Puncture in Biological News

Freezing kidney cancer: Hot treatment should be new gold standard for destroying small tumors

... a frozen margin beyond the tumor edge to ensure death of the entire tumor. After the cryoprobe is removed, a small bandage is placed over the skin puncture site. Cryoablation, which can also be referred to as cryo or cryotherapy, is approved by the Food and Drug Administration for treating soft tissue ...

Microbot motors fit to swim human arteries

... is however not always avoidable and surgeons are often limited by, for example, the width of a catheter tube which, in serious cases, can fatally puncture narrow arteries. Remote controlled miniature robots small enough to swim up arteries could save lives by reaching parts of the body, like a ...

Ocean fish farming harms wild fish, study says

... their skin and sometimes deeper tissue. Skin is important to fish because they need to keep their tissues less salty than the ocean. Also, when lice puncture the skin they create an entry point for other infections. So wild fish weakened by lice have more difficulty finding food and escaping predators." ...

When threatened, a few African frogs can morph toes into claws

... June 23, 2008 Biologists at Harvard University have determined that some African frogs carry concealed weapons: When threatened, these species puncture their own skin with sharp bones in their toes, using the bones as claws capable of wounding predators. The unusual defense mechanism is described ...

Harvard researchers publish MRI images of genes in action in the living brain

... thinning of vascular walls in brains, which occurs as Alzheimers disease progresses. When people are sick, the last thing you want to do is puncture their skulls for a biopsy, said Gerald Weissmann, MD, Editor-in-Chief of The FASEB Journal, but sometimes this is unavoidable. These probes of genes ...

Scientists decipher mechanism behind antimicrobial 'hole punchers'

... cell. In the presence of the researchers antimicrobial molecules, the cone-shaped lipids gather together and curl into barrel-shaped openings that puncture the membrane. Cell death soon follows. The effectiveness of an antimicrobial molecule depends on both the concentration of cone-shaped lipids in the ...

Yale scientists use nanotechnology to fight E. coli

... but only when there was direct contact with aggregates of the SWCNTs that touched the bacteria. Elimelech speculates that the long, thin nanotubes puncture the cells and cause cellular damage. The study ruled out metal toxicity as a source of the cell damage. To avoid metal contaminants in ...

Sex is thirst-quenching for female beetles

... the costs and benefits of mating is essential to the mating behaviour of female bruchid beetles. The males have spines on their genitalia that puncture the females reproductive tract as they mate. Because of the damage this causes, females must carefully trade off the costs and benefits of mating, ...

No-scalpel vasectomies by skilled surgeons may speed recovery

... of making an incision, the no-scalpel technique uses a sharp instrument to puncture the skin. Advantages of puncturing rather than cutting the skin of the scrotum include less bleeding, bruising, infection and pain. Also, the puncture is usually so small that it does not require stitches. The review ...

New GI technologies improve internal organ visualization

... received thermal ablation, or clearing of the aortic valve. The repeat puncture of the cardiac walls and injection of contrast to help visualize the ... did not cause any visible vascular damage, though the 22g needle caused a puncture and the 19g needle caused limited bleeding. The contrast injection was ...

Does amateur boxing cause brain damage?

... boxing," said study author Max Hietala, MD, PhD, with Sahlgrenska University Hospital, Goteborg, Sweden. For the study, researchers used lumbar puncture to determine if there were elevated levels of biochemical markers for brain injury in the cerebrospinal fluid (CSF) of 14 amateur boxers. Boxers ...

Cryoablation -- A new treatment option for some kidney tumor patients

... 5 millimeters beyond the tumor edge to ensure death of the entire tumor. After the cryoprobes are removed, small bandages are placed over the skin puncture sites, and the patient spends one night in the hospital before returning home. Surgeons continue to seek less invasive methods than the ...

Bone marrow stem cells may heal hearts even years after heart attacks

... 20 to 30 percent. This therapy is safe, similar to an 'own blood injection or transfusion,' and has no side effects. It needs only bone marrow puncture and cell aspiration with subsequent stem cell preparation," he said. Although this study did not look at how stem cells may heal heart attack ...