The ChorioAnchor: Design and Testing of a Novel Chorioamniotic Anchoring Device to Enable Percutaneous Fetoscopic Surgery.

INTRODUCTION: Percutaneous fetoscopic surgery is hampered by an increased risk of preterm prelabor rupture of membranes (PPROM). Recent surgical techniques have shown that suturing the chorioamniotic membranes following laparotomy and uterine exteriorization is associated with a lower risk of PPROM compared to percutaneous in utero surgery. This study presents the ChorioAnchor, a novel resorbable device that percutaneously anchors the chorioamniotic membranes to the uterine wall. METHODS: Human factors testing and peel tests were used to simulate the worst-case in-use loading conditions, establishing the device strength requirements. Tensile testing was used to measure the time-zero strength of the device. Porcine cadaver testing was used to examine ultrasound visibility and acute handling characteristics. Short-term host response was examined through an acute 7-day implantation study in a rabbit model. RESULTS: With a time-zero tensile strength of 47 N, the ChorioAnchor exceeded the established 4 N strength requirement. Both the ChorioAnchor and delivery device were seen to be clearly visible under ultrasound imaging. Short-term host response to the device was well within the range expected for this type of device. CONCLUSION: The ChorioAnchor meets its engineering requirements in the early stages of implantation. Future studies will examine the kinetics of degradation of the device in vitro and in vivo.

Chen Ziying and Woods Hole: Bringing the Marine Biological Laboratory to Amoy, China, 1930-1936.

This article examines Chen Ziying, an American-trained Chinese biologist and his prewar efforts to bring his Woods Hole experience from the United States to China between 1930 and 1936. I argue that the Marine Biological Laboratory (MBL) appears as a prominent American scientific institution in the twentieth century among visiting Chinese students and scholars who were drawn to the American approach of building world-class seaside laboratories to facilitate marine biological study while cultivating a collaborative culture via songs of biology. Chen was one of the leading US-trained Chinese scientists who aspired to the international trend of developing coastal biology in the early twentieth century and was determined to modernize China's discipline-building of biology with the construction of marine research facilities similar to the MBL. I show that Chen's efforts of bringing the MBL practice to China took place at a time when science in China was overshadowed by the impulse of nationalism. Despite the nationalistic rhetoric, Chen was able to establish a Chinese connection with Woods Hole by introducing the MBL cultural practices of songs with biological significance. Lyrics from popular biological songs such as "It's a Long Way from Amphioxus" and "Songs of Amoy" reflect not just Darwinian themes but also a transnational connection between American and Chinese biologists in Republican-era China--a period in modern Chinese history that is often characterized by soaring sentiments of nationalism. This paper sets out to reconsider the interplay of scientific nationalism and scientific internationalism in shaping marine science in modern China, as well as to reflect on the meanings of value-laden terms such as "nationalism" and "foreignness" and their conceptual impacts on writing the historiography of biology in twentieth-century China.

Radium, biophysics, and radiobiology: tracing the history of radiobiology in twentieth-century China.

Radiobiology assesses the biological hazards of exposure to radioactive substances and nuclear radiation. This article explores the history of radiobiology in twentieth-century China by examining the overlapping of radium research and biophysics, from roughly the 1920s Nationalist period to the 1960s Communist period; from the foreign purchase of radium by the Rockefeller Foundation's China Medical Board during the Republican era, to the institutional establishment of radiobiology as a subset of biophysics in the People's Republic. Western historiography of radiobiology highlights the connection between the military development of nuclear weapons and the civilian use of radiation in biology, as well as the international export of radioisotopes and nuclear reactors. Considering the exclusion of China from Western atomic diplomacy, I argue that the study of the Chinese history of bomb-making and radiobiology is necessary not just to fill an existing knowledge gap, but more importantly to elucidate the influence of the Chinese nuclear weapons program and Cold War atomic politics on Chinese life-science enterprises. Through examining the formational history of the radiobiology program in China, I hope to shed light on the implications of the atomic age for Chinese biology in the twentieth century.