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  • 1.
    Blomquist, Erik
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för immunologi, genetik och patologi, Experimentell och klinisk onkologi.
    Ronne Engström, Elisabeth
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Borota, Ljubisa
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi.
    Gál, Gyula
    Nilsson, Kristina
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för immunologi, genetik och patologi, Experimentell och klinisk onkologi.
    Lewén, Anders
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Montelius, Anders
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för immunologi, genetik och patologi, Medicinsk strålningsvetenskap.
    Grusell, Erik
    Isacsson, Ulf
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för immunologi, genetik och patologi, Medicinsk strålningsvetenskap.
    Enblad, Per
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Positive correlation between occlusion rate and nidus size of proton beam treated brain arteriovenous malformations (AVMs)2016Ingår i: Acta Oncologica, ISSN 0284-186X, E-ISSN 1651-226X, Vol. 55, nr 1, s. 105-112Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Proton beam radiotherapy of arteriovenous malformations (AVM) in the brain has been performed in Uppsala since 1991. An earlier study based on the first 26 patients concluded that proton beam can be used for treating large and medium sized AVMs that were considered difficult to treat with photons due to the risk of side effects. In the present study we analyzed the result from treating the subsequent 65 patients.

    MATERIAL AND METHODS: A retrospective review of the patients' medical records, treatment protocols and radiological results was done. Information about gender, age, presenting symptoms, clinical course, the size of AVM nidus and rate of occlusion was collected. Outcome parameters were the occlusion of the AVM, clinical outcome and side effects.

    RESULTS: The rate of total occlusion was overall 68%. For target volume 0-2cm(3) it was 77%, for 3-10 cm(3) 80%, for 11-15 cm(3) 50% and for 16-51 cm(3) 20%. Those with total regress of the AVM had significantly smaller target volumes (p < 0.009) higher fraction dose (p < 0.001) as well as total dose (p < 0.004) compared to the rest. The target volume was an independent predictor of total occlusion (p = 0.03). There was no difference between those with and without total occlusion regarding mean age, gender distribution or symptoms at diagnosis. Forty-one patients developed a mild radiation-induced brain edema and this was more common in those that had total occlusion of the AVM. Two patients had brain hemorrhages after treatment. One of these had no effect and the other only partial occlusion from proton beams. Two thirds of those presenting with seizures reported an improved seizure situation after treatment.

    CONCLUSION: Our observations agree with earlier results and show that proton beam irradiation is a treatment alternative for brain AVMs since it has a high occlusion rate even in larger AVMs.

  • 2.
    Borota, Ljubisa
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi.
    Gál, Gyula
    Jonasson, Per
    Ridderheim, Per-Åke
    Successful treatment of a ruptured aneurysm at the vertebral artery-posterior inferior cerebellar artery junction and simultaneous treatment of the stenotic vertebral artery with a single flow-diverting stent: a case report2014Ingår i: Journal of Medical Case Reports, ISSN 1752-1947, E-ISSN 1752-1947, Vol. 8, s. 172-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    INTRODUCTION:

    This is the first report on the simultaneous successful treatment of a large ruptured saccular aneurysm and stenotic parent artery with a single flow-diverting stent.

    CASE PRESENTATION:

    We report the case of a 68-year-old Caucasian man with occlusion of the right vertebral artery and a ruptured aneurysm at the junction of the left posterior inferior cerebellar artery-left vertebral artery that was successfully treated by the deployment of a single flow-diverting stent in the stenotic left vertebral artery. Stent deployment was complicated by thrombotic occlusion of the basilar artery, which was successfully reopened. The patient recovered completely, and follow-up angiography at 4 months and 1 year showed patent vertebral artery with gradual shrinkage of the aneurysm.

    CONCLUSIONS:

    This report contributes to the literature on treatment of large ruptured aneurysms localized in stenotic arteries and in areas of the endocranium where a mass of embolic material in the aneurysm (coils) might compromise the circulation in the parent blood vessel or compress vital brain structures.

