CHAP. IV. Of the Haemorrhoid Veins.
THe Haemorrhoidal Veins are those which are in the Funda∣ment,* 1.1 or Intestinum rectum, and are also extrinsecally visible, which in some men at set times do open of their own accord, and void forth dreggie Blood, which evacuation does much conduce to Health.
These Veins are not of one kind, as the Ancients and many* 1.2 later writers have Imagined: But some are termed internal, which arise from the Vena portae, others external, from the Cava, with which the haemorrhoidal Arteries are associated, through which the Humors to be evacuated, are carry∣ed.
The Ancients knew only the Internal ones, as being commended in melancholick and spleenetick diseases: and they may be opened about the fundament, or leeches may be applied to them, whereas otherwise no branches of the Vena portae which lies concealed within, do go out to the skin, which can be opened.
The internal and external Hae∣morrhoid Veins differ one from* 1.3 another.
I In their Original. For the Internal arises as was said before, From the Vena portae, and de∣scends along the end of the Colon, under the right gut, the end whereof or Fundament, it circularly embraces with certain smal twigs. It arises sometimes from the Ramus splenicus, from whence is the Vas breve. But seldome which Casserius once observed, from the Spleen it self. Veslingus observed it twice or thrice, and there∣fore Robert Flud is out, who condemns the opening of the Haemorrhoid Veins, because they void not from the Spleen▪ but rather from the Mesenterie, to the great dam∣mage of the Guts and Stomach.
But the external Haemorrhoides arise from the Hypo∣gastri••k branch of the Cava.
II By their Insertion For the internal is inserted into the substance of the Intestinum rectum, which is membra∣nous, and required thick Blood made in the Spleen, and communicated by the Arteria Coeliaca or Splenica.
The external are inserted into the Musculous Sub∣stance of the Fundament, which required purer Blood, elaborated in the Heart, and brought hither by the bran∣ches of the Arteries.
III In Number, the Internal is one in number, the ex∣ternal is threefold.
IV In the Quality of the Blood contained. The Blood of the inner is thick and black, the Blood of the outer is thinner and redder.
V In their Use The internal empty the Vena port•• successively, but first the Spleenick Arteries, and help the Obstructions of the Spleen: the external empty the Ve∣na Cava, the Liver by accident, but primarily the great Arterie, and the Heart; yea their evacuation cures dis∣eases springing from Blood, of the Head, Chest, &c. Which Hippocrates hints in his Aphorismes, and there∣fore the internal are said to cure the Cacochymia, or bad∣ness of Humors, the external the Ple••horia or fullness of good Blood.
VI In the plentiful profusion of Blood. The flux of the internal ones is not so plentiful; that of the external is sometimes so large, that men die by the extremity thereof, or fal into greivous diseases.
VII In the Evacuation of the external ones, there is no Paine nor Gripeing of the Eelly; and some times also no paine in the Fundament; but in the flux of the inner Haemorrhoides, there is greivous paine.
VIII The Internal do alone descend, unaccompanyed with the Arteries, howbeit either the Arteries are hid∣den, or they depend of Arteries in the upper-more.
The external descend with the Arteries to the Muscles of the Fundament, manifestly; and therefore the external are more properly called Vasa Haemorrhoidalia, to include the Arteries with the Veins.