Walter Freeman describes his technique
In July 1948 American psychosurgeon Walter Freeman visited the Burden Neurological Institute in Bristol, England, and delivered a lecture on transorbital lobotomy. The paper was published in The Lancet later that year. In this extract he describes his surgical technique.
"We have found that transorbital leucotomy* can be performed satisfactorily in the postconvulsive phase of electro-shock. Electro-shock appears to have a generally disrupting effect on cortical activity, temporarily abolishing the psychotic manifestations and bringing the patient into a brief period of increased adaptability. When leucotomy is also performed, the effects of the electro-shock seem to be at least protracted, and often permanent. A few operations under ordinary anaesthesia have been performed by others, however, and equivalent results are reported. Nevertheless, electro-shock requires so little preparation and is so familiar to the psychiatrist that it seems to be the method of choice.
To maintain the patient in a somewhat prolonged phase of coma, two convulsive doses of electricity are given, the second about one or two minutes after the first convulsion has subsided. After the second convulsion a towel is placed over the patient's nose and mouth to prevent contamination by saliva and nasal secretions. The upper eyelid of the patient is pinched between thumb and finger, bringing it away from the eyeball. The point of the transorbital leucotome is then introduced into the conjunctival sac and moved around against the roof of the orbit until the top of the vault is encountered. The leucotome is brought parallel with the bony ridge of the nose, and its base is tapped lightly with a hammer to drive it through the orbital plate. To aim the leucotome properly the shaft must press rather strongly on the eyeball, but no harm to the globe has been noted except for occasional subscleral haemorrhage.
The transorbital leucotome consists of a tool-steel shaft 12 cm. long and 4 mm. in diameter, tapering for the last 6 cm. to a rather fine point with a slight bevel. Its handle is 7 cm. long and 8 mm. in diameter and equipped with a cross-arm at the base. The shaft is graduated in centimetres, a double line being marked at 7 cm. which is the most frequently used point.
When the leucotome has reached the 4 cm. level, its handle is pushed laterally as far as the margins of the orbit will permit to sever the fibres in the lower portion of the thalamofrontal radiation. It is again returned to mid-position and gently driven to a depth of 7 cm. always in the plane of the bony ridge of the nose. At this depth it is possible, by swinging too far, to lacerate arteries in the depth of fissures on either the medial or the lateral surface of the frontal lobe; and, since the thalamofrontal radiation is a rather narrow band in the region, a movement of only 15-20 degrees laterally and medially is sufficient. When the sweeps of the instrument have been made, it is withdrawn, and moderate pressure is maintained over the eyelids for several minutes to prevent excessive bleeding into the orbit.
Unless the patient is still deeply unconscious, an additional electroconvulsive shock should be administered before the other side is operated on. Patients seem to tolerate multiple convulsions quite well. In view of the refractory period, it is usually necessary to increase the time of passage of the electric current by repeated tripping of the switch until the convulsive threshold is reached. No complications have been encountered in doing this. After the convulsion has subsided, the other side is operated on in the same way." (W Freeman, Transorbital leucotomy, The Lancet, 4 September 1948, 371-373)
Although Freeman had coined the term "lobotomy" some years previously, he (or perhaps the editors of The Lancet) reverted to Moniz's term leucotomy for a British audience.