  • 3.
    Borota, Ljubisa
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Jangland, Lars
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi. Department of Medical Physics, Uppsala University Hospital, Uppsala, Sweden.
    Åslund, Per-Erik
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi. Department of Medical Physics, Uppsala University Hospital, Uppsala, Sweden.
    Ronne-Engström, Elisabeth
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Nyberg, Christoffer
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Mahmoud, Ehab
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Sakaguchi, Takuya
    Patz, Andreas
    Spot fluoroscopy: a novel innovative approach to reduce radiation dose in neurointerventional procedures2017Ingår i: Acta Radiologica, ISSN 0284-1851, E-ISSN 1600-0455, Vol. 58, nr 5, s. 600-608Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Increased interest in radiation dose reduction in neurointerventional procedures has led to the development of a method called "spot fluoroscopy" (SF), which enables the operator to collimate a rectangular or square region of interest anywhere within the general field of view. This has potential advantages over conventional collimation, which is limited to symmetric collimation centered over the field of view.

    PURPOSE: To evaluate the effect of SF on the radiation dose.

    MATERIAL AND METHODS: Thirty-five patients with intracranial aneurysms were treated with endovascular coiling. SF was used in 16 patients and conventional fluoroscopy in 19. The following parameters were analyzed: the total fluoroscopic time, the total air kerma, the total fluoroscopic dose-area product, and the fluoroscopic dose-area product rate. Statistical differences were determined using the Welch's t-test.

    RESULTS: The use of SF led to a reduction of 50% of the total fluoroscopic dose-area product (CF = 106.21 Gycm(2), SD = 99.06 Gycm(2) versus SF = 51.80 Gycm(2), SD = 21.03 Gycm(2), p = 0.003884) and significant reduction of the total fluoroscopic dose-area product rate (CF = 1.42 Gycm(2)/min, SD = 0.57 Gycm(2)/s versus SF = 0.83 Gycm(2)/min, SD = 0.37 Gycm(2)/min, p = 0.00106). The use of SF did not lead to an increase in fluoroscopy time or an increase in total fluoroscopic cumulative air kerma, regardless of collimation.

    CONCLUSION: The SF function is a new and promising tool for reduction of the radiation dose during neurointerventional procedures.

  • 4.
    Borota, Ljubisa
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi.
    Mahmoud, Ehab
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi.
    Nyberg, Christoffer
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Ekberg, Tomas
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Öron-, näs- och halssjukdomar.
    Combined percutaneous and transarterial devascularisation of juvenile nasopharyngeal angiofibroma with protection of internal carotid artery: A modification of the technique2015Ingår i: Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences, ISSN 1591-0199, Vol. 21, nr 3, s. 390-396Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Juvenile nasal angiofibroma (JNA) is a hypervascularised, benign, but locally aggressive tumour that grows in the posterior, upper part of the nasal cavity and invades surrounding anatomical structures. The treatment of choice is surgical removal, but complete resection of the tumour can be hampered because of profuse perioperative bleeding. Preoperative embolisation of the tumour has been proposed as an effective method for prevention of perioperative bleeding, thereby shortening of the time of the operation. In this report of five cases, we describe successful preoperative devascularisation of the tumour by applying a modified method of direct intratumoural injection of the liquid embolic agent Onyx combined with protection of the internal carotid artery. The control of bleeding during the embolisation and occlusion of the maxillary or sphenopalatine artery was achieved by using a bi-luminal balloon catheter. Such use of the dual-lumen catheter in treatment of JNA has not been reported so far in the medical literature.

