This is the cycle that keeps repeating itself in the Johannesburg surgical wards overseen by Professor Thifheli Luvhengo.
“We are being overwhelmed by diabetes. As a surgeon, this is a cry for help. The epidemic is so huge. We need help not to treat diabetes, but to prevent it,” says a quietly desperate Luvhengo, chief of surgery at Charlotte Maxeke Johannesburg Academic Hospital.
“It is rare that a patient with diabetic foot sepsis gets out of hospital within six weeks.
“Patients with diabetic foot sepsis end up competing with patients with cancers, people who have been in car accidents and other surgical emergencies for the limited number of beds available, as they stay long in hospital.”
At any given time, about a third of the 80 patients in the hospital's surgical wards will be occupied by patients who have diabetic complications.
However, the situation at the 14 smaller Gauteng hospitals that refer patients to Charlotte Maxeke is far worse, says Luvhengo. There, he estimates, 60-70% of surgical patients are diabetic.
“They come in late with sepsis, if they are lucky to get a space in tertiary hospitals; usually infection of the toe. We amputate the toe. The infection spreads. Within three days, we have to amputate the foot. Then, below the knee. Then, above the knee. One third of these patients, minimum, are going to die in hospital from within months to a year.”
Those who don't die go home to very different lives with much-reduced mobility.
“There are no prostheses (artificial limbs), so most of the patients never go back to work,” says Luvhengo.
“And these are not old people. These are not 50- and 60-year-olds. Many are in their forties. They are mostly poor patients from townships and rural areas.”
Diabetes can cause blood vessels to narrow, and this reduces the flow of blood to legs and feet. It can also cause nerve damage so that some diabetics don't feel pain and don't realise that they have a cut or any injury on their foot. These wounds can get infected before patients even notice. Gangrene (tissue death) and bone infection are common.
“If the blood flow is poor, the infection spreads quickly,” explains Luvhengo.
“There are different infectious organisms which collaborate to cause damage. One destroys the tissues. Another thrives in rotting tissues. Antibiotics are either not strong enough or are not able to reach poorly perfused or dead tissue. So we have to amputate.
“We start with what we call guillotine amputation. We cut the bone and the meat and muscles. But we leave it open and dress it. We don't stitch immediately in case there are complications due to residual infection. Then we shorten the bone and cover the skin. But it invariably becomes septic again.”
Sadly, the lack of surgical beds also means that there is no room for diabetic patients at the early stages of infection - worsening their chances of escaping the truly horrifying spiral of amputations.
Luvhengo, who recently turned 50, says there were no diabetic patients in surgical wards when he qualified as a doctor in 1991. Seven years later, when he qualified as a surgeon, there were one or two. Now, diabetic patients dominate the wards - “because of diet and lack of exercise - but predominantly diet”.
Diabetes is also a major cause of blindness, kidney failure, heart attacks and strokes, says endocrinologist Dr Sundeep Ruder, who deals with the complications of diabetes every day.
Around 9.5% of South Africans over the age of 15 - about 5.3 million people - have diabetes, yet almost half are unaware of this, according to the Society for Endocrinology, Metabolism and Diabetes of South Africa.
However, Ruder is emphatic that the condition is completely preventable and can be managed relatively easily if it is detected early, treated properly and patients are prepared to change their diets, exercise and manage stress.
“Excessive calorie consumption and sedentary lifestyles within stressful environments are the main contributors to the development of diabetes,” says Ruder, who is also a spokesperson for the Healthy Living Alliance.
Meanwhile, Luvhengo speaks of “a factory making diabetic children”, referring to the sugary drinks parents give to their kids priming them to become diabetic within 10 years.
South Africans’ consumption of sugary drinks increased by 68% between 1999 and 2012, with nine- and 10-year- olds among the highest consumers of sugary drinks in the world, beaten only by kids in the US, according to research.
“The amount of sugar in a can of Coke is like giving a child two lunches. The pancreas secretes insulin to fight the high sugar and the excess is converted to fat. We are becoming fatter and fatter and then we become diabetic,” says Luvhengo.
Obese people are up to 80 times more likely to develop type 2 diabetes than those with a normal body-mass index of less than 22. The reasons are complicated. One is that fat cells make the body less sensitive to insulin, which then disrupts the processing of sugar.
Earlier this year, StatsSA revealed that in 2015, diabetes had overtaken tuberculosis as the biggest killer of South African women - perhaps not surprisingly when 70% of women and 40% of men are overweight.
Despite the surge in diabetes cases, the government's response has been sluggish - with costly consequences.
“The cost of treating diagnosed diabetics is approximately R3.6 billion for this year alone, according to our preliminary research, which is not yet published,” says Professor Karen Hofman, who is director of PRICELESS SA, a health economic policy research unit that operates at Wits University.
“Around 60% of diabetic cases are undiagnosed. If diagnosed and undiagnosed cases are considered, diabetes will cost the country approximately R8.7bn this year,” says Hofman.
By 2030, the cost will have climbed to R11bn if the prevalence rate remains at 7% of the population. But if no preventive measures are put in place and new cases grow by 35%, the cost will balloon to R56bn.
“Our healthcare system is already overburdened and the country cannot afford these costs,” says Hofman.
“We are facing a crisis with huge economic costs and we cannot afford to wait in implementing population-wide preventive interventions like a tax on sugary drinks.”
The tax, initially supposed to be implemented on April 1, is still languishing in Parliament and has been brought down from a 20% to a 10% tax on a can of cooldrink after massive opposition from beverage companies and the sugar industry.
However, Parliament's joint finance and health committees are expected to decide on the tax later this month, after which it will be sent to the National Assembly to be voted on.
Meantime, many people sipping on sugary drinks are oblivious to the possibility that they might be taking the first steps down a very painful road.