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BONNEY’S GYNAECOLOGICAL SURGERY
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The material of which all these devices are construct­ed is inert and remains with the patient for the rest of her life, although on occasions following fibrosis of the surrounding tissues they can dislodge from the fal­lopian tubes and can be seen lying within the pouch of Douglas.
It is said that the advantage of these mechanical obstructive devices is that they damage only a small portion of the tube so that it is relatively straightfor­ward to reconstruct the tubes in the future, giving a re­alistic prospect of pregnancy. The authors would stress that it should not be the policy of any doctor to recom­mend sterilization techniques on the basis that they may be reversed; all patients embarking on a steriliza­tion operation must do so in the knowledge that the procedure is permanent.
Further reading
Why Women Die 1997–1999: The fifth report of the confiden-
tial enquiries into maternal deaths in the United Kingdom.
London: RCOG, 2001.
References
Ectopic pregnancy is multifactorial in its aetiology. Breen JL (1970) A 21-year survey of 654 ectopic pregnancies (Am J Obstet Gynecol 106:1004–19) reviews the disease process, particularly predisposing factors and site of ectopic.
Bronson RA (1977) Tubal pregnancy and infertility (Fertil
Laparoscopic methods
The technique of laparoscopy is described in Chapter
17. The ease with which the tubes can be visualized and manipulated has virtually eliminated the need to perform open tubal ligation procedures.
After introduction of the laparoscope and an addi­tional trocar/introducer into the abdominal cavity, various appliances can be used to perform the tubal occlusion procedure.
Shortly after the first use of laparoscopy, there devel­oped a great vogue for diathermy of the tubes and resection of the diathermied area. Although this technique has been successfully used to sterilize many thousands of women, it is potentially dangerous and has been superseded by the application of tubal occlu­sion devices to the tubes using applicators specially designed for this purpose.
The devices include the Falope rings, small Silastic rings which are applied by drawing the fallopian tubes up into a hollow applicator and then releasing the ring from the end of the applicator so that the ring lies firmly around the loop of tube. These techniques carry the same disadvantages as the Pomeroy operation.
The Hulka and Filshie clips are small locking devices, which are applied to the tubes using special applicators, and if applied appropriately will seal the tubes com­pletely. Despite common practice, it is not recommend­ed that the clips be applied in pairs to each tube because of the potential risk of a symptomatic hydrosalpinx developing between the two clips.
Fig. 18.4 Ligation and resection of the fallopian tube.
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Details of the technique of clip sterilization is contained in
the original articles by Hulka et al and Filshie et al.
Hulka JF, Omran KF, Lieberman BA and Gordon AG.
Laparoscopic sterilization with the spring clip: instrumenta­tion, development and current clinical experience. Am J Ob- stet Gynecol 1979;135: 1016–20.
Filshie GM, Casey D, Pogmore JR, Dutton AG, Symmonds
EM and Peake AB. The titanium/silicone rubber clip for fe­male sterilisation. Br J Obstet Gynaecol 1981;88:655–62.
Steril 28:221–8) demonstrates the high risk of ectopic preg­nancy arising in those women who have undergone surgery on the fallopian tubes with a view to correcting infertility.
Nicholas Kadar has reappraised the aetiology, diagnosis
and treatment of ectopic pregnancy in a chapter in the Progress in Obstetrics and Gynaecology series (vol. 3, 1983) John Studd (ed.), published by Churchill Livingstone.
One of the original references to silicone rubber ring sterili­zation (Falope ring) is Yoon IB, Wheeless CR and King TMA (1974) Preliminary report on a new laparoscopic sterilization approach. The silicone rubber band technique. Am J Obstet Gynecol 120: 132–6.
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papillae, thickened septae, bilateral lesions and ascites are suggestive of malignancy, as is an increased blood flow on doppler studies. In these cases an abdominal ultrasound scan should also be performed to assess the upper abdomen (liver, omentum and para-aortic lymph nodes) for evidence of malignant spread.
The determination of serum levels of the tumour marker CA125 is also useful in differentiating benign from malignant cysts, especially in the postmenopausal woman. The authors currently use the ultrasound findings combined with a serum CA125 level and menopausal status to calculate the risk of malignancy index (RMI) to differentiate benign from malignant lesions. Those with a RMI of >200 are at increased risk of malignancy and are managed by gynaecological oncologists, whilst those with RMI <200 are managed by the gynaecologist.
Surgery
The role of surgery for an ovarian cyst is its removal and histological diagnosis. In women under 40 years of age, benign cysts should be managed using ovarian­preserving procedures, but above that age an oophorectomy may be more appropriate. If there is doubt about the nature of the cyst, frozen section of the cyst should be undertaken.