  • 5.
    Borota, Ljubisa
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Mahmoud, Ehab
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Nyberg, Christoffer
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Lewén, Anders
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Enblad, Per
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Ronne-Engström, Elisabeth
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Dual lumen balloon catheter - An effective substitute for two single lumen catheters in treatment of vascular targets with challenging anatomy2018Ingår i: Journal of clinical neuroscience, ISSN 0967-5868, E-ISSN 1532-2653, Vol. 51, s. 91-99, artikel-id S0967-5868(17)31621-1Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this study was to describe our experience in the treatment of various pathological conditions of the cranial and spinal blood vessels and hypervascularized lesions using dual lumen balloon catheters. Twenty-five patients were treated with endovascular techniques: two with vasospasm of cerebral blood vessels caused by subarachnoid hemorrhage, one with a hypervascularized metastasis in the vertebral body, two with spinal dural fistula, four with cerebral dural fistula, three with cerebral arteriovenous malformations, and 13 with aneurysms. The dual lumen balloon catheters were used for remodeling of the coil mesh, injection of various liquid embolic agents, particles and nimodipine, for the prevention of reflux and deployment of coils and stents. The diameter of catheterized blood vessels varied from 0.7 mm to 4 mm. Two complications occurred: perforation of an aneurysm in one case and gluing of the tip of balloon catheter by embolic material in another case. All other interventions were uneventful, and therapeutic goals were achieved in all cases except in the case with gluing of the tip of balloon catheter. The balloons effectively prevented reflux regardless of the type of the embolic material and diameter of blood vessel. The results of our study show that dual lumen balloon catheters allow complex interventions in the narrow cerebral and spinal blood vessels where the safe use of two single lumen catheters is either limited or impossible.

  • 6.
    Borota, Ljubisa
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för kirurgiska vetenskaper, Radiologi.
    Patz, Andreas
    Toshiba Medical Systems Europe, Zoetermeer, the Netherland.
    Flexible lateral isocenter: A novel mechanical functionality contributing to dose reduction in neurointerventional procedures2017Ingår i: Interventional Neuroradiology, ISSN 1591-0199, E-ISSN 2385-2011, Vol. 23, nr 6, s. 669-675Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aim of the study A new functionality that enables vertical mobility of the lateral arm of a biplane angiographic machine is referred to as the flexible lateral isocenter. The aim of this study was to analyze the impact of the flexible lateral isocenter on the air-kerma rate under experimental conditions. Material and methods An anthropomorphic head-and-chest phantom with anteroposterior (AP) diameter of the chest varying from 22 cm to 30 cm simulated human bodies of different body constitutions. The angulation of the AP arm in the sagittal plane varied from 35 degrees to 55 degrees for each AP diameter. The air-kerma rate (mGy/min) values were read from the system dose display in two settings for each angle: flexible lateral isocenter and fixed lateral isocenter. Results The air-kerma rate was significantly lower for all AP diameters of the chest of the phantom when the flexible lateral isocenter was used: (a) For 22 cm, the p value was 0.028; (b) For 25 cm, the p value was 0.0169; (c) For 28 cm, the p value was 0.01005 and (d) For 30 cm, the p value was 0.01703. Conclusion Our results show that the flexible lateral isocenter contributes significantly to the reduction of the air-kerma rate, and thus to a safer environment in terms of dose lowering both for patients and staff.

  • 7. Lindgren, Cecilia
    et al.
    Hultin, Magnus
    Koskinen, Lars-Owe D.
    Lindvall, Peter
    Borota, Ljubisa
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi.
    Naredi, Silvana
    ADMA Levels and Arginine/ADMA Ratios Reflect Severity of Disease and Extent of Inflammation After Subarachnoid Hemorrhage2014Ingår i: Neurocritical Care, ISSN 1541-6933, E-ISSN 1556-0961, Vol. 21, nr 1, s. 91-101Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Subarachnoid hemorrhage (SAH) is characterized by an inflammatory response that might induce endothelial dysfunction. The aim of this study was to evaluate if ADMA and arginine/ADMA ratios after SAH (indicators of endothelial dysfunction) are related to clinical parameters, inflammatory response, and outcome. Prospective observational study. ADMA, arginine, C-reactive protein (CRP), and cytokines were obtained 0-240 h (h) after SAH. Definition of severe clinical condition was Hunt&Hess (H&H) 3-5 and less severe clinical condition H&H 1-2. Impaired cerebral circulation was assessed by clinical examination, transcranial doppler, CT-scan, and angiography. Glasgow outcome scale (GOS) evaluated the outcome. Compared to admission, 0-48 h after SAH, the following was observed 49-240 h after SAH; (a) ADMA was significantly increased at 97-240 h (highest 217-240 h), (b) CRP was significantly increased at 49-240 h (highest 73-96 h), (c) interleukin-6 (IL-6) was significantly lower at 97-240 h (highest 49-96 h), p < 0.05. ADMA, CRP, and IL-6 were significantly lower and peak arginine/ADMA ratio was significantly higher in patients with H&H 1-2 compared to patients with H&H 3-5, p < 0.05. The peak ADMA or the nadir arginine/ADMA ratio did not differ significantly between patients with (55 %) or without (45 %) signs of impaired cerebral circulation. The peak ADMA or the nadir arginine/ADMA ratio did not differ significantly between patients with GOS 1-3 and patients with GOS 4-5. ADMA increased significantly after SAH, and the increase in ADMA started after the pro-inflammatory markers (CRP and IL-6) had peaked. This might indicate that endothelial dysfunction, with ADMA as a marker, is induced by a systemic inflammation.

