The ACIST power injection system reduces the amount of contrast media delivered to the patient, as well as fluoroscopy time, during diagnostic and interventional cardiac procedures

Objectives To evaluate the feasibility and safety of power injection of contrast media through totally implantable venous power ports during computed tomography scans in oncologic patients. Methods The study population consisted of 417 patients who underwent computed tomography scan through a totally implantable venous power port. Clinical data were examined. Logistic regression analysis was used to assess the associations between clinical covariables and computed tomography scan failure. Results Successful computed tomography scans were achieved in 534 of 540 examinations (98.9%). Logistic regression analysis showed that contrast media above a 350 concentration was significantly associated with computed tomography scan failure (95% confidence interval: 1.01–1.13, p = 0.012). No major complications were noted. Conclusions Power injection of contrast media through a totally implantable venous power port for computed tomography examination is feasible and safe. This procedure provides an acceptable alternative in oncologic patients with inadequate peripheral intravenous access when computed tomography examination with contrast enhancement is needed.

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Contrast Media and Mechanical Power Injection

Journal of Radiology Nursing ◽

10.1016/j.jradnu.2005.04.007 ◽

2005 ◽

Vol 24 (2) ◽

pp. 33

Author(s):

Nancy Costa

Keyword(s):

Contrast Media ◽

Mechanical Power ◽

Power Injection

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Multicentric survey of patient doses in fluoroscopy guided diagnostic and interventional cardiac procedures: comparison with Diagnostic Reference Levels and follow-up levels for patients at risk for radiation induced skin effects

Bulgarian Cardiology ◽

10.3897/bgcardio.26.e52193 ◽

2020 ◽

Vol 26 (1) ◽

pp. 44-52

Author(s):

Anna Zagorska ◽

Desislava Ivanova ◽

Dessislava Kostova-Lefterova ◽

Filip Simeonov ◽

Valeri Gelev ◽

...

Keyword(s):

At Risk ◽

Coronary Intervention ◽

Fluoroscopy Time ◽

Diagnostic Reference Levels ◽

Reference Levels ◽

Cardiac Procedures ◽

Patients At Risk ◽

Radiation Induced ◽

Patient Doses

Introduction. Interventional cardiac procedures are often associated with high patient exposure and therefore require special care in protecting patients from radiation-induced effects. Materials and methods. A retrospective study of typical patients’doses was performed in nine hospitals, with a total number of fourteen angiography systems. The typical values for kerma-area product (KAP), cumulative dose (CD) and fluoroscopy time (FT) for two of the most commonly performed procedures - percutaneous coronary intervention (PCI) and coronary arteriography (CA), were calculated and compared with the Bulgarian National Diagnostic Reference Levels (NDRL). Data analysis, regarding the risk of radiation-induced skin effects due to interventional cardiac procedures, was performed. Aim. 1) to present and analyze the typical KAP values for PCI and CA procedures in cardiology departments with high workload and to compare them with the NDRL; 2) to compare the patient doses with the follow-up levels published in Ordinance 2, to identify patients at risk for radiation-induced effects. Results. The results show that typical values for PCI and CA procedures for some of the angiography systems are higher than the NDRL. In all investigated departments there are patients with at least one exceeded follow-up level for PCI. Conclusions. The results show a potential for optimization in the departments with both high or very low typical dose or FT values. No radiation-induced effect was observed in the followed-up group of patients. The introduction of procedure with "Instruction to the patient after an interventional cardiac procedure(s) with greater complexity and a long fluoroscopy time" for patient follow-up and its regular implementation into the routine clinical practice will help for timely diagnosis and treatment of radiation-induced skin effects after cardiac procedures under fluoroscopy control.

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ANN based LFC with Coordination strategies of DERs in Hybrid Isolated Micro-Grid Environment

E3S Web of Conferences ◽

10.1051/e3sconf/202130901036 ◽

2021 ◽

Vol 309 ◽

pp. 01036

Author(s):

Srikanth Boyini ◽

Srividya Devi Palakaluri ◽

Rekha Mudundi

Keyword(s):

Power System ◽

Frequency Control ◽

Active Power ◽

Load Frequency Control ◽

Injection System ◽

Renewable Energy Resources ◽

Interconnected System ◽

Load Frequency ◽

Power Injection ◽

Micro Grid

This paper provides a load frequency control (LFC) of a micro grid with renewable energy resources (RES). The operation of micro grid with a low inertia system leds to disturbances in power system. The disturbances in frequency is more in micro grid than conventional power system. So there should be a fast recovery of changes in frequency with existing system and interconnected system (RES). Active power injection is the main scheme to control frequency of a system. The matlab simulink tells us that different active power injection system contribute for the fast control of grid frequency with PID controller. The use of ANN technology to this system the load frequency control can be illustrated in faster rate of its recovery. An ANN controller is investigated which handles the inputs collectively in each sector of the power system. Back-transmission time is normally used in the study for neural network education. The performance of the power system is simulated independently with a typically integrated conventional controller and ANN controller. A complete spectrum of small signals is introduced for RESs in the isolated microgrid and a correct role in frequency control studies is taken into account.

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