Stress analysis of pectus carinatum

Celem pracy jest wyznaczenie stanu naprężeń kurzej klatki piersiowej człowieka podczas zabiegu resuscytacji krążeniowo–oddechowej. Na podstawie projekcji tomografii komputerowej trzynastoletniego chłopca opracowano w środowisku MIMICS model 3D. Uzyskany model powierzchniowy przekonwertowano na model objętościowy w środowisku Ansys, w którym przeprowadzono symulacje resuscytacji wyznaczając dopuszczalny zakres sił używanych przez ratowników medycznych

Influence of mechanical damage on corrosion resistance of plates used in funnel chest treatment

The paper presents influence of mechanical surface damage on corrosion resistance of plates made of Cr-Ni-Mo stainless steel, used in funnel chest treatment. The surface of the steel was electrochemically polished and fitted. The surface damage is induced in the given deformation regions and is a potential reason of corrosion. The corrosion tests were realised by recording of anodic polarization curves with the use of the potentio-dynamic method. The VoltaLab® PGP 201 system for electrochemical tests was applied. Additionally, the tests showed that the structure of the steel the plates were made of, met the PN-ISO 5832-1 standard. On the basis of the obtained results it can be stated that that stainless steel can be applied in funnel chest treatment

The study of physicochemical properties of stabilizing plates removed from the body after treatment of pectus excavatum

This paper presents the results of a physicochemical surface study and clinical observation of a new generation of plates for the treatment of pectus excavatum. Analysis of the data allowed us to investigate the effect of implant design and condition of their surface on the results of treatment of pectus excavatum. In the study, we performed an analysis of clinical data, obtained after a suitable period of treatment with the use of implants, as well as a study of physicochemical properties of stabilizing plates after their removal from the body. Surface roughness, the surface wettability and corrosion resistance were measured, and the results were compared with clinical observations. When removing the plates we found only slight inflammatory-periosteal reactions around the wire fixing transverse stabilizing plates to the ribs and locking the base plate correcting the distortion. The corrective plates did not shift or rotate during the entire treatment period, giving an optimal, oval and natural shape of the chest. The obtained values of the parameters investigated indicate that the reduction in resistance to pitting corrosion occurred in the areas where laser marking was made to identify the plate. The remaining plates, in spite of mechanical damage of the surface, were characterized by good corrosion resistance, a fact which is confirmed by the results of clinical evaluation

Numerical analysis of the impact load on the deformation of the chest

Resuscytacja jest zbiorem metod mających na celu zahamowanie i odwrócenie procesu umierania. Przywrócenie krążenia krwi odbywa się poprzez zewnętrzny masaż serca. Polega on na rytmicznym uciskaniu ściany klatki piersiowej. Źle zlokalizowana, lub zbyt duża siła nacisku może spowodować złamanie żeber, co w konsekwencji prowadzić może do uszkodzenia narządów wewnętrznych. W pracy podjęto próbę analizy stanu naprężeń klatki piersiowej, podczas masażu serca, dla pacjenta z lejkowatą klatką piersiową.Resuscitation is a set of methods to curb and reverse the dying process. Restoration of blood circulation is done by external cardiac massage. It consists of applying rhythmic pressure to the chest wall. However, if poorly located, or used with too much force, it can cause the fracture of ribs, which in turn can lead to damage to internal organs. The paper attempts to analyze the stress state of the chest during chest compressions for a patient with a funnel chest

Corrosion Resistance, EIS and Wettability of the Implants Made of 316 LVM Steel Used in Chest Deformation Treatment

The paper presents the influence of mechanical surface damage on the physicochemical properties of plates after implantation made of CrNiMo stainless steel, used in the treatment of anterior surface deformity of the chest. Analysis of the data allowed us to investigate the effect of implant design and condition of their surface on the results of chest deformation treatment. Results of electrochemical, impedance and surface wettability tests and SEM observations were compared with clinical observations. When removing the plates we found only slight inflammatory-periosteal reactions. On the basis of obtained results, it can be stated that plates, in spite of mechanical damage of the surface, were characterized by good corrosion resistance, a fact which is confirmed by the results of clinical evaluation

Corrosion Resistance, EIS and Wettability of the Implants Made of 316 LVM Steel Used in Chest Deformation Treatment

The paper presents the influence of mechanical surface damage on the physicochemical properties of plates after implantation made of CrNiMo stainless steel, used in the treatment of anterior surface deformity of the chest. Analysis of the data allowed us to investigate the effect of implant design and condition of their surface on the results of chest deformation treatment. Results of electrochemical, impedance and surface wettability tests and SEM observations were compared with clinical observations. When removing the plates we found only slight inflammatory-periosteal reactions. On the basis of obtained results, it can be stated that plates, in spite of mechanical damage of the surface, were characterized by good corrosion resistance, a fact which is confirmed by the results of clinical evaluation

Experimental biomechanical assessment of plate stabilizers for treatment of pectus excavatum

The paper discusses results of experimental research involving new generation of plate stabilizers used for the treatment of deformation of the front chest wall. Previous clinical monitoring revealed instances of minimal rotation, which caused destabilization of the anastomosis and pain in patients. In order to prevent this, transverse stabilizing plates were introduced to the structure of the stabilizer. The new structure of stabilizers was tested using two specially prepared research posts: 1 – which enables fastening of the plate stabilizers to a platform simulating human ribs, 2 – using a pig chest, to which plates were fastened according to the stabilization conditions in the stabilizer–chest structure. The tests recorded displacement values in selected areas of the plates in response to applied loading forces