  • 8. Lindvall, Peter
    et al.
    Borota, Ljubisa
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi. Department of Neurosurgery, Umeå University Hospital, Umeå, Sweden.
    Birgander, Richard
    Jonasson, Per
    Ridderheim, Per-Åke
    Long-term follow-up of intracranial aneurysms treated with endovascular coiling: experience from one institution2012Ingår i: Vascular and endovascular surgery, ISSN 1938-9116, Vol. 46, nr 4, s. 325-328Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND:

    Our aim was to evaluate the long-term treatment results in patients with intracranial aneurysms treated with endovascular techniques.

    METHODS:

    Forty-four patients treated due to intracranial aneurysms between 1996 and 2002 were investigated with a time-of-flight sequence magnetic resonance angiography (TOF MRA).

    RESULTS:

    Depending on the assessment, 47% to 51% of the treated aneurysms had a residual neck at the last digital subtraction angiography follow-up. There was filling of the aneurysm base (2%) in only 1 patient, whereas the remaining aneurysms were totally occluded. A TOF MRA performed 6 to 14 (mean 9.68) years after the last procedure showed a stable result in 93.9% of the treated aneurysms. There were no de novo aneurysms and previously untreated aneurysms were unchanged in size.

    CONCLUSION:

    Our long-term follow-up showed a stable result in previously coiled intracranial aneurysms.

  • 9.
    Ronne-Engström, Elisabeth
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Borota, Ljubisa
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi.
    Kothimbakam, Raj
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för radiologi, onkologi och strålningsvetenskap, Enheten för radiologi.
    Marklund, Niklas
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Lewén, Anders
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Enblad, Per
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för neurovetenskap, Neurokirurgi.
    Outcome from spontaneous subarachnoid haemorrhage: results from 2007-2011 and comparison with our previous series2014Ingår i: Upsala Journal of Medical Sciences, ISSN 0300-9734, E-ISSN 2000-1967, Vol. 119, nr 1, s. 38-43Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objectives

    The management of patients with spontaneous subarachnoid haemorrhage (SAH) has changed, in part due to interventions now being extended to patients who are older and in a worse clinical condition. This study evaluates the effects of these changes on a complete 5-year patient material.

    Methods

    Demographic data and results from 615 patients with SAH admitted from 2007 to 2011 were put together. Aneurysms were found in 448 patients (72.8%). They were compared with the aneurysm group (n = 676) from a previously published series from our centre (2001-2006). Linear regression was used to determine variables predicting functional outcome in the whole aneurysm group (2001-2011).

    Results

    Patients in the more recent aneurysm group were older, and they were in a worse clinical condition on admission. Regarding younger patients admitted in World Federation of Neurosurgical Societies SAH grading (WFNS) 3, there were fewer with a good outcome. In the whole aneurysm group 2001-2011, outcome was best predicted by age, clinical condition at admission, and the size of the bleeding, and not by treatment mode or localization of aneurysm.

    Conclusion

    It seems important for the outcome that aneurysms are treated early. The clinical course after that depends largely on the condition of the patient on admission rather than on aneurysm treatment method. This, together with the fact that older patients and those in worse condition are now being admitted, increases demands on neurointensive care. Further improvement in patient outcome depends on better understanding of acute brain injury mechanisms and improved neurointensive care as well as rehabilitation measures.

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