Lung transplantation through controlled donation after circulatory death (cDCD) has slowly gained universal acceptance with reports of equivalent outcomes to those through donation after brain death. ...In contrast, uncontrolled DCD (uDCD) lung use is controversial and requires ethical, legal and medical complexities to be addressed in a limited time. Consequently, uDCD lung use has not previously been reported in the United States. Despite these potential barriers, we present a case of a patient with multiple gunshot wounds to the head and the body who was unsuccessfully resuscitated and ultimately became an uDCD donor. A cytomegalovirus positive recipient who had previously consented for CDC high‐risk, DCD and participation in the NOVEL trial was transplanted from this uDCD donor, following 3 h of ex vivo lung perfusion. The postoperative course was uneventful, and the recipient was discharged home on day 9. While this case represents a “best‐case scenario,” it illustrates a method for potential expansion of the lung allograft pool through uDCD after unsuccessful resuscitation in hospitalized patients.
The authors discuss their experience and consideration of logistical, legal, and ethical factors in uncontrolled DCD lung transplantation in the United States.
The present status of hypernuclear
γ-ray spectroscopy with Hyperball is summarized. We observed two
γ transitions of
16
Λ
O(
1
−
→
1
−
,
0
−
) and obtained the strength of the
ΛN tensor force. In
...10B(
K
−
,
π
−
γ
) data, we did not observe the spin-flip M1 transition of
10
Λ
B(
2
−
→
1
−
), but
γ rays from hyperfragments such as
7
Λ
Li(
7
/
2
+
→
5
/
2
+
) and
9
Λ
Be(
3
/
2
+
→
1
/
2
+
) were observed. In
11B(
π
+
,
K
+
γ
) data, we observed six
γ transitions of
11
Λ
B. We also attempted an inclusive
γ-ray measurement with a stopped
K
−
beam.
Diamond targets for hyperon interaction studies Alburger, D.E.; May, M.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
03/2000, Letnik:
443, Številka:
1
Journal Article
Recenzirano
When studying the interaction of short-lived particles with nuclei, a target of the highest possible density is advantageous. Very large diamond targets were prepared to investigate the interaction ...of Ξ particles with carbon nuclei. The high density of diamond significantly increases the probability that the Ξ will interact before it decays. The present target construction depended on the availability of commercially produced 1-cm square diamond wafers which could be assembled into 1-cm cubes. Targets of 40
cm
3 for Brookhaven AGS experiment E885 and 16
cm
3 for an experiment at the KEK Laboratory, Japan, were made. Analysis of the E885 data confirmed the higher yield with diamond over lower-density carbon targets.
Two acrylic cube phantoms have been constructed for BNCT applications that allow the depth distribution of neutrons to be measured with miniature
10
BF
3
detectors in 0.5-cm steps beginning at 1-cm ...depth. Sizes and weights of the cubes are 14 cm, 3.230 kg, and 11 cm, 1.567 kg. Tests were made with the epithermal neutron beam from the patient treatment port of the Brookhaven Medical Research Reactor. Thermal neutron depth profiles were measured with a bare
10
BF
3
detector at a reactor power of 50 W, and Cd-covered detector profiles were measured at a reactor power of 1 kW. The resulting plots of counting rate versus depth illustrate the dependence of neutron moderation on the size of the phantom. But more importantly the data can serve as benchmarks for testing the thermal and epithermal neutron profiles obtained with accelerator-based BNCT facilities. Such tests could be made with these phantoms at power levels about five orders of magnitude lower than that required for the treatment of patients with brain tumors.
Standard neutrino spectrum from B 8 decay Bahcall, John N.; Lisi, E.; Alburger, D. E. ...
Physical review. C, Nuclear physics,
7/1996, Letnik:
54, Številka:
1
Journal Article
We have searched for neutrons from the three-body photon-induced reaction {sup 9}Be+{gamma}{yields}{alpha}+{alpha}+n using bremsstrahlung produced by electrons from a 2-MV Van de Graaff on a gold ...target. The target was located within a block of beryllium surrounded by an array of {sup 3}He proportional counters embedded in paraffin. Based on energy and intensity calibrations of the accelerator and detector using the {sup 9}Be+{gamma}{yields}{sup 8}Be+n reaction, an upper limit of 93 nb (4{sigma}) was placed on the cross section for neutron production between the three-body and two-body thresholds. This value is substantially below a previous experimental result using photoexcitation by {sup 142}Pr gamma rays and also below an earlier theoretical estimate. Bremsstrahlung spectra from the gold target were also measured in a NaI(Tl) detector at electron energies from 1.7 to 2.0 MeV and angles of 0 deg. to 60 deg. with respect to the beam axis. An analysis of photons above the 1665-keV two-body threshold shows that bremsstrahlung due to beta rays between 1665 keV and the 2160-keV end point of the {sup 142}Pr beta-ray spectrum could account for the photoneutron yield in the three-body region that had previously been attributed to {sup 142}Pr gamma rays.
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