Protected: Peripheral hypoperfusion syndrome and monomielic syndrome: from diagnosis to treatment. Case report with review of the literature

Abstract

Arteriovenous access ischemic steal is a fairly uncommon complication associated with the creation of a vascular access for hemodialysis, which can sometimes cause potentially devastating complications, with permanent disability. Several old names for this syndrome have now been replaced by two new denominations: Hemodialysis Access-Induced Distal Ischemia (HAIDI) and Distal Hypoperfusion Ischemic Syndrome (DHIS).

Clinically, we distinguish between the Peripheral Hypoperfusion Syndrome, which can cause gangrene of the fingers, and the Monomelic Syndrome, characterized by low incidence and by the presence of neurological dysfunctions. Risk factors include diabetes mellitus, atherosclerotic vascular disease, old age, female gender, tobacco use and hypertension.

We report the case of a patient with HAIDI in order to increase awareness on this syndrome’s early diagnosis and proper management. After describing the case, we also include a literature review.

 

Keywords: hand Ischemia, vascular access, echocolordoppler, hemodialysis

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Brachial artery pseudoaneurysm: a rare but serious complication in hemodialysis patients with arteriovenous fistula

Abstract

A pseudoaneurysm or false aneurysm of the brachial artery is an uncommon occurrence in patients receiving hemodialysis with arteriovenous fistula (AVF).
We describe the case of a 76-year-old woman presenting with a large, tender, pulsatile mass in the right antecubital region 10 cm from the AVF. B-mode ultrasound examination revealed a saccular hematoma. Color doppler showed a recirculation movement of blood, creating a two colors image called “Korean flag”. The patient was transferred to the surgical unit where she first underwent ultrasound-guided compression and then surgical repair of the pseudoaneurysm. Two weeks after surgery the AVF was used again as an access for hemodialysis.
Differentiating between a false and a true aneurysm based on ultrasound is not always straightforward. Doppler ultrasound findings can be decisive for the early diagnosis of a pseudoaneurysm to ensure proper treatment planning given the dangerous complications of ruptures. Treatment options include: compression, percutaneous thrombin injection, endovascular exclusion with covered stents, aneurysmectomy and surgical repair.

KEYWORDS: Pseudoaneurysm, Brachial artery, Doppler ultrasound, Arteriovenous fistula.

Sorry, this entry is only available in Italian.

Superior Cava Vein stenosis in a hemodialysis patient with long-term central venous catheter and vascular graft: a case report

Abstract

Recently, the use of central venous catheters (CVC) as a vascular access in patients undergoing hemodialysis is significantly increased, mainly because of the aging of this population and the presence of several comorbidities. However, the implantation and the long stay of CVC are associated with many complications. Among them, central venous stenosis represents one of the most common problems that, if not properly diagnosed, could lead to vascular thrombosis and consequent vascular access malfunction.
Here, we report a case of a 38-year-old patient, who underwent hemodialysis firstly by a CVC long-term into right jugular vein and then by a prosthetic fistula in the ipsilateral limb. The patient presented many episodes of vascular access thrombosis that required endovascular interventions. The ultrasound screening and CT-angiography revealed an asymptomatic stenosis of the superior cava vein, which treatment with the implantation of vascular stent resulted in an initial improvement of vascular access performance. However, in the following months, a restenosis was observed that required new interventions to reestablish a satisfactory vascular access function.
This case highlights that patients on hemodialysis should undergo proper clinical and instrumental follow-up in order to prevent or early recognize vascular access complications.

KEYWORDS: echocolordoppler, hemodialysis, vascular access, graft.

Sorry, this entry is only available in Italian.