Since the last edition of this textbook, laparoscopic surgery has become the gold standard in the treatment of benign ovarian masses in many centres, with laparoto­my being reserved for the treatment of malignant tumours. However, the laparoscopic management of ovarian cysts has been controversial because of the con-
Operations for benign ovarian disease
19
Ovarian cysts are said to be the fourth most common gynaecological cause for hospital admissions. They are classified as non-neoplastic functional cysts such as fol­licular or corpus luteum cysts, or neoplastic cysts. Their ratios vary with age but approximately:
1 25% are functional cysts. 2 40% are benign cystadenomas. 3 15% are dermoid cysts (benign). 4 10% are endometriotic cysts. 5 10% are malignant cystadenocarcinomas.
The rapid development of ultrasound technology and its increasing use in routine gynaecological practice has led to an increased diagnosis of ovarian cysts in women of all age groups. In premenopausal women the majority of lesions are benign functional cysts which usually disappear with menstruation or can be man­aged conservatively by suppression of ovulation with the combined oral contraceptive pill. Persistent cysts or those suspicious of malignancy require surgical removal. In recent years there has been an increasing use of the laparoscope for assessment and removal of adnexal cysts thought to be benign in nature.
Diagnosis of an ovarian mass
The normal ovary is usually palpable in the pre­menopausal woman but barely palpable in the post­menopausal. Consequently, almost any enlargement should be looked upon with suspicion and warrants further investigation. Transvaginal sonography is the investigation of choice not only in the detection of the ovarian cyst, but also in the assessment of potential malignancy. Features such as multiple cysts, solid areas,
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meticulously performed as described in Chapter 6, to­gether with the collection of washings from the peri­toneal cavity. If there is any free fluid in the abdomen its presence should be recorded and it should be removed before washings are taken and sent separately for cytology. Washings are best carried out by instilling 100–200 ml of normal saline into the pelvis and along the paracolic gutters and then collecting the fluid using a large syringe. NB: it is not unusual to find a small quantity (20–50 ml) of fluid in the peritoneal cavity in association with benign lesions.
Extraction of the enlarged ovary
If the cyst is large, it is easily delivered from the wound; if the cyst is relatively small, or the tubes and infundibu­lopelvic ligaments are resistant, the procedure can be performed within the abdomen, using a self-retaining retractor to give adequate access.
Incising the capsule of the cyst
It is often possible to identify the edge of the normal ovarian tissue running along the lower part of the ovary. If this is so, the knife should be lightly run along this line (Fig. 19.1); the plane of cleavage will readily
cern of accelerating intraperitoneal dissemination of an unsuspected ovarian cancer. Although the evidence for this is not overwhelming, definitive surgery in this situa­tion should be undertaken within 2–3 weeks and the tro­car sites should be excised as part of the procedure. With careful preoperative assessment and appropriate selec­tion of cases the situation should arise infrequently.
The principles of laparoscopic surgery for ovarian cysts are similar to that at open surgery, but the ap­proach and technique differ and have been described in Chapter 17.
Ovarian cystectomy
Victor Bonney gave this name to the procedure where­by the cyst is removed without compromising the func­tion of the ovary. The same technique is used for the enucleation of a small solid ovarian tumour such as a fibroma.
For ovarian cystectomy to be successfully carried out, the mass to be enucleated must have a capsule (a characteristic of most benign tumours), the most com­mon exception being endometriotic cysts, which rarely have a recognizable capsule and can usually only be separated from the ovary by sharp dissection.
The benign tumours of the ovary which are amenable to the technique include:
1 Benign teratomas (dermoids). 2 Serous cystadenomas. 3 Corpus luteum cysts. 4 Fibromas.
The procedure should always be considered in young women where ovarian preservation is to be desired, particularly where the cysts are bilateral and total loss of the ovaries would produce a premature climacteric.
The operation (laparotomy)
Opening the abdominal cavity
This is described in Chapter 6. The decision to use either the transverse or the longitudinal incision will obviously depend on the size of the ovarian cyst and whether there is any possibility of the tumour being malignant. If there is any likelihood that the mass is malignant, a vertical incision must be carried out.
Exploration of the abdomen
The examination of the entire abdominal cavity is
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Fig. 19.1 Incising the capsule of an ovarian cyst.
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5 mm trocars are inserted either side of the lower ab­domen for instrumentation and occasionally a further suprapubic port may be necessary. Using a 5mm laparoscope increases the flexibility as it can be inserted into any port.
