Advertisement

Topics

Determining the region of origin of blood spatter patterns considering fluid dynamics and statistical uncertainties.

07:00 EST 15th February 2019 | BioPortfolio

Summary of "Determining the region of origin of blood spatter patterns considering fluid dynamics and statistical uncertainties."

Trajectory reconstruction in bloodstain pattern analysis is currently performed by assuming that blood drop trajectories are straight along directions inferred from stain inspection. Recently, several attempts have been made at reconstructing ballistic trajectories backwards, considering the effects of gravity and drag forces. Here, we propose a method to reconstruct the region of origin of impact blood spatter patterns that considers fluid dynamics and statistical uncertainties. The fluid dynamics relies on defining for each stain a range of physically possible trajectories, based on known physics of how drops deform, both in flight and upon slanted impact. Statistical uncertainties are estimated and propagated along the calculations, and a probabilistic approach is used to determine the region of origin as a volume most compatible with the backward trajectories. A publicly available data set of impact spatter patterns on a vertical wall with various impactor velocities and distances to target is used to test the model and evaluate its robustness, precision, and accuracy. Results show that the proposed method allows reconstruction of bloodletting events with distances between the wall and blood source larger than ∼1 m. The uncertainty of the method is determined, and its dependency on the distance between the blood source and the wall is characterized. Causes of error and uncertainty are discussed. The proposed method allows the consideration of stains indicating impact velocities that point downwards, which are typically not used for determining the height of the origin. Based on the proposed method, two practical recommendations on crime scene documentation are drawn.

Affiliation

Journal Details

This article was published in the following journal.

Name: Forensic science international
ISSN: 1872-6283
Pages: 323-331

Links

DeepDyve research library

PubMed Articles [19439 Associated PubMed Articles listed on BioPortfolio]

Impact Spatter Bloodstain Patterns on Textiles.

There are few reports of studies of impact spatter on textiles even though bloodstained textiles are found at many violent scenes. Impact spatter was deposited at 90° impact angle onto three knit fab...

Heterogeneity in Tobacco-Use Behaviors Among U.S. Blacks per Global Region of Origin.

Heterogeneity in tobacco-use behaviors among U.S. blacks by global region of origin and age at immigration was examined. Self-identified black participants from the 2006-2015 Tobacco Use Supplement to...

Amniotic fluid as a potent activator of blood coagulation and platelet aggregation: Study with rotational thromboelastometry.

Pulmonary thromboembolism (PTE) is a leading cause of maternal death and frequently occurs during early puerperium. Amniotic fluid components are frequently observed in the maternal circulation in par...

Euvolemia-A critical target in the management of acute kidney injury.

It has been clearly established that critically ill patients with sepsis require prompt fluid resuscitation. The optimal amount of fluid and when to taper this resuscitation is less clear. There is a ...

Proliferative Index in Pediatric Pilocytic Astrocytoma by Region of Origin and Prediction of Clinical Behavior.

Pilocytic astrocytomas are common pediatric tumors. Molecular profiles vary with location of origin. Comparisons of proliferation have not been reported. We sought to identify differences in growth by...

Clinical Trials [9270 Associated Clinical Trials listed on BioPortfolio]

Assessment of Treatment Patterns of Severe Asthmatic Patients Across the Gulf Region - SevEos Study

SevEos is a cross-sectional, multi-center, non-interventional study aimed to describe the treatment patterns in 250 severe asthma patients across the Gulf region. In addition, the study wi...

Fluid Day Spanish Observational Study

Perioperative fluid therapy has undergone a huge change in clinical practice in recent years. The patterns of replacement and / or restoration of volemia described in the classic anaesthes...

Fluid-dynamics in Bifurcation PCI

Investigator-initiated, international, multicentre, observational study with two cohorts. The two study cohorts will be: Cohort A: to understand if the local blood flow patterns (associa...

Time Course Evolution of Cardiac Output

Fluid expansion is the first therapeutic option in patients presenting acute circulatory failure but the duration of its hemodynamic effects (persistency and time of maximal increase in ca...

Effect of Fluid Challenge on Glycocalyx

Interventional study comparing effect of two regimes of fluid challenge in patients with sepsis and in patients undergoing elective major surgery on glycocalyx by using perfused Boundary R...

Medical and Biotech [MESH] Definitions

Method for determining the circulating blood volume by introducing a known quantity of foreign substance into the blood and determining its concentration some minutes later when thorough mixing has occurred. From these two values the blood volume can be calculated by dividing the quantity of injected material by its concentration in the blood at the time of uniform mixing. Generally expressed as cubic centimeters or liters per kilogram of body weight.

Abnormal accumulation of serous fluid in two or more fetal compartments, such as SKIN; PLEURA; PERICARDIUM; PLACENTA; PERITONEUM; AMNIOTIC FLUID. General fetal EDEMA may be of non-immunologic origin, or of immunologic origin as in the case of ERYTHROBLASTOSIS FETALIS.

The body fluid that circulates in the vascular system (BLOOD VESSELS). Whole blood includes PLASMA and BLOOD CELLS.

That region of the immunoglobulin molecule that varies in its amino acid sequence and composition, and comprises the binding site for a specific antigen. It is located at the N-terminus of the Fab fragment of the immunoglobulin. It includes hypervariable regions (COMPLEMENTARITY DETERMINING REGIONS) and framework regions.

Inorganic salts that contain the -HCO3 radical. They are an important factor in determining the pH of the blood and the concentration of bicarbonate ions is regulated by the kidney. Levels in the blood are an index of the alkali reserve or buffering capacity.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article