A 71-year-old man with lumbago went into shock in our emergency room and died despite attempted resuscitation. Autopsy revealed an abdominal aortic aneurysm that had ruptured into the subserosa of the sigmoid colon and the retroperitoneal cavity.

The authors have been studied the effects of low energy semiconductor laser on capillary blood flow of the skin. In the present paper, we report a comparative study of acupuncture, low energy He-Ne laser and semiconductor laser.
[SUBJECT & METHOD] Subjects were five healthy adults. Two types of laser irradiation and in situ acupuncture using No. 20 needle, 30mm in legth, were separately applied to the right Hegu (IC4) for 10minutes. Two laser types were low energy He-Ne (632.8nm, 8.5mW) and low energy semiconductor MR-180Is (830nm, 30mW). Capillary blood flow of the skin was measured at the palmar center of right index fingertip before, during and 30 minutes after stimulation using a laser doppler blood flow velocity meter (LDV, ALF2100). Measurement was carried out after 20-minute rest in a room maintained at the temperature of 25±0.5°C.
[Result] After the acupuncture stimulation, blood flow rose to 140% of the original level and it was retained throughout the measurement period. By He-Ne or semiconductor laser irradiation, blood flow rose to 111% and 107%, respectively, but it showed tendency to decrease and reached below the original level 30 minutes later.
[CONCLUSION] Acupuncture stimulation demonstrated heigher effect in improving the peripheral blood circulation than He-Ne laser or semiconductor laser irradiation.

Infectious abdominal aortic aneurysm is a relatively rare disease, and there is no consensus regarding its surgical treatment. Medical infectious control should be concerned comparison with surgical treatment if there is sepsis, however we sometimes have no other choice but emergency operation for uncontrollable cases. In many reports, cryopreserved homografts were used as in-situ alternative grafts for infectious aortic aneurysms because they had some merits such as anti-infectious effects, suitability and so on. However the number of in-situ cryopreserved homograft replacement cases are few, and the long term result is unclear. We encountered a ruptured cropreserved homograft case 7 months after urgent in-situ cryopreserved homograft replacement. We report the case and refer to the relevans literature.