Examination by a Nephrologist

Our team of specialists carries out physical examinations of patients with all types of kidney disease. Patients are interviewed during examinations in order to determine their symptoms related to the kidneys, urinary tracts and the entire excretory system. Ultrasound scans are conducted where necessary. Laboratory tests are ordered. Treatment and dietary regimen are prescribed. Functional tests to determine renal function and type of renal impairment may also be required in some cases.


Haemodialysis is a treatment replacing renal function. It is used when the patient’s kidneys no longer work. Haemodialysis takes place outside the body with blood circulated through a semi-permeable membrane separating wastes and excess liquids. Haemodialysis is carried out at the Kidney Center three times per week for four hours.

Peritoneal Dialysis

Peritoneal dialysis is a treatment that replaces the renal function and maintains the residual renal function. Peritoneal dialysis takes place inside the body. Wastes and excess liquids are filtered through the peritoneum – a thin elastic membrane lining the abdominal cavity and internal organs, which has a very rich blood supply. This treatment preserves residual renal function and urine production. It is usually carried out at the patient's home.

Individual Treatment Plan

An individual treatment plan is prepared for each patient according to their health condition. Using a personalized therapeutic approach ensures optimal treatment for each stage of the disease.

Kidney and Abdominal Ultrasound

An ultrasound scan displays in real time the kidneys, urinary tract, bladder, prostate and other internal organs. Insight is gained into changes in their form, structure and function. The examination is painless and safe for the patient. Other imaging studies, such as X-rays, computed tomography and magnetic resonance imaging, are ordered where necessary.

Kidney Doppler Ultrasound

A kidney Doppler examination is a specialized ultrasound examination of the blood vessels. Pulsations and blood flow velocity in the arteries and veins are represented graphically and audibly. The examination is used to assess impaired blood supply in tissues, active autoimmune processes and acute renal transplant rejection.


Uroflowmetry is a non-invasive, painless and safe examination of urine flow used to determine the volume of excreted urine over a given time and the flow rate. The method provides information about the function of the lower urinary tract (urethra and bladder). Uroflowmetry is also used in cases of prostate size change.

Medical Documentation Analysis

The nephrologist performs an evaluation of laboratory test results and presented medical reports and documentation. The approach is used for patients with reduced mobility as well as patients requesting a second opinion from a nephrologist.


Prof. Valentin Ikonomov and his team perform diagnostics and treatment of all types of kidney disease and commonly related complications such as high blood pressure, diabetic kidney disease, high blood fat, anemia, gout, proteinuria, bone disease, metabolic disorders and kidney failure.

Nephrologists at the Kidney Center use modern imaging studies and laboratory diagnostics to determine accurately each patient’s condition. Individual treatment plans aimed at avoiding and delaying disease complications are developed in cooperation with the patient. 

Patients with every stages of chronic kidney disease are treated at the Kidney Center. Renal replacement therapy with hemodialysis or peritoneal dialysis is performed in patients with end-stage renal disease.


Prof. Dr. Valentin Ikonomov, Ph.D.

Prof. Ikonomov graduated from Higher Medical Institute – Varna in 1985. He has worked since 1990 as Scientific Assistant at the Scientific Institute of Nephrology, Dialysis and Kidney Transplantation at University hospital “Aleksandrovska”, Medical University Sofia and as Head of the Clinical Center for Hemodialysis in Albena, Bulgaria.

Dr. Ivelina Nikolova

Dr. Nikolova graduated from the Medical Faculty of the Thracian University, Stara Zagora in 2014 and worked at the Clinic of Internal Medicine at “St. Anna” Hospital, Varna.

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Dr. Raya Todorova

Graduated from Medical University “Prof. Dr. Paraskev Stoyanov” Varna in 2019 and joined as member of the Bulgarian physicians association.

Dr. Plamena Svetoslavova

Graduated from Medical University “Prof. Dr. Paraskev Stoyanov” Varna in 2019. Joined the team at Kidney center immediately after graduation. Member of the Bulgarian physicians association.

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peritoneal dialysis
Peritoneal Dialysis

Peritoneal Dialysis

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