In reducing the Anterior Luxation, the hurt Person is to be laid upon the side opposite to the Luxation, and Extensions are to be made, by drawing both upward and down-ward, as before: Then the Head of the Bone is to be forc'd, by the means of a Ball thrust strongly with the Knee, in drawing the luxated leg toward the other.
The Posterior Luxation is thus reduc'd; The Patient being laid upon his Belly, the double Extension is to be made, and his Knee drawn outward, to set the Bone in its place. After the Operation hath been perform'd, a Bolster is to be apply'd, steept in Spirituous Medicaments; and the Bandage call'd Spica, of which we have given an Account in treating of the Luxation of the Shoulder.
C H A P. XIV.
Of the Luxation of the Knee.
When the Tibia is luxated behind, its Prominences are in the Cavity of the Ham, and the Leg flies off, or is bended. If the same Tibia be dislocated on the side, a kind of Tumour appears in the luxated side, and a Sinking in the opposite. But if the Condylus of the Tibia remains in the inside, the Leg turns outward; and if it be in the outside, it turns inward.
The Posterior Luxation is reduc'd by obliging the Patient to lie upon his Belly, whilst the Surgeon during the Extensions bends the Leg, in drawing the Heel toward the top of the Thigh.
If the Tibia be luxated on the side, the usual Extensions are to be made, and the Bone is to be push'd with the Knee.