A bionic soft robotic glove mimicking finger actions based on sEMG recognition

Compared with rigid robots, soft robotics is more suitable to develop anthropomorphic digits that mimics the biological structures and dexterous motions of human finger. This study proposed a surface electromyogram (sEMG) sensors-based soft robotic glove system which was able to recognize the finger activities and execute the same operation via the bionic glove. Finger activities can be recognized by using electrodes sensors to monitor the electric potential variations on specific surface of the forearm muscle regions. A hybrid robotic digit was designed that utilizes pneumatic bellow actuators to satisfy the anatomical range of the finger motion in order to mimic finger action according to sEMG information. The moving trajectory of digit tip and the range motion of each joint of the robotic digit were measured in experiments under the pressure from 0kPa to 70kPa. The bionic soft robotic glove successfully demonstrated the finger action recognition and robotic digits controlling for a variety of manipulation tasks. The feasible results provided a novel technique for controlling the soft robotic glove through sEMG signals holistically and practically, and also give inspiration and guidance for multiple fingers remote operational applications.

Acute intussusception in adults; study of two observations at the Friendship Hospital Sino-Guinean in Kipe

Aim The study aim to make our contribution to the study of intussusception in adults, rare pathology in adults, acute intussusception also called (AII) refers to penetration of an intestinal segment into the underlying segment, by turning into a glove finger (invagination roll). The aim of this work is to report two cases of acute intussusception in adults in the surgical department of the Sino-Guinean friendship hospital in kipe. Republic of Guinea. Material and Method This is a prospective two-year study, running from October 1, 2018 to September 30, 2020 Inclusive. All patients admitted for operated for acute intestinal invagination, whose age is between 25 and 50 years were included in our study. The operative specimen was analyzed anatomo pathologically after fixation with 10 percent formalin. Clinical presentation It concerned a man and a woman, in both cases the localization was ileal. Treatment was surgical and consisted of ileal resection followed by end-to-end ileoileale anastomosis in two planes. The operative consequences were simple. Conclusion Acute intussusception in adults is rare, the symptoms are noisy.

The Treatment of a Dental Morphological Anomaly Type Dens in Dente A challenge

Dens in dente or the amelo-dentinal invagination is met rarely and involves, almost in exclusivity, the upper lateral incisisors, usually unilateral, being an invagination in glove finger of the enamel in dentine, on the level of a tooth often dismorphic. The radiologic aspect is of candle flame, occupying the central part of an upper lateral incisor.

A First-Order Design Requirement to Prevent Edema in Mechanical Counter-Pressure Space Suit Garments

ABSTRACTIntroductionMechanical counter-pressure (MCP) space suits may provide enhanced mobility relative to gas-pressure space suits. One challenge to realizing operational MCP suits is the potential for edema caused by spatial variations in the applied body-surface pressure (dP). We determined a first-order requirement for these variations.MethodsDarcy’s law relates volume flux, of fluid from capillaries to the interstitial space, to transmural hydraulic and osmotic pressure differences. Albumin and fibrinogen levels determine, to first order, the capillary oncotic pressure (COP). We estimated dP, neglecting hydrostatic pressure differences, by equating the volume flux under MCP and under normal with the volume flux under abnormal variations in COP; then we compared these estimates to results from MCP garment studies.ResultsNormal COP varies from 20-32 mm Hg; with constant hydraulic conductivity, dP≈12 mm Hg. In nephrotic syndrome, COP may drop to 11 mm Hg, yielding dP≈15 mm Hg relative to mid-normal COP. Previous studies found dPmax =151 mm Hg (MCP glove; finger and hand dorsum relative to palm), dPmax=51 mm Hg (MCP arm; finger, hand dorsum, and wrist relative to arm), and dP=52, 90 and 239 mm Hg (three MCP lower leg garments).ConclusionsMCP garments with dPmax≤12 mm Hg are unlikely to produce edema or restrict capillary blood flow; however, garments with dPmax>12 mm Hg will not necessarily produce edema. For example, the hydrostatic pressure gradient at the feet in 1g can range from 70-90 mm Hg. Current garment prototypes do not meet our conservative design requirement.