Exploration of the abdomen
This is identical to the open approach and washings should also be taken for cytology. If there is any suspi­cion of malignancy, a biopsy should be performed and the operation abandoned with referral to a gynaecolog­ical oncologist, or if appropriate converted to a laparotomy.
Incising the capsule of the cyst
Using laparoscopic scissors and forceps an attempt is made to find a plane of cleavage to remove the cyst intact. For large cysts and where there is difficulty find­ing a plane, the cyst may be punctured and the fluid aspirated. This should be performed in an endobag inserted through the umbilical port to avoid leakage into the peritoneal cavity. The cyst lining is examined for any areas suspicious of malignancy and if not the cyst wall is excised. Haemostasis is obtained and there is no need to repair the ovary.
Removal of the ovarian cyst
The ovarian cyst is placed in an endobag and removed through the umbilical port which may need to be ex­tended or the cyst is aspirated in the bag before re­moval. It is frequently simple to insert the Verres needle through the entrance to the endobag which has been brought out of the port and then by applying counter­traction the needle can be inserted cleanly into the cyst and the fluid content extracted. This procedure eliminates contamination of the port by the cyst or its contents.
Port closure
The umbilical port site is closed in layers.
Removal of a retroperitoneal cyst
The majority of retroperitoneal (or broad ligament) cysts are ovarian cysts which have grown retroperi­toneally. This is more likely to occur after hysterectomy with ovarian conservation when the ovaries frequently become retroperitoneal structures.
become apparent and should now be developed using blunt dissection either with the handle of the scalpel, or, as the authors prefer, with Monaghan’s scissors, using the blunt points to separate and develop the plane.
The incision is now carried further around the cyst
The cyst is gently peeled back from the normal ovarian tissue (Fig. 19.2) until all that is left is a thin strip of normal ovary which is cut with the scissors.
Repair of the remaining ovarian tissue
Usually, there is a thin rim of redundant capsule which should be resected back to the thicker normal ovarian stroma. The edges of the ovarian tissue are brought together using fine interrupted sutures.
Abdominal closure
The ovary is returned to the abdomen and the wound closed as described in Chapter 6.
The operation (laparoscopy)
Insertion of trocars
Unless contraindicated, a 12 mm trocar is inserted into the umbilicus either by an open technique or following insufflation followed by the laparoscope. Two further
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Fig. 19.2 Removing the ovarian cyst intact.
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small veins which lie in the same position. If oozing does occur, tissue must not be blindly clamped; the best technique is to insert a swab into the bleeding space, ap­plying a little pressure and wait for 2 min, taking care to inform the scrub nurse that a swab has been inserted and is marked up. When the swab is removed the whole field is dry and the small bleeding points can be identi­fied and ligated. If the cyst is ovarian in origin one can either perform a cystectomy or oophorectomy.
Dealing with the peritoneum
After the cyst or ovary has been removed and haemostasis secured, no attempt is made to repair the pelvic peritoneum.
Abdominal closure
The abdomen is closed in the manner described in Chapter 6.
Difficulties and dangers
If the safeguards mentioned above are taken with re­spect to the ureters and to the uterine vessels, then this procedure should not produce any problems. Haemor­rhage may be troublesome and the anatomy distorted and discoloured, making identification of structures problematic.
Proper identification of all structures will make this a simple procedure, ‘short cuts tend to make long operations’.
The exact position of the ureter will vary depending on the size and extent of the retroperitoneal extension of the cyst, stressing the vital importance of identifying the ureter at an early stage in the procedure and following it for the full length of its course across the cyst. Clear identification and separation of the ureter will remove the most important danger in this procedure.
The operation
Identification of the cyst
Having opened the abdomen as described in Chapter 6, the cyst is palpated and its limits defined.
Opening the peritoneum and identifying the ureter
The safest area to open the peritoneum is between the fallopian tube and the round ligament. The peritoneum is incised and the edges picked up (Fig. 19.3). The inci­sion is now curved posteriorly so that by separating be­tween the cyst and the lateral pelvic side wall, using the fingers, the ureter can be isolated as it courses in the peritoneum over the cyst. Usually, the plane of cleavage is easily found and the cyst is rapidly circumnavigated.
Enucleation
If the cyst is not ovarian in origin it usually shells out without great difficulty, but if it has burrowed below the uterine artery this can be sacrificed together with
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Fig. 19.3 Opening the peritoneum and identifying the ureter.
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superseded as first-line management by the use of clomiphene and the human gonadotropins.
The operation consists of delivering the ovary and taking out a longitudinal ‘orange segment’ of the ovarian tissue. The two halves of the ovary are then reapposed using interrupted Vicryl or nylon sutures (Fig. 19.4).
