Artificial Intelligence and Precision Medicine: A Perspective

In Silico Finite Element Modeling of Stress Distribution in Osteosynthesis after Pertrochanteric Fractures

A stabilization method of pertrochanteric femur fractures is a contentious issue. Here, we assess the feasibility of rapid in silico 2D finite element modeling (FEM) to predict the distribution of stresses arising during the two most often used stabilization methods: gamma nail fixation (GNF) and dynamic hip screw (DHS). The modeling was based on standard pre-surgery radiographs of hip joints of 15 patients with pertrochanteric fractures of type A1, A2, and A3 according to the AO/OTA classification. The FEM showed that the stresses were similar for both GNF and DHS, with the medians ranging between 53-60 MPa and consistently lower for A1 than A3 fractures. Stresses also appeared in the fixation materials being about two-fold higher for GNF. Given similar bone stresses caused by both GNF and DHS but shorter surgery time, less extensive dissection, and faster patient mobilization, we submit that the GNF stabilization appears to be the most optimal system for pertrochanteric fractures. In silico FEM appears a viable perioperative method that helps predict the distribution of compressive stresses after osteosynthesis of pertrochanteric fractures. The promptness of modeling fits well into the rigid time framework of hip fracture surgery and may help optimize the fixation procedure for the best outcome. The study extends the use of FEM in complex orthopedic management. However, further datasets are required to firmly position the FEM in the treatment of pertrochanteric fractures.

Functional Symmetry after Surgical Treatment of Pertrochanteric Fractures in the Elderly

Pertrochanteric fractures (PFs) in the elderly and their consequences are among the leading causes of disability; they significantly reduce the quality of life and lead to loss of independence. This article aims to determine the functional and radiological outcomes in a group of patients with PFs treated with either the Dynamic hip screw (DHS) or intramedullary Gamma nail fixation. A total of 618 patients, admitted to hospital for pertrochanteric fractures between 2015 and 2019, at a mean age of 82.40 (range 29–104) were screened. Finally, 78 patients were enrolled. Parameters related to hospital stay and surgery (length of hospital stay, surgery duration) were compared in both groups. Functional outcomes were assessed by the Harris hip score, subjective pain was measured with a visual analogue scale (VAS), and quality of life was evaluated using the EQ-5D-5L questionnaire. The obtained results were evaluated at 3- and 6-month follow-up. Radiographic parameters were measured based on the preoperative and postoperative standing anterior–posterior pelvic radiographs and axial projection of the hip at 6-month follow-up. The results showed no significant difference between groups treated either with DHS or intramedullary Gamma nail fixation within the scope of the variables under study. In conclusion, both analysed methods support the functional symmetry of the musculoskeletal system.

Surgical Safety Checklist: Polychromatic or Achromatic Design

The Surgical Safety Checklist (SSC) has been created based on the recommendations of the WHO and obligatorily introduced worldwide. SSC is used to increase the patient's safety and reduce complications while in the hospital, especially in the perioperative period. The original SSC template was of a multicolor polychromatic design. However, an achromatic black-and-white or gray-gray design on plain printer paper appears often used in clinical practice. This review aims to assess the level of SSC use in the polychromatic versus achromatic versions and the pros and cons of using either in practice. We used the Google browser for the identification and collection of SSC graphic images available as of June 2021 using the following search commands: "surgical safety checklist WHO" or "surgical safety checklist" or "SSC WHO." The commands were repeated in 103 languages representing the five continents with the back answers provided in 41 languages. The successive top 10 thematically relevant images or fewer if not available in the cases of some foreign languages were considered for analysis, providing a mean of 5 ±2 images per language. The numbers of achromatic and polychromatic two-color or multicolor images were calculated. The number of images corresponding to the respective color designs ranged as follows: 0-6 (27.6%), 0-9 (41.6%), and 0-6 (27.6%) We conclude that polychromatic imaging of SSC documents predominates in practical use. The polychromatic SSC design catches the doctor's eye, which likely increases the effectiveness of completing the document.

Human Recombinant DNase I (Pulmozyme®) Inhibits Lung Metastases in Murine Metastatic B16 Melanoma Model That Correlates with Restoration of the DNase Activity and the Decrease SINE/LINE and c-Myc Fragments in Blood Cell-Free DNA

Tumor-associated cell-free DNAs (cfDNA) play an important role in the promotion of metastases. Previous studies proved the high antimetastatic potential of bovine pancreatic DNase I and identified short interspersed nuclear elements (SINEs) and long interspersed nuclear elements (LINEs)and fragments of oncogenes in cfDNA as the main molecular targets of enzyme in the bloodstream. Here, recombinant human DNase I (commercial name Pulmozyme^®), which is used for the treatment of cystic fibrosis in humans, was repurposed for the inhibition of lung metastases in the B16 melanoma model in mice. We found that Pulmozyme^® strongly reduced migration and induced apoptosis of B16 cells in vitro and effectively inhibited metastases in lungs and liver in vivo. Pulmozyme^® was shown to be two times more effective when administered intranasally (i.n.) than bovine DNase I, but intramuscular (i.m.) administration forced it to exhibit as high an antimetastatic activity as bovine DNase I. Both DNases administered to mice either i.m. or i.n. enhanced the DNase activity of blood serum to the level of healthy animals, significantly decreased cfDNA concentrations, efficiently degraded SINE and LINE repeats and c-Myc fragments in the bloodstream and induced apoptosis and disintegration of neutrophil extracellular traps in metastatic foci; as a result, this manifested as the inhibition of metastases spread. Thus, Pulmozyme^®, which is already an approved drug, can be recommended for use in the treatment of lung metastases.