Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

Q: Abstract: Severe traction injuries may damage the brachial plexus at any level from the spinal cord to the axillary outlet. Investigation aims to determine the level of the injury for each of the nerves, trunks or cords, with particular reference to obtaining firm evidence of any intradural (pre-ganglionic) damage. We report the results of computerised axial tomography of the cervical spine in comparison with conventional myelography and with surgical exploration of the plexus. CT scanning with contrast enhancement greatly improves diagnostic accuracy, particularly at C5 and C6 root levels.
Which is the apt title for the abstract? option1: Computerised axial tomography in traction injuries of the brachial plexus. option2: Intraoperative coronary angioscopy. Technique and results in the initial 58 patients.

A: Computerised axial tomography in traction injuries of the brachial plexus.
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Q: Abstract: Eighty-two women with symmetric cornual blockage were selected for evaluation of the results of microsurgical anastomosis in relation to data from preoperative hysterosalpingography and histologic study of excised tubal specimens. Serial sections from 164 occluded tubal portions were examined. The term pregnancy rate was 44%. Several prognostic factors influencing the postoperative pregnancy rate were revealed: maximized tubal length; preserved intramural portion; absence of chronic inflammation; absence of tubal inclusion in the tubal wall; and absence of tubal endometriosis.
Which is the apt title for the abstract? option1: Prognostic factors influencing the pregnancy rate after microsurgical cornual anastomosis. option2: Fracture dislocation of the femoral head treated by open reduction and internal fixation.

A: Prognostic factors influencing the pregnancy rate after microsurgical cornual anastomosis.
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Q: Abstract: By use of an improved density measuring system, we found that the gravimetric density of arterial blood of dogs fluctuates at the same frequency as the spontaneous or mechanical ventilation. Similar density fluctuations were observed in the blood leaving isolated, perfused lobes of dogs that were ventilated cyclicly. Employing an analysis that balanced the erythrocyte and plasma flows through distensible capillaries containing blood with a tube hematocrit lower than the hematocrit in large blood vessels, we derived a relationship to estimate from the density fluctuation the change in pulmonary capillary blood volume (Vc). For mechanical ventilation, the maximum change in density over one ventilation cycle increased from 0.084 +/- 0.01 to 0.47 +/- 0.05 (SE) g/l as the frequency decreased from 29 to 6 cycles/min. These density changes were estimated to be the result of an 1-16% change in Vc. A larger tidal volume for the mechanical ventilation led to a larger density fluctuation. The maximum density change of spontaneous respiration of 6 cycles/min was one-sixth of the mechanical case, indicating a much smaller change in Vc during spontaneous respiration. When the airway flow resistance was increased for spontaneous respiration, larger density fluctuations were observed.
Which is the apt title for the abstract? option1: Ventilatory changes of pulmonary capillary blood volume assessed by arterial density. option2: Tubulo-interstitial lesions mediate renal damage in adriamycin glomerulopathy.

A:
Ventilatory changes of pulmonary capillary blood volume assessed by arterial density.
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