Further reading
M Canis from Clermont Ferrand, France has one of the largest experiences in laparoscopic surgery for adnexal masses having managed over 1600 cases and published widely on the subject. Recent articles include: Canis M, Botchorishvili R, Manhes H, Wattiez A, Mage G, Pouly JL and Bruhat MA. Management of adnexal masses: role and risk of laparoscopy. Semin Surg Oncol 2000; 19:28–35. Canis M, Rabischong B, Houlle C, Botchorishvili R, Jardon K. Safi A, Wattiez A, Mage G, Pouly JL and Bruhat MA. Laparo­scopic management of adnexal masses: a gold standard? Curr
Opin Obstet Gynecol 2002;14:423–8.
Variations
It is possible for an ovarian cyst to grow downwards and forwards into the broad ligament so that it mimics a true broad ligament cyst. The management is as de­scribed above except that the cyst will have a pedicle which must be identified, clamped and cut.
Wedge resection of the ovary
This procedure had a much greater vogue in the past, possibly out of misdiagnosis and a failure to under­stand that an ovary with multiple small follicular cysts is in no way abnormal. Unfortunately, small cysts on the ovary are often all that is found when laparotomies are performed for unattributable pelvic pain. It is very doubtful whether these small cysts can ever be blamed for the pain which has provoked the laparotomy. Punc­turing of the cysts or wedge resection of the ovary was often performed.
The procedure was also popularized in the manage-
ment of Stein–Leventhal syndrome but has now been
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Fig. 19.4 Wedge resection of the ovary.
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Preparation of the patient
The patient should be prepared as for any laparotomy, but with certain special considerations: 1 All patients with a suspected ovarian mass should have a preoperative risk of malignancy index (RMI) calculated to determine the likelihood of the mass being of malignant origin. The RMI is calculated using a simple and useable formula that incorporates a com­bination of ultrasound scan features of the ovarian mass, the serum CA125 tumour marker result and the menopausal status. 2 If the RMI result is suggestive of malignancy, then the patient is best referred to a gynaecological oncology centre for treatment. 3 Various other tumour markers including carcinoem­bryonic antigen (CEA), CA199 and CA153 should also be considered to determine the possibility of the ovarian mass being due to metastatic spread from an­other site. In young patients, the clinician should be alerted to the possibility that the ovarian mass is of germ cell type, and include a-fetoprotein, human chori­onic gonadotropin (HCG) and lactate dehydrogenase (LDH) serum estimations as part of their tumour marker screen. 4 The bowel should be prepared prior to surgery for possible resection by use of a low-residue diet together with large bowel clearance and a non-absorbable an­tibiotic for 2 days prior to surgery. Stoma siting is advisable as the patient will not be thankful for a trou­blesome stoma, which might have been better placed. 5 A chest X-ray is necessary to exclude obvious chest metastases and pleural effusions, which may require drainage prior to surgery.
Operations for malignant ovarian disease
20
Surgery for malignant ovarian disease can be the most challenging of surgical procedures in gynaecological practice. The disease invariably presents late in its course, at which point there is widespread peritoneal dissemination of tumour. Currently, the standard treat­ment consists of a combination of primary surgical de­bulking in an attempt to achieve complete or optimal cytoreduction, followed by a course of chemotherapy. Recent evidence has also confirmed the significant value of surgical cytoreduction as an interval procedure during the course of chemotherapy if optimal debulk­ing was either not performed or not achievable in the primary setting. In addition, surgical cytoreduction of recurrent disease would appear to be of significant benefit not only in relieving symptoms, but also in improving outcome survival.
These operations are best performed under the auspices of a gynaecological oncology centre by highly trained, accredited gynaecological oncologists who are more able to achieve maximum cytoreduction, and are better placed to provide the multidisciplinary care that is required to allow the greatest likelihood of cure.
Ovariotomy
Ovariotomy was first performed successfully in 1809 by McDowell in the USA, replacing the procedure of tapping of ovarian cysts with a potentially curative operation. The term ovariotomy or ovariectomy is limited to the removal of a diseased ovary, whether benign or malignant.
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appropriate bowel stapling devices, a pair of Babcock’s tissue forceps, some iodine solution and a surgiclip device.
The operation
The incision
This must be of an adequate size to remove the ovarian mass intact. It must be possible to lengthen the wound easily and quickly, and allow a full visual inspection of the entire abdomen. These requirements indicate that there is no place for the low transverse or Pfannenstiel incision.
