306 PRACTICE OF PHYSIC, 



SECT. II. O* 1 THE H.EMATURIA, Oil THE VOIDING OF BLOOI> 



FROM THE URINARY PASSAGE. 



M XXXI 1 1. It is alleged that an haematuria has occurred 

 without any other symptom of an affection of the kidneys or 

 urinary passages being present at the same time ; and, as this 

 happened to plethoric persons, and recurred at fixed periods, 

 such a case has been supposed to be an instance of idiopathic 

 haematuria, and of the nature of those active haemorrhagies I 

 have treated before. 



MXXXI V. I cannot positively deny the existence of such a 

 case, but must observe, that there are very few instances of such 

 upon the records of physic ; that none have ever occurred to 

 my observation, or to that of my friends ; and that the observa- 

 tions adduced may be fallacious, as I have frequently observed 

 an hasmaturia without symptoms of other affection of the kidney 

 or urinary passages being for the time present, whilst, however^ 

 fits of a Nephralgia calculosa having, before or soon after, hap- 

 pened, rendered it to me sufficiently probable that the haematu- 

 ria was owing to a wound made by a stone present in some part 

 of the urinary passages. 



MXXXV. The existence of an idiopathic hasmaturia is fur- 

 ther improbable, as a general plethora is more likely to produce 

 an haemoptysis (MXXIL), and, as we do not well know of any 

 circumstance which might determine more particularly to the 

 kidneys. An idiopathic hoematuria, therefore, must certainly 

 be a rare occurrence ; and instances of symptomatic affections of 

 the same kind are very frequent. 



M XXX VI. One of the most frequent is, that hagmaturia 

 which attends the Nephralgia calculosa, and seems manifestly to 

 be owing to a stone wounding the internal surface of the pelvis 

 of the kidney or of the ureter. In such cases, the blood dis- 

 charged with the urine is sometimes of a pretty florid colour^ 

 but for the most part is of a dark hue : the whole of it is some- 

 times diffused or dissolved, and therefore entirely suspended in 

 the urine ; but, if it is in any large quantity, a portion of it is 

 deposited to the bottom of the vessel containing the voided 

 blood and urine. On different occasions, the blood voided 



