortality: there was no significant increase. EM: it decreased 20 % in 2020 and 18 % in 2021, compared to 2019. PM: it increased progressively to 7.7% on average in 2021. EMAF: it was superior to standard EM. The number of stays saved was higher than expected. Conclusions: the pandemic of COVID-19 influenced the hospital key performance indicators studied, reducing the number of discharges and ME and increasing the PM of the DRGs. The number of avoidable stays saved was greater than the standard.(AU)