Exploration of the abdomen
This is carried out in a meticulous manner, paying particular attention to the leaves of the diaphragm, the liver, the para-aortic lymph nodes and the omentum as well as a complete pelvic assessment. Ideally, these find­ings should be recorded on a ‘tick sheet’ in theatre.
Peritoneal washings
If present, a small amount of ascitic fluid should be sent for cytological assessment. In addition, the amount of ascitic fluid removed should be recorded. In the absence of ascites, peritoneal washings should be performed from within the pelvis, both paracolic gutters and the upper abdomen, in association with the performance of smears obtained from both diaphragmatic leaves.
Tapping of the cyst
This section is only retained to reaffirm that there is no place for the tapping of ovarian cysts; every effort should be made to remove the cyst intact and the wound lengthened to accommodate this removal.
Delivery of the ovarian mass
As many ovarian tumours reach an enormous size be­fore the patient presents for treatment, it is not infre­quently found that there are adhesions to bowel and other peritoneal surfaces (Fig. 20.1). Where the mass is carcinomatous, there may be direct extension of the tumour into surrounding structures. At the time of the preliminary examination, the extent of these adhesions must be noted. The cyst must be released from its adhe­sive attachments before delivery from the abdomen. This process often involves considerable manoeuvring of the mass and extension of the wound will often ren-
6 Preoperative drainage of ascites should be avoided as much as possible, as port site tumour implantations can be particularly symptomatic to the patient and will require excision during the cytoreductive surgical procedure. 7 When there is little doubt about the diagnosis, there is virtually no need for preoperative assessment by intravenous urogram (IVU), CT scan, MRI, barium enema or colonoscopy/sigmoidoscopy. 8 A full blood count is mandatory as many women are anaemic at presentation, and if not adequately dealt with this can exacerbate the problems associated with the significant blood loss that often accompanies the complex and prolonged procedures required during the cytoreductive surgical intervention. 9 A biochemical profile is also required as many pa­tients show considerable fluid, electrolyte and protein derangement at presentation. An experienced anaes­thetist is invaluable during the perioperative period as management of fluid balance often requires a cock­tail of ingredients first to optimize the patient, and secondly to maintain optimization during this crucial period. 10 Nutritional status is often neglected in these patients. Assesment by dietitians can usually identify those most at risk, thereby allowing intervention dur­ing the perioperative period by the use of various forms of supplementation. 11 An indwelling transurethral urinary catheter should be inserted to allow adequate monitoring of fluid balance during surgery and the early postopera­tive period.
Anaesthesia
As so many patients who come to ovariotomy have late-stage carcinoma of the ovary with associated em­barrassment of their cardiopulmonary function due to ascites and pleural effusions, it is important to use care­ful anaesthetic techniques. The authors prefer light general anaesthesia combined with epidural or spinal analgesia; this allows complete relaxation without the toxic effects of full muscle relaxant general anaesthesia.
Instruments
The instruments in the gynaecological general set outlined in Chapter 2 will be required together with
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Examination of the opposite ovary
If the patient is young and there is no suspicion of malignancy, the opposite ovary should be preserved and an ovarian cystectomy performed on the diseased side. However, if the ovarian mass shows any sugges­tions of malignancy, the authors advocate removal of the entire diseased ovary, which should be sent for immediate frozen section analysis, a technique that has been shown to be extremely accurate and useful under these circumstances. If the mass is confirmed to be ma­lignant, it is mandatory that a full staging procedure is carried out. This would include removal of any suspi­cious intraperitoneal tissues, systematic bilateral pelvic and para-aortic lymphadenectomy, complete omentec­tomy and multiple random peritoneal biopsies from various sites within the abdominal and pelvic cavity. If subsequent fertility is not a relevant issue, the staging procedure should be combined with a total abdominal hysterectomy and removal of the remaining ovary and both fallopian tubes. If immediate frozen section analy­sis is not available, an alternative approach would be to close the abdomen after removal of the diseased ovary
der a difficult task simple. Once adhesions are clear, the surgeon should elevate the cyst with the left hand; at the same time, the assistant can gently depress the sides of the wound so that the mass delivers through the wound (Fig. 20.2). Great care should be taken not to tear the pedicle, which, although large, contains many delicate veins.
Often, very large tumours are multicystic with large bosselated projections; it is easier to deliver these tumours by rotating the cyst so that one projection at a time is delivered from the wound.
There is no merit in attempting to force a large mass through a small wound and rupturing the capsule; if the tumour is malignant, the prospects for the patient will be significantly reduced.
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Fig. 20.1 Separation of adhesions from an ovarian carcinoma.
Fig. 20.2 Delivery of the ovarian cyst from the